# Highlights of Condensed Matter Physics (DCMP) Talks @ APS 2021 March Meeting (1)

American Physics Society (APS) March meeting is one of the largest physics meetings in the world. In 2021, the meeting will be held online due to COVID-19.

To help the community quickly catch up on the work to be presented in this meeting, Paper Digest Team processed all talk abstracts, and generated one highlight sentence (typically the main topic) for each. Readers are encouraged to read these machine generated highlights / summaries to quickly get the main idea of each talk. This article is on the talks related to **Condensed Matter Physics (DCMP)**.

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#### TABLE : Condensed Matter Physics (DCMP) 1

Title | Authors | Highlight | Session | |
---|---|---|---|---|

1 | Long-range ballistic transport of Brown-Zak fermions in graphene superlattices | Barrier, Julien; Kumaravadivel, Piranavan; Falko, Vladimir; Geim, Andre; Berdyugin, Alexey | We show that, in graphene-on-boron-nitride superlattices, Brown-Zak fermions can exhibit mobilities above 10 6 cm 2/Vs and the mean free path exceeding several micrometres. | Session 1: 2D Heterostructures: Graphene Superlattices and Moire Effects |

2 | Probing the electronic structure of a nanopatterned graphene device using nanoARPES | Jones, Alfred; Jessen, Bjarke; Gammelgaard, Lene; Biswas, Deepnarayan; Koch, Roland; Jozwiak, Chris; Rotenberg, Eli; Bostwick, Aaron; Bøggild, Peter; Jauho, Antti-Pekka; Dean, Cory; Ulstrup, Søren | Here, we have utilized nanoARPES at 200 nm spatial resolution to directly measure the electronic band structure of a nanopatterned graphene device built from an array of etched holes. | Session 1: 2D Heterostructures: Graphene Superlattices and Moire Effects |

3 | Charge sensing of an unconventional ferroelectric metal in bilayer graphene | de la Barrera, Sergio; Zheng, Zhiren; Ma, Qiong; Bi, Zhen; Liu, Ming-hao; Mao, Nannan; Zhang, Yang; Kiper, Natasha; Watanabe, Kenji; Taniguchi, Takashi; Kong, Jing; A. Tisdale, William; Gedik, Nuh; Fu, Liang; Xu, Suyang; Jarillo-Herrero, Pablo; Ashoori, Raymond | By measuring capacitances between the bilayer graphene and the top and bottom gates separately, we find large layer-asymmetric charge compressibility arising from an electronic phase transition. | Session 1: 2D Heterostructures: Graphene Superlattices and Moire Effects |

4 | Observation of flat bands in tunable semiconductor artificial graphene | Liu, Ziyu; Du, Lingjie; West, Ken; Fallahi, Saeed; Pfeiffer, Loren; Manfra, Michael; Pinczuk, Aron | Here we report the realization of flat bands of AG in GaAs quantum well transistors where the electron density is tuned by applied back-gate voltages. | Session 1: 2D Heterostructures: Graphene Superlattices and Moire Effects |

5 | Photonic crystal for graphene plasmons | Xiong, Lin; Forsythe, Carlos; Jung, Minwoo; McLeod, Alexander; Li, Yutao; Zhang, Shuai; Dong, Yinan; Liu, Song; Fogler, Michael; Edgar, James; Shvets, Gennady; Dean, Cory; Basov, Dimitri | Here we utilize cryogenic near-field optical microscopy to study the band structure induced by a graphene photonic crystal consisting of a high-mobility graphene atop a patterned SiO 2 dielectric layer [Xiong, Nat. | Session 1: 2D Heterostructures: Graphene Superlattices and Moire Effects |

6 | Topological flat bands in tetralayer graphene on boron nitride moire superlattices | Park, Youngju; Chittari, Bheema Lingam; Jung, Jeil | We show that rhombohedral four-layer graphene (4LG) nearly aligned with a hexagonal boron nitride (hBN) substrate has nearly flat low energy bands with generally non-zero valley Chern numbers. | Session 1: 2D Heterostructures: Graphene Superlattices and Moire Effects |

7 | Topological phases in N-layer ABC-graphene boron-nitride moire superlattices | Galeano, David; Chittari, Bheema Lingam; Park, Youngju; Sun, Jin-Hua; Jung, Jeil | We discuss the low energy models for rhombohedral N-layer graphene ( N=1,2,3) aligned with hexagonal boron nitride (hBN) under the influence of off-diagonal pseudo magnetic vector potential terms that alter the 120° rotational symmetry and leads to valley Chern numbers |C ν | ≤ N. | Session 1: 2D Heterostructures: Graphene Superlattices and Moire Effects |

8 | Strain tunable magnetotransport study of graphene/h-BN heterostructures | Liu, Chuankun; Tsuchikawa, Ryuichi; Berg, Jameson; Deshpande, Vikram | We study the preliminary responses of low energy bands by performing magnetotransport measurements at low temperatures. | Session 1: 2D Heterostructures: Graphene Superlattices and Moire Effects |

9 | Transparent mirror effect in twist-angle-disordered bilayer graphene | Joy, Sandeep; Khalid, Saad; Skinner, Brian | We consider a quasi-one-dimensional model of the disorder, which has a direct analogy with the propagation of light in a medium with a random refractive index. | Session 1: 2D Heterostructures: Graphene Superlattices and Moire Effects |

10 | Fragile Insulator and Electronic Nematicity in a Graphene Moiré System* | Chen, Lei; Hu, Haoyu; Si, Qimiao | We propose the fragile insulator and the accompanying bad metal as competing states at integer fillings that analogously anchor the overall phase diagram of the correlated moiré systems and beyond. | Session 1: 2D Heterostructures: Graphene Superlattices and Moire Effects |

11 | Photocurrent spectroscopy study of the gap opening in graphene/hBN moiré superlattice | Han, Tianyi; Wang, Lei; Watanabe, Kenji; Taniguchi, Takashi; Ju, Long | Here, I will present our study of the gap opening in graphene/hBN moiré system by photocurrent spectroscopy. | Session 1: 2D Heterostructures: Graphene Superlattices and Moire Effects |

12 | Absence of back-scattering in twisted bilayer graphene with disorder | Sainz-Cruz, Hector; Cea, Tommaso; Pantaleon, Pierre; Guinea, Francisco | For the calculation of the conductivity through a region with disorder, we develop a decimation technique in the spirit of [2], which yields the pristine electrodes self-energies. | Session 2: 2D Heterostructures: Twisted Bilayers |

13 | Intrinsic Bandgap in Twisted Doublebilayer graphene due to Crystal Fields | Zheng, Giulia; Rickhaus, Peter; Portoles, Elias; De Vries, Folkert; Tomic, Petar | Here, we present an additional parameter: the crystal field. | Session 2: 2D Heterostructures: Twisted Bilayers |

14 | Gate-tunable topological flat bands in twisted monolayer-bilayer graphene | Park, Youngju; Chittari, Bheema Lingam; Jung, Jeil | We investigate the band structure of twisted monolayer-bilayer graphene (tMBG) trilayers, or twisted graphene on bilayer graphene, as a function of twist angles and perpendicular electric fields in search of optimal conditions for achieving isolated nearly flat bands. | Session 2: 2D Heterostructures: Twisted Bilayers |

15 | Moiré metrology of energy landscapes in van der Waals heterostructures | Halbertal, Dorri; Finney, Nathan; Sunku, Sai; Kerelsky, Alexander; Rubio Verdú, Carmen; Shabani, Sara; Xian, Lede; Carr, Stephen; Chen, Shaowen; Zhang, Charles; Wang, Lei; Gonzalez-Acevedo, Derick; McLeod, Alexander; Rhodes, Daniel; Watanabe, Kenji; Taniguchi, Takashi; Kaxiras, Efthimios; Dean, Cory; Hone, James; Narayan, Abhay; Kennes, Dante; Rubio, Angel; Basov, Dmitri | In this work we introduce moiré metrology as a combined experiment-theory framework to probe the stacking energy landscape of bilayer structures at the 0.1 meV/atom scale, outperforming the gold-standard of quantum chemistry. | Session 2: 2D Heterostructures: Twisted Bilayers |

16 | A moiré superlattice on the surface of a topological insulator | Wilson, Justin; Cano, Jennifer; Fang, Shiang; Pixley, Jed | We investigate the surface state of a topological insulator subject to a moiré superlattice potential. | Session 2: 2D Heterostructures: Twisted Bilayers |

17 | Nanoscale Lattice Dynamics in Hexagonal Boron Nitride Moiré Superlattices | Moore, Samuel; Halbertal, Dorri; Ciccarino, Christopher; McGilly, Leo; Finney, Nathan; Yao, Kaiyuan; Ni, GuangXin; Shao, Yinming; Sternbach, Aaron; Telford, Evan; Kim, Brian; Narayan, Abhay; Dean, Cory; Hone, James; Fogler, Michael; Narang, Prineha; Schuck, P; Basov, Dmitri | Here, we present a deterministic procedure for obtaining large-area moiré hexagonal boron nitride (hBN) domains. | Session 2: 2D Heterostructures: Twisted Bilayers |

18 | Quantum Anomalous Hall Effect of Twisted Bilayer Graphene/Hexagonal Boron Nitride Double-Moiré Structures | Shi, Jingtian; Zhu, Jihang; MacDonald, Allan | I will present a study of the QAHE of tBG/hBN trilayers using a double-moiré model. | Session 2: 2D Heterostructures: Twisted Bilayers |

19 | Optical Susceptibility Tuning in Twisted Bilayer Insulators | Smith, Andrew; Wang, Chong; Xiao, Di | Removing the signal of the uncoupled bilayer, we discuss the change in response due to the twist induced chiral interlayer coupling. | Session 2: 2D Heterostructures: Twisted Bilayers |

20 | Reconstruction of moiré lattices in twisted transition metal dichalcogenide bilayers | Maity, Indrajit; Jain, Manish; Maiti, Prabal; Krishnamurthy, Hullikal | Here, we propose novel structures for twisted bilayer of transition metal dichalcogenides (TMDs). | Session 2: 2D Heterostructures: Twisted Bilayers |

21 | Unconventional ferroelectricity in moiré heterostructures | Zheng, Zhiren; Ma, Qiong; Bi, Zhen; de la Barrera, Sergio; Liu, Ming-hao; Mao, Nannan; Zhang, Yang; Kiper, Natasha; Watanabe, Kenji; Taniguchi, Takashi; Kong, Jing; A. Tisdale, William; Ashoori, Raymond; Gedik, Nuh; Fu, Liang; Xu, Suyang; Jarillo-Herrero, Pablo | Here, we report on our observation of switchable ferroelectricity in graphene-based moiré vdW heterostructures. | Session 2: 2D Heterostructures: Twisted Bilayers |

22 | Electron-hole asymmetry and band gaps of commensurate double moiré patterns in twisted bilayer graphene on hexagonal boron nitride | Shin, Jiseon; Park, Youngju; Chittari, Bheema Lingam; Jung, Jeil | Here we show that tBG/BN commensurate double moiré patterns can be classified into two types, each favoring the narrowing of either the conduction or valence bands on average, and obtain the evolution of the bands as a function of the interlayer sliding vectors and electric fields. | Session 2: 2D Heterostructures: Twisted Bilayers |

23 | Interactions of topological and correlated states in twisted monolayer–bilayer graphene | Zhou, Zhang; Li, Siyu; Wang, Zhengwen; Xue, Yucheng; Jiang, Yuhang; Mao, Jinhai | Here we mainly focus on the novel transport properties emerging in the interactions among electrons and the topology of their band structure. | Session 2: 2D Heterostructures: Twisted Bilayers |

24 | Insights on Photochemical Processes in the Strong Coupling Regime by Atomistic Simulations | Corni, Stefano | In collaboration with the group of G. Granucci and M. Persico, we have developed an atomistic computational methodology [1] that extends to polaritonic chemistry a well-established semiclassical approach developed for photochemical processes [2]. | Session 3: Ab-initio studies and novel effects of strong light-matter coupling in molecular, two-dimensional and solid-state systems |

25 | Coupled cluster theory for molecular polaritons | Haugland, Tor; Ronca, Enrico; Kjønstad, Eirik; Schaefer, Christian; Rubio, Angel; Koch, Henrik | I will present our recently developed ab initio correlated approach to study molecules that interact strongly with quantum fields in an optical cavity. | Session 3: Ab-initio studies and novel effects of strong light-matter coupling in molecular, two-dimensional and solid-state systems |

26 | Towards a detailed understanding of strong light-matter coupling effects | Ruggenthaler, Michael | In this talk I will discuss the fundamental setting for such ab-initio methods, the Pauli-Fierz quantum field theory in Coulomb gauge [1], highlight subtle yet important issues (bare masses of the particles) and introduce a hierachy of approximations in first-principles approaches [2,3]. | Session 3: Ab-initio studies and novel effects of strong light-matter coupling in molecular, two-dimensional and solid-state systems |

27 | Co-operative Vibrational Strong Coupling: A New Route to Control Chemical Reactions | George, Jino | Here, we show an efficient way of controlling chemical reactions by co-operative vibrational strong coupling (Co-VSC). | |

28 | Theory of collective cavity dynamics for cold chemistry and materials science | Pupillo, Guido | In this talk we focus on collective light matter interactions in the limit of vanishingly small photon numbers: Coupling matter to the vacuum electromagnetic field of a cavity – i.e. passively – can lead to permanent changes in the material due to the combined effects of vacuum hybridization, long-range cavity-mediated and direct couplings between material constituents. | |

29 | Non-thermal pathways to non-equilibrium control of correlated quantum materials | Claassen, Martin | In this talk, I will discuss avenues and challenges in how tailored light fields can provide a non-thermal handle to manipulate, induce and probe novel electronic or magnetic phases in strongly correlated materials. | |

30 | Different MXenes but the same surface | Ibragimova, Rina; Rinke, Patrick; Komsa, Hannu-Pekka | We consider the most popular MXene systems such as Ti 2C, Ti 3C 2, Ti 2N, Ti 4N 3, Nb 2C, and Nb 4C 3. | Session 4: Adsorption and Dopants in 2D Materials |

31 | Interaction Energies of Helium Atoms Adsorbed on Graphene | Lauricella, Ethan; Kotov, Valeri; Del Maestro, Adrian; Vanegas, Juan | We use density functional theory (DFT) calculations to characterize the interaction energy of helium atoms adsorbed on a graphene substrate. | Session 4: Adsorption and Dopants in 2D Materials |

32 | Nanoporous 2D Materials Built from Organic Molecules and their Application in Gas Separation | Moses, Isaiah; Barone, Veronica | In the present work, a number of organic molecules − benzene, borazine, pyridine, 1,3-diazine, 1,3,5-triazine, phosphinine and arsinine − have been used to build nanoporous atomically thin 2D materials [1]. | Session 4: Adsorption and Dopants in 2D Materials |

33 | Scanning tunneling microscopy and electronic transport of gold-decorated graphene devices | Riffle, Jake; Arias, Steven; Hollen, Shawna | Using a low temperature scanning tunneling microscope (STM) on graphene field effect transistors, we present simultaneous STM and electronic transport measurements of graphene devices decorated with gold adatoms. | Session 4: Adsorption and Dopants in 2D Materials |

34 | Disordered hyperuniform networks and their application in atomic-scale low-dimensional materials | Chen, Duyu; Zheng, Yu; Liu, Lei; Zhang, Ge; Chen, Mohan; Jiao, Yang; Zhuang, Houlong | In this work we present a series of research centered around a new concept called "disordered hyperuniform quantum materials", i.e., disordered hyperuniform atomic-scale low-dimensional materials where quantum effects are significant. | Session 4: Adsorption and Dopants in 2D Materials |

35 | Spectroscopic Characterization and Molecular Dynamics Simulation of Pristine and Functionalized Graphene nanoplatelets (GnPs) | Farinre, Olasunbo; Chowdhury, Sugata; Misra, Prabhakar | We have used Raman, SEM, FTIR and XRD techniques for structural and spectroscopic characterization of pristine and functionalized GnPs (with carboxyl). | Session 4: Adsorption and Dopants in 2D Materials |

36 | Phase stability and Raman/IR signatures of Ni-doped MoS2 from DFT studies | Guerrero, Enrique; Karkee, Rijan; Strubbe, David | We use density functional theory calculations to determine the structure, mechanical properties, electronic properties, and formation energies of bulk Ni-doped MoS 2 while varying the doping concentration. | Session 4: Adsorption and Dopants in 2D Materials |

37 | Structural studies of Ni-doped MoS2 monolayers and polytypes using density functional theory | Karkee, Rijan; Guerrero, Enrique; Strubbe, David | We study the structure and properties of Ni-doped MoS 2 in the 1H and 1T monolayer and 2H and 3R bulk polytypes, using density functional theory. | Session 4: Adsorption and Dopants in 2D Materials |

38 | The local quantum cluster typical medium approach for disordered systems. | Moilanen, Aric; Tam, Ka-Ming; Mondal, Wasim; Wang, Yang; Eisenbach, Markus; Chioncel, Liviu; Dobrosavljevic, Vladimir; Terletska, Hanna | We performed a careful systematic analysis of the new local quantum cluster ansatz for both the box and binary disorder distributions in the three-dimensional Anderson model. | Session 4: Adsorption and Dopants in 2D Materials |

39 | Revealing the strong coupling of atomic motion to interlayer excitons through photocurrent imaging at room temperature. | Arp, Trevor; Barati, Fatemeh; Su, Shanshan; Lake, Roger; Song, Justin; Rudner, Mark; Aji, Vivek; Gabor, Nathaniel | Surprisingly, we show that a heterostructure composed of stacked layers exhibits interlayer excitons that are strongly coupled to atomic vibrational motion. | Session 4: Adsorption and Dopants in 2D Materials |

40 | Exciton and trion photoluminescence evolution in 2D MoS2 treated with controlled thermal annealing | Mastrippolito, Dario; Palleschi, Stefano; D’Olimpio, Gianluca; Politano, Antonio; Nardone, Michele; Benassi, Paola; Ottaviano, Luca | MoS 2, isolated into the monolayer phase, is the subject of intense research works due to its rich physics and unique excitonic properties. | Session 4: Adsorption and Dopants in 2D Materials |

41 | Studying magnetic and defect properties of two-dimensional NiI2 layers | Wang, Luqing; Zhou, Qunfei; Lebedev, Dmitry; Hersam, Mark; Darancet, Pierre; Chan, Maria | In this work, we perform density functional theory (DFT) calculations to investigate the magnetic properties and defect effects of two-dimensional NiI 2 layers. | Session 4: Adsorption and Dopants in 2D Materials |

42 | Methane Adsorption on MoS2 Surfaces | Gallaba, Dinuka; Russell, Brice; Walber, Aaron; Jayasekera, Thushari; Migone, Aldo; Talapatra, Saikat | Here, we will present our combined investigation of volumetric adsorption measurement as well as Density Functional Theory (DFT) calculation results of adsorption of Methane on MoS 2 surfaces. | Session 4: Adsorption and Dopants in 2D Materials |

43 | Electronic, vibronic, and magnetic properties of a carbon radical anion in 2D WS2 | Cochrane, Katherine; Lee, Jun-Ho; Kastl, Christoph; Haber, Jonah; Zhang, Tianyi; Kozhakhmetov, Azimkhan; Robinson, Joshua; Terrones, Mauricio; Repp, Jascha; Neaton, Jeffrey; Weber-Bargioni, Alexander; Schuler, Bruno | Here we use scanning tunneling microscopy and spectroscopy (STM/S) and CO functionalized tip atomic force microscopy (AFM) in combination with ab initio calculations to characterize a carbon point defect in WS 2. | Session 4: Adsorption and Dopants in 2D Materials |

44 | A first-principles study of graphene sheets with metal dimer defects | Bhatt, Mahesh; Kim, Gunn | In this study, we used VASP to explore the electronic structure of the defective graphene systems. | Session 4: Adsorption and Dopants in 2D Materials |

45 | LeRoy Apker Award (2019): Dynamics of the Outer Solar System, from Neptune to Planet Nine | Khain, Tali | In this talk, we will analyze the orbital dynamics of the Kuiper belt objects (KBOs) both with numerical simulations and with a theoretical Hamiltonian approach. | Session 5: Apker Award Session |

46 | LeRoy Apker Award (2020): Stochastic resonance enhancement of the resolution of charge coupled device based thermoreflectance imaging | Koskelo, Elise; Radunskaya, Ami; Hudgings, Janice | Here, we develop an experimentally validated analytical and computational model of the stochastic resonance in this system, investigating how measurement noise, when combined with the averaging required by the imaging algorithm, can be used to maximize the thermal resolution. | Session 5: Apker Award Session |

47 | LeRoy Apker Award (2020): The strange, but not-so-bad, metallic state of the electron-doped cuprates | Poniatowski, Nicholas | In this talk, we will discuss the transport phenomenology of electron-doped cuprates, which proves to be much richer than the mere existence of the linear-in-temperature resistivity for which hole-doped cuprates are notorious. | Session 5: Apker Award Session |

48 | Electronic transport properties of low dimensional materials for ultrasensitive chemical sensors | Abarashi, Maryam; Ferreira, Mauro S.; Gomes da Rocha, Claudia | In this work, we obtain the electronic transport properties of low dimensional materials to improve sensitivity and selectivity features of nanoscale chemical sensors. | Session 6: Applications of 2D Systems |

49 | Characteristic Features of 1/f Noise in Graphene Field-Effect Transistor Photodetectors | Henschel, Zachary; Wang, Yifei; Vinh, Ho; Pradhan, Prashant; Cooney, Michael; Nguyen, Vinh | The graphene field-effect mobility and low frequency 1/f noise are investigated in this study. | Session 6: Applications of 2D Systems |

50 | Designing Interconnects Based on Graphene Nanoribbon Junctions | Cernevics, Kristians; Yazyev, Oleg | We systematically address the electronic transport properties of 60° and 120° angled junctions connecting a pair of GNR leads of identical width and chirality that can be produced by means of the bottom-up synthesis. | Session 6: Applications of 2D Systems |

51 | Plasmonically enhanced mid-IR light source based on tunable spectrally and directionally selective thermal emission from nanopatterned graphene | Shabbir, Muhammad Waqas; Leuenberger, Michael | We present a proof of concept for a spectrally selective thermal mid-IR source based on nanopatterned graphene (NPG). | Session 6: Applications of 2D Systems |

52 | Ultrasensitive mid-IR photodetector based on hybrid graphene and phase-changing vanadium oxide heterostructure operating above room temperature | Shabbir, Muhammad Waqas; Leuenberger, Michael | We present the model of an ultrasensitive mid-infrared (mid-IR) photodetector consisting of a hybrid heterostructure made of nanopatterned graphene (NPG) and vanadium dioxide (VO 2) which exhibits a large responsivity of exceeding R=10 4 eV, a detectivity exceeding 10 10, and a sensitivity in terms of noise-equivalent power (NEP) lower than 100 fW/sqrt(Hz) above room temperature by taking advantage of the phase change of a 3 nm thin VO 2 sheet. | Session 6: Applications of 2D Systems |

53 | Observation of Aharonov-Bohm interference in graphene Fabry-Pérot quantum Hall interferometers | Werkmeister, Thomas; Ronen, Yuval; Haei Najafabadi, Danial; Pierce, Andrew; Ehrets, James; Zibrov, Alexander; Watanabe, Kenji; Taniguchi, Takashi; Yacoby, Amir; Kim, Philip | Here, we use hBN-encapsulated monolayer graphene with top and bottom graphite gates to electrostatically define tunable Fabry-Pérot interferometers. | Session 6: Applications of 2D Systems |

54 | Modeling of Graphene-Semiconductor Heterostructure Photodetectors | Howe, Leslie; Vinh, Ho; Wang, Yifei; Nguyen, Vinh; Cooney, Michael | A model of the photoconductive mechanism is proposed showing that the photo-response for the devices is the modulation of the conducting surface due to the changing of the surface depletion layer. | Session 6: Applications of 2D Systems |

55 | Gate-tunable Quantum Interferences in Monolayer Graphene PN Junctions | Zhang, Xi; Tsai, Kan-Ting; Luo, Yujie; Wang, Ke | Here we demonstrate preliminary experimental observations of quantum interferences based on these concepts. | Session 6: Applications of 2D Systems |

56 | Transfer Matrix Approach For Plasmon Scattering In Closely Packed 1D Graphene Structures | Semenenko, Viacheslav; Liu, Mengkun; Perebeinos, Vasili | We present a comprehensive study of graphene plasmon eigenmodes in 1D periodic structures formed by plasmonic junctions of different types [1]. | Session 6: Applications of 2D Systems |

57 | Nanometric Cavities for Mid-infrared Light Using Graphene Plasmons | Epstein, Itai; Koppens, Frank | We introduce a new approach to create nanoscale cavities for GPs by depositing nanometric silver cubes over the graphene [3]. | Session 6: Applications of 2D Systems |

58 | Atomically precise, custom-design origami graphene nanostructures | Chen, Hui; Zhang, Xianli; Zhang, Yu-Yang; Wang, Dongfei; Bao, Deliang; Du, Shixuan; Ouyang, Min; Pantelides, Sokrates; Gao, Hongjun | In this talk, we will report that graphene origami is an efficient way to convert graphene into atomically precise, complex nanostructures. | Session 6: Applications of 2D Systems |

59 | Bilayer Photonic Graphene | Oudich, Mourad; Su, Guangxu; Deng, Yuanchen; Benalcazar, Wladimir; Gerard, Nikhil; Lu, Minghui; Zhan, Peng; Jing, Yun | Drawing inspiration from the twisted bilayer graphene (TBG), we introduce a photonic bilayer analog consisting of two stacked graphene-like photonic crystals (PC) that support spoof surface plasmons. | Session 6: Applications of 2D Systems |

60 | Quantized resistance behavior in graphene Corbino p-n junction devices | Rigosi, Albert; Liu, Chieh-I; Scaletta, Dominick; Hill, Heather; Levy, Antonio; Patel, Dinesh; Kruskopf, Mattias | Here we report quantized resistances in epitaxial graphene Corbino p-n junction devices held at the v=2 plateau (about 12.9 kΩ) that agree with numerical simulations performed with the LTspice circuit simulator. | Session 6: Applications of 2D Systems |

61 | Fabrication of Plasmonic Nanoplatforms for Single-molecule Detection and Self-Cooling Nearfield Thermal Emission Device | Choi, Seong-Soo; Park, Myoung Jin; Lee, Yong Min; Kim, Kyung Jin; Bae, Byung Seong; Kim, Hyun Tae; Choi, Soo Bong | We are investigating the characteristics for the fabricated nanometer slit array and circular-type aperture array, and the fabricated plasmonic platfoms can be utilized as various applications such as plasmonic sensors and plasmomic self- cooling due to its broad emission spectra from the visible to the infrared regime. | Session 7: Applied Thin Film, Interface, and Surface Science |

62 | Characterization of the Reflectance Distribution Function of Low Reflectivity Surfaces in the Infrared Region | Tablett, Nicolas; Doan, Luan; Mahan, James; Nguyen, Vinh | By employing directional scatter analysis to the experimental data, we have provided a simulation for the bidirectional reflectance property of the coating surface. | Session 7: Applied Thin Film, Interface, and Surface Science |

63 | Theoretical and Experimental Investigation of Surface Resistivity of Yttrium Stabilized Zirconium as a Thin Film | Melfi, Matthew; Tuttle, Sarah; Arsharuni, Stephane; De Castro, Vincent; Sahiner, Mehmet | We will use Zr, Al2O3, and Si substrates for the YSZ films, and compare the properties of the YSZ layer. | Session 7: Applied Thin Film, Interface, and Surface Science |

64 | Dynamical theory analysis of X-ray patterns from nanostructured substrates | Rahmaninejad, Hadi; Freychet, Guillaume; Zhernenkov, Mikhail; Ashkar, Rana | Here, we extend this approach to off-specular x-ray scattering. | Session 7: Applied Thin Film, Interface, and Surface Science |

65 | A Novel Type of Water Desalination Technology Using MoS2-Based Thin Films for Selective Ion Transport. | Marcus, Gabriel; Carroll, David | A Novel Type of Water Desalination Technology Using MoS2-Based Thin Films for Selective Ion Transport. | Session 7: Applied Thin Film, Interface, and Surface Science |

66 | Surface-Enhanced Nonreciprocal Response in Iron Garnets | Dash, Sushree; Levy, Miguel; Haskel, Daniel; Mukherjee, Pinaki; Rosenberg, Richard | We will present a surface- reconstruction analysis of Bi-substituted magneto-optic films conducted via scanning-transmission-electron microscopy (STEM). | Session 7: Applied Thin Film, Interface, and Surface Science |

67 | Unveiling Interfacial Properties of Surfactant Assemblies Mimicking Healthy and Diseased States in Lung Membranes | Porras-Gomez, Marilyn; Leal, Cecilia | We performed structural and mechanical characterization by GISAXS, AFM and Fast Force Mapping on lipid-based mimicking pulmonary membranes in healthy and diseased states. | Session 7: Applied Thin Film, Interface, and Surface Science |

68 | A revised three-dimensional electron gas model to describe surface plasmonic phenomena | Kong, Jiantao | In other words, a revised 3D electron gas model can predict and describe surface plasmonic phenomena by itself. | Session 7: Applied Thin Film, Interface, and Surface Science |

69 | Heating of inhomogeneous electron flow in the hydrodynamic regime: Current-inducedtemperature asymmetry | Gornyi, Igor; Kachorovskii, Valentin; Tikhonov, Konstantin; Zhang, Gu | In this paper, we consider a circular-shape constriction where the inhomogeneity decays exponentially from its center. | Session 7: Applied Thin Film, Interface, and Surface Science |

70 | Modeling and fabrication of a PTE THz mixer on epitaxial graphene | POOJALI, JAYAPRAKASH; Joint, Francois; Daniels, Kevin; Zhang, Kunyi; Ali, Ashraf; Murphy, Thomas; Drew, Howard | In this work, we describe an accurate computer modeling and optimized fabrication process flow for the mixers on an epitaxial graphene platform. | Session 7: Applied Thin Film, Interface, and Surface Science |

71 | Surface acoustic waves with transverse electric field | Wang, Zongye | In particular, we develop a theory of elastic waves coupled with a general electromagnetic field and find the eigenmodes of the coupled wave. | Session 7: Applied Thin Film, Interface, and Surface Science |

72 | The structural impact of sintered and flame-synthesized Li ceramics on ionic conductivity in solid battery electrolytes | Okoli, Ugochukwu; Cui, Xuemei; Rishi, Kabir; Gogia, Ashish; Temeche, Eleni; Laine, Richard; Beaucage, Greg | In this study, we attempt to explore the structural impact on ionic conductivity in solid electrolytes for both sintered and flame-synthesized Li ceramic particles | Session 7: Applied Thin Film, Interface, and Surface Science |

73 | AFM Additive Nanopatterning on Ionic Liquid Monolayer-Decorated Surfaces by Combined Mechanical and Electrical Stimuli | Li, Zixuan; Mangolini, Filippo; Sadowski, Jerzy; Bearba, Raluca; Jarvis, Karalee; Morales-Collazo, Oscar; Dolocan, Andrei; Brennecke, Joan | Common AFM lithography techniques usually exploit the meniscus formed around the tip-substrate contact to dissolve and transfer the reactants for surface patterning. | Session 7: Applied Thin Film, Interface, and Surface Science |

74 | SiGeSn photonics at MIR wavelengths | Assali, Simone; Atalla, Mahmoud; Attiaoui, Anis; Koelling, Sebastian; Daligou, Gérard; Moutanabbir, Oussama | In this presentation, the recent progress in the non-equilibrium epitaxial growth of metastable (Si)GeSn semiconductors in a CVD reactor will be discussed. | Session 7: Applied Thin Film, Interface, and Surface Science |

75 | Interfacial Ferroelectricity by van-der-Waals Sliding | Vizner, Maayan; Waschitz, Yuval; Cao, Wei; Nevo, Iftach; Watanabe, Kenji; Taniguchi, Takashi; Sela, Eran; Urbakh, Michael; Hod, Oded; Ben Shalom, Moshe | In this talk I will discuss the origin of the effect in hexagonal-boron-nitride and discuss the switching mechanism for this new ferroelectric material. | Session 8: Artificially Structured Materials: Growth, Structure, and Electronic Properties |

76 | Interfacial Ferroelectricity by van der Waals Sliding | Vizner, Maayan; Waschitz, Yuval; Cao, Wei; Nevo, Iftach; Watanabe, Kenji; Taniguchi, Takashi; Sela, Eran; Urbakh, Michael; Hod, Oded; Ben Shalom, Moshe | In the talk, I will describe how does the breaking of inversion symmetry in a bilayer hexagonal Boron Nitride causes two out-of-plane polarized states, and show how does 1.4-angstrom shift between the two layers can switch the polarization. | Session 8: Artificially Structured Materials: Growth, Structure, and Electronic Properties |

77 | Electronically reconfigurable complex-oxide heterostructure free-standing membranes | Yu, Muqing; Eom, Kitae; Seo, Jinsol; Yang, Dengyu; Lee, Hyungwoo; Lee, Jungwoo; Irvin, Patrick; Oh, Sang Ho; Levy, Jeremy; Eom, Chang-Beom | Here we report the synthesis of free-standing LAO/STO membranes which can be directly integrated with other materials via van der Waals stacking. | Session 8: Artificially Structured Materials: Growth, Structure, and Electronic Properties |

78 | Monolithically integrated GaN nanoscale air channel field emission diode and transistor | SAPKOTA, KESHAB; Talin, Albert; Leonard, Francois; Kazanowska, Barbara; Jones, Kevin; Gunning, Brendan; Wang, George | We will present results for the design and characteristics of field emission diodes and transistor at various nanogap sizes and operating pressures. | Session 8: Artificially Structured Materials: Growth, Structure, and Electronic Properties |

79 | Electronic Structure of Mixed-Dimensional Heterojunctions from Optimally-Tuned Range-Separated Hybrid Functionals | Zhou, Qunfei; Liu, Zhenfei; Darancet, Pierre | Here we study the electronic structure of 0D-2D (metallophthalocyanines-MoS 2) heterojunctions by density functional theory calculations, using optimally tuned range-separated hybrid functionals. | Session 8: Artificially Structured Materials: Growth, Structure, and Electronic Properties |

80 | Epitaxial Growth of Superlattices of Co2MnSi, Fe2MnSi, and Co2FeSi Heusler Compounds | Tsui, Frank; Fenwick, Ethan | Epitaxial growth via atomic layer-by-layer sequential deposition of various stacking sequences (e.g. the Heusler L2 1 and “inverse” Heusler) with superlattice periods of 1, 1.5, and 2 unit cell of the constituent crystals, and the corresponding surface structures and morphology were studied in real time using scanning RHEED technique. | Session 8: Artificially Structured Materials: Growth, Structure, and Electronic Properties |

81 | Tuning the Electronic Structure of Two-Dimensional Materials through Molecular Assembly | Zhou, Qunfei; Anaclet, Bukuru; Steiner, Trevor; Kotiuga, Michele; Darancet, Pierre | In this work, inspired by recent progresses in molecular assembly and in two-dimensional (2D) device synthesis, we examine how organic molecules can be used to tune the electronic structure of 2D materials through higher moments of their charge densities. | Session 8: Artificially Structured Materials: Growth, Structure, and Electronic Properties |

82 | Localized eigenstates in one-dimensional quasiperiodic and limit-periodic potentials | Zheng, Chongbin; Socolar, Joshua | We study the single-particle eigenstates of ordered, nonperiodic potentials in one dimension, focusing on the scaling of the inverse participation rate (IPR) of the ground state with the overall amplitude of the potential. | Session 8: Artificially Structured Materials: Growth, Structure, and Electronic Properties |

83 | Hidden dualities in 1D quasiperiodic models | Gonçalves, Miguel; Amorim, Bruno; Castro, Eduardo; Ribeiro, Pedro | We propose that Anderson localization-delocalization transitions in generic 1D quasiperiodic models are associated with local hidden duality symmetries. | Session 8: Artificially Structured Materials: Growth, Structure, and Electronic Properties |

84 | Spin-structure on the surface of a sphere | Nematollahi, Delaram | We explore the possibility of novel manybody states in this system by constructing variational wavefunctions using both a Hartree-Fock approach and by a physically motivated ansatz. | Session 8: Artificially Structured Materials: Growth, Structure, and Electronic Properties |

85 | Physics of Strain Engineered Minigaps in III-V Digital Alloys | Ahmed, Sheikh; Zheng, Jiyuan; Campbell, Joe; Tan, Yaohua; Ghosh, Avik | In this talk, we discuss the physics of these minigaps and their correlation with strain. | Session 8: Artificially Structured Materials: Growth, Structure, and Electronic Properties |

86 | InGaAs Quantum Dot Growth on InAs(111) and GaSb(111) with Molecular Beam Epitaxy | Vallejo, Kevin; Garrett, Trent; Liang, Baolai; Simmonds, Paul | In this study we have mapped the growth parameters for optimal homoepitaxy of InAs on InAs(111)A substrates using molecular beam epitaxy. | Session 8: Artificially Structured Materials: Growth, Structure, and Electronic Properties |

87 | Growth and characterization of type-II CdTe quantum dots in a ZnCdSe matrix for the use in an intermediate band solar cell | Deligiannakis, Vasilios; Ranepura, Gehan; Begliarbekov, Milan; Kuskovsky, Igor; Tamargo, Maria | Here we report on the growth and characterization of CdTe fractional monolayer QDs embedded in a ZnCdSe host matrix grown by a combination of migration enhanced epitaxy (MEE) and molecular beam epitaxy. | Session 8: Artificially Structured Materials: Growth, Structure, and Electronic Properties |

88 | Decoding the structure–property relationships of quasi-two-dimensional semiconductor nanoplatelets | Mazzotti, Sergio; Greenwood, Arin; Norris, David; Galli, Giulia | We focus on CdSe NPLs passivated by chloride ligands, and we use many body perturbation theory at the G 0W 0 level and solve the Bethe Salpeter equation to obtain electronic and excitonic properties. | Session 8: Artificially Structured Materials: Growth, Structure, and Electronic Properties |

89 | Nanoporous Metal Foams as Efficient Particulate Filters | Malloy, James; Quintana, Alberto; Liu, Kai | We have achieved metallic foams with tunable porosity and density (0.1%-30% of bulk density)[1] using electrochemical methods, with strong mechanical stability. | Session 8: Artificially Structured Materials: Growth, Structure, and Electronic Properties |

90 | First-Principle Studies on Magneto-Optical Anisotropy of Fex/Cux Superlattice | Arifin, Muhammad; Nakamura, Kohji | Here, we present our study of magneto-optical anisotropy (MOA) in Fe x/Cu x superlattice, where x is the number of atomic-layers, based on first-principle study. | Session 9: Artificially Structured Materials: Optical Phenomena and Plasmons |

91 | Photoluminescence study of carrier localization and recombination in nearly strain-balanced non-polar m-plane InGaN/AlGaN superlattices | Cao, Yang; Dzuba, Brandon; Magill, Brenden; Senichev, Alexander; Nguyen, Trang; Diaz, Rosa; Manfra, Michael; McGill, Stephen; Garcia, Carlos; Khodaparast, Giti; Malis, Oana | Photoluminescence study of carrier localization and recombination in nearly strain-balanced non-polar m-plane InGaN/AlGaN superlattices | Session 9: Artificially Structured Materials: Optical Phenomena and Plasmons |

92 | Bound states in the continuum of eigenmodes guided by a lamellar grating sandwiched between two dielectric media | Reynolds, Cole; Kocharovsky, Vladimir; Kocharovsky, Vitaly | Here, we apply a powerful analytic theory of mode coupling in optical gratings, that we proposed in Phys. | Session 9: Artificially Structured Materials: Optical Phenomena and Plasmons |

93 | Engineering dimensionality of resonant many-body dipole-dipole interactions using a nanophotonic environment. | Boddeti, Ashwin; Guan, Jun; Cortes, Cristian; Sentz, Tyler; Juarez, Xitali; Odom, Teri; Jacob, Zubin | To this end, we present a systematic study of the fluorescent decay profile of donor (Alq3) and acceptor (R6G) molecules spin-coated on a plasmonic metasurface consisting of 2D silver nanoparticle lattice. | Session 9: Artificially Structured Materials: Optical Phenomena and Plasmons |

94 | Measurement of χ(2) of III-V quantum well structures | Foster, Natalie; Rockwell, Ann Kathryn; McArthur, Joshua; Mendoza Santoyo, Bernardo; Bank, Seth; Downer, Michael | A digital alloys growth technique was used, which avoids phase segregation that often plagues III-V alloy growth, and allows nano-structuring to enhance χ (2). | Session 9: Artificially Structured Materials: Optical Phenomena and Plasmons |

95 | Ultrafast sub-bandgap photo-response in ErAs/GaAs at 1550 nm | Zhang, Kedong; Li, Yiwen; Ding, Yuanfeng; Li, Chen; Li, Jianfei; Meng, Yafei; Deng, Yu; Wang, Fengqiu; Lu, Hong; Chen, Yan-Feng | In this study, we present different ways to integrate ErAs and GaAs and utilize the absorption within the GaAs bandgap to realize ultrafast photo-response at 1550 nm. | Session 9: Artificially Structured Materials: Optical Phenomena and Plasmons |

96 | Effect of Fabrication Methods of Amorphous Silicon on the Ultrafast Dynamics of Dielectric Metasurfaces | Tiwari, Uddhab; Appavoo, Kannatassen | We demonstrate how various fabrication methods of amorphous silicon can drastically modify the ultrafast optical properties of dielectric metasurfaces. | Session 9: Artificially Structured Materials: Optical Phenomena and Plasmons |

97 | Broadband cloaking using 3D nano-assembled plasmonic meta-structures | Khan, Imran; Ghosh, Sayantani; D.Kim, Arnold | We have developed a model 1 to calculate the efficiency of scattered light when a spherical homogenous bare core is covered by a shell comprising a randomly-ordered collection of metallic NPs. | Session 9: Artificially Structured Materials: Optical Phenomena and Plasmons |

98 | Parameter Controlled Percolation Effects in Transmittance of Plasmonic Checkerboard Structures | Dodge, Tyler; Kempa, Krzysztof | Here, we investigate the self-complimentary, plasmonic checkerboard structure and the relation to its percolation effects. | Session 9: Artificially Structured Materials: Optical Phenomena and Plasmons |

99 | Self-Assembled Multi-Phase Heterostructures for Enhanced Magneto-Optical Anisotropy | Wang, Xuejing; Jian, Jie; Wang, Haohan; Pachaury, Yash; Lu, Ping; Xu, Xiaoshan; El-Azab, Anter; Zhang, Xinghang; Wang, Haiyan | We use a bottom-up self-assembling synthesis method to integrate multifunctional phases as a nanopillar-in-matrix thin film heterostructure that realizes epitaxial quality, sharp atomic interface and large throughput. | Session 9: Artificially Structured Materials: Optical Phenomena and Plasmons |

100 | Broadband Optical Absorption Enhancement in Hybrid Organic-Inorganic Perovskite Metasurfaces | Wang, Chenzhe; Zhang, Zhifeng | In this work, by introducing nanohole arrays on HOIP ultrathin film, we achieve all-dielectric HOIP metasurfaces with broadband optical absorption enhancement. | Session 9: Artificially Structured Materials: Optical Phenomena and Plasmons |

101 | Visualizing band structure of Bloch polaritons | Li, Yutao; Xiong, Lin; Jung, Minwoo; Forsythe, Carlos; Zhang, Shuai; McLeod, Alexander; Dong, Yinan; Liu, Song; Watanabe, Kenji; Taniguchi, Takashi; Fogler, Michael; Edgar, James; Shvets, Gennady; Dean, Cory; Basov, Dmitri | We visualized the band structure of Bloch polaritons in a graphene-based polariton crystal by utilizing near-field imaging techniques to record the propagation of Bloch polaritons launched by nano-structured antennas. | Session 9: Artificially Structured Materials: Optical Phenomena and Plasmons |

102 | Confined low-frequency plasmonic paves in multicoaxial NIM cables | Kushwaha, Manvir; Djafari-Rouhani, Bahram | We report on the surface plasmon excitations in the multicoaxial, negative-index metamaterials (NIM) cylindrical canles — using an elegant response function theory, which does not require matching of the messy boundary conditions. | Session 9: Artificially Structured Materials: Optical Phenomena and Plasmons |

103 | Controlling a quadratic band touching with an incommensurate potential | Lee, Junhyun; Pixley, Jed | We combine analytical and numerical methods to examine the properties of the reconstructed quadratic touching bands such as the effective mass and whether the system remains as a semimetal. | Session 10: Bandstructures of Twisted Bilayers |

104 | Flat Bands on Honeycomb Superlattices | Qi, Zihao; Bobrow, Eric; Li, Yi | We study the origin of the robustness of flat bands in the presence of local perturbations respecting lattice symmetry. | Session 10: Bandstructures of Twisted Bilayers |

105 | Inducing flat bands in two-dimensional materials by zone folding and hybridization | Ehlen, Niels; Hell, Martin; Marini, Giovanni; Profeta, Gianni; Grüneis, Alexander | We present a method to induce a flat band at the Fermi level of graphene by sandwiching it in between two ordered metal layers. | Session 10: Bandstructures of Twisted Bilayers |

106 | Multiorbital Flat Band Ferromagnetism with a Provable Percolation Representation | Bobrow, Eric; Zhang, Junjia; Li, Yi | We consider a two-layer multiorbital system consisting of a p x- and p y-orbital honeycomb lattice layer and an f y(3×2-y2)-orbital triangular lattice layer centered on the honeycomb plaquettes. | Session 10: Bandstructures of Twisted Bilayers |

107 | Super-moire lattices and flat bands in hBN encapsulated graphene | Covaci, Lucian; Andelkovic, Misa; Milovanovic, Slavisa; Peeters, Francois | We show that under certain conditions flat mini-bands can develop, making this system amenable to the appearance of strong correlations. | Session 10: Bandstructures of Twisted Bilayers |

108 | Γ-Valley Transition-Metal-Dichalcogenide Moirè Bands | Angeli, Mattia; MacDonald, Allan | In this talk, I will describe a recently developed continuum theory of the moirè minibands that are formed in the valence bands of Γ-valley homobilayers by a small relative twist. | Session 10: Bandstructures of Twisted Bilayers |

109 | An Exact Diagonalization Study of Twisted Bilayer Graphene at Integer Fillings: Phase Diagram | Xie, Fang; Cowsik, Aditya; Song, Zhida; Lian, Biao; Bernevig, Andrei; Regnault, Nicolas | We study the projected Hamiltonian with Coulomb interaction in the 8 flat bands of first magic angle twisted bilayer graphene using exact diagonalization. | Session 10: Bandstructures of Twisted Bilayers |

110 | An Exact Diagonalization Study of Twisted Bilayer Graphene at Integer Fillings: Charge Excitation | Cowsik, Aditya; Xie, Fang; Song, Zhida; Lian, Biao; Bernevig, Andrei; Regnault, Nicolas | Using exact diagonalization, we study the projected Hamiltonian with Coulomb interaction in the 8 flat bands of first magic angle twisted bilayer graphene. | Session 10: Bandstructures of Twisted Bilayers |

111 | The Plasmon Spectrum of Twisted Bilayer Graphene | Werner, Nicholas; Bill, Andreas | We summarize the relevant features of the continuum band structure with a focus on the flat moiré bands. | Session 10: Bandstructures of Twisted Bilayers |

112 | Incommensurability-induced sub-ballistic narrow-band-states in twisted bilayer graphene | Castro, Eduardo; Gonçalves, Miguel; Olyaei, Hadi; Amorim, Bruno; Mondaini, Rubem; Ribeiro, Pedro | Incommensurability-induced sub-ballistic narrow-band-states in twisted bilayer graphene | Session 10: Bandstructures of Twisted Bilayers |

113 | Twisted van der Waals Metamaterials | Gardezi, Syeda Minhal; Pirie, Harris; Carr, Stephen; Dorrell, William; Hoffman, Jenny | Here we present a simple platform to reproduce twistronic behavior using acoustic metamaterials made of interconnected air cavities in stacked steel plates [1]. | Session 10: Bandstructures of Twisted Bilayers |

114 | Soft modes in magic angle twisted bilayer graphene | Khalaf, Eslam; Bultinck, Nick; Vishwanath, Ashvin; Zaletel, Michael | We present a systematic study of the low-energy collective modes for different insulating states at integer fillings in twisted bilayer graphene. | Session 10: Bandstructures of Twisted Bilayers |

115 | Correlations in moiré heterostructures from atomistic modeling | Klebl, Lennart; Goodwin, Zachary; Mostofi, Arash; Lischner, Johannes; Honerkamp, Carsten; Kennes, Dante | We present how several of these phenomenæ found in different graphene-based multilayer structures can be explained from tight-binding models on the Ångström scale using realistic interactions. | Session 10: Bandstructures of Twisted Bilayers |

116 | Infrared absorption of gate-tuned twisted bilayer graphene | Choi, Eunjip | We report an infrared transmission measurement performed on electrically gated twisted bilayer graphene. | Session 10: Bandstructures of Twisted Bilayers |

117 | Accelerating Large-Scale Excited-State GW Calculations on Leadership Class HPC Systems | Del Ben, Mauro; Yang, Charlene; Li, Zhenglu; Da Jornada, Felipe; Louie, Steven; Deslippe, Jack | These techniques include the efficient use of accelerated libraries; asynchronous memory transfer, execution and overlap with MPI communication; batched operations; shared memory; and exploitation of high-performance memory to accelerate I/O. | Session 11: Building the Bridge to Exascale: Applications and Opportunities for Materials, Chemistry, and Biology |

118 | From LSMS to MuST: Large scale first principles materials calculations at the exascale | Eisenbach, Markus; Liu, Xianglin; Karabin, Mariia; ghosh, Swarnava; Wang, Yang; Terletska, Hanna; Mondal, Wasim; Tam, Ka-Ming; Zhang, Yi; Chioncel, Liviu | We present recent development of our Locally-selfconsistent Multiple Scattering (LSMS) code for scalable large scale first principles density functional calculations of materials. | Session 11: Building the Bridge to Exascale: Applications and Opportunities for Materials, Chemistry, and Biology |

119 | Recently Added Features, Scaling and Performance of the Real-Space MultiGrid (RMG) Code on Exascale Architectures | Briggs, Emil; Lu, Wenchang; Bernholc, Jerry | We describe the solutions to these problems implemented in RMG as well as the results for large scale ab-initio calculations that use the recently implemented features of RMG: hybrid functionals, semi-local pseudopotentials and spin orbit coupling. | Session 11: Building the Bridge to Exascale: Applications and Opportunities for Materials, Chemistry, and Biology |

120 | QMCPACK’s Exascale Performance Portability Strategies | Kent, Paul; Doak, Peter; Dewing, Mark; Luo, Ye | For real-space QMC algorithms we have adopted a new design and parallelization strategy in the Monte Carlo to increase the numerical work that can be exposed to the GPUs and to allow for the increase of asynchronous operations. | |

121 | A Pseudo-BCS Wavefunction from Density Matrix Decomposition: Application in Auxiliary-Field Quantum Monte Carlo | Xiao, Zhi-Yu; Shi, Hao; Zhang, Shiwei | We present a method to construct pseudo-BCS wave functions from the one-body density matrix. | |

122 | GPU-Acceleration of the ELPA2 Distributed Eigensolver for Applications in Electronic Structure Theory | Yu, Victor; Moussa, Jonathan; Kus, Pavel; Marek, Andreas; Messmer, Peter; Yoon, Mina; Lederer, Hermann; Blum, Volker | We here present our (NVIDIA) GPU-oriented development of the ELPA two-stage tridiagonalization eigensolver (ELPA2), including GPU offloading based on the cuBLAS library, and CUDA kernels to speed up the back-transformation of eigenvectors, which can be the computationally most expensive part of the two-stage tridiagonalization algorithm. | |

123 | Discrete discontinuous basis projection (DDBP) method for large-scale electronic structure calculations. | Xu, Qimen; Suryanarayana, Phanish; Pask, John | In this work, we present an approach to accelerate such calculations several-fold, without loss of accuracy, by systematically reducing the cost of the key computational step: the determination of the Kohn-Sham orbitals spanning the occupied subspace. | |

124 | MERA++: An Implementation of the Multi-scale Entanglement Renormalization Ansatz | Alvarez, Gonzalo | I will introduce MERA++, a computer program that implements MERA in two parts: a symbolic code and a numeric code. | |

125 | Matrix Product States in the Continuum and Cold Atomic Gases | Peacock, Clayton; Ljepoja, Aleksandar; Bolech, Carlos | In this talk we present an update on the continuum formulation of Matrix Product States (cMPS) to describe one dimensional dilute quantum gases. | |

126 | Overcoming the noncausality problem in nonlocal extensions of dynamical mean-field theory | Backes, Steffen; Sim, Jae-Hoon; Biermann, Silke | We present a new approach of extending the local DMFT equations to nonlocal correlations, which preserves causality and has a physically intuitive interpretation. | |

127 | Coupling interoperable software for quantum simulations of materials | Govoni, Marco; Ma, He; Sheng, Nan; Dong, Sijia; Gygi, Francois; Galli, Giulia | We present simulations that include machine learning techniques and hybrid classical-quantum computations aimed at studying both optically activated processes at finite temperature and strongly correlated states 3. | |

128 | Implementation of spin-orbit coupling in the Real-space MultiGrid (RMG) code | Lu, Wenchang; Briggs, Emil; Bernholc, Jerry; Pham, Anh; Ganesh, Panchapakesan | We implemented spin-orbit coupling in the open-source DFT electronic structure package RMG, www.rmgdft.org, which scales well from workstations to the latest CPU-GPU supercomputers. | |

129 | Magnetic and charge orders in the ground state of the 2D repulsive Hubbard model | Xu, Hao; Qin, Mingpu; Shi, Hao; He, Yuan-Yao; Vitali, Ettore; Zhang, Shiwei | We systematically study the ground state of the two-dimensional repulsive Hubbard model as a function of doping and interaction strengths, using the auxiliary field quantum Monte-Carlo (AFQMC) method combined with a self-consistent constraint to control the sign problem. | |

130 | Preparing for exascale: additive manufacturing process modeling at the fidelity of the microstructure | Belak, James; CoPA, Team; EaxAM, Team | Here, we present an overview of the motifs of computational materials science, from the “particles” used by molecular dynamics to the “grids” used by phase-field models and the various solution algorithms. | |

131 | A Path to the Exascale for Atomistic Simulations with Improved Accuracy, Length and Time Scales | Wood, Mitchell; Thompson, Aidan; Plimpton, Steven; Niklasson, Anders M. N.; Perez, Danny | New parallel time-acceleration methods such as sublattice-ParSplice and local hyperdynamics have been developed along with quantum accurate machine learned interatomic potentials to study damage accumulation in plasma facing materials. | |

132 | Accelerating Quantum Molecular Dynamics simulations with GPUs | Fattebert, Jean-Luc | In this talk I will present some software library solutions in development to facilitate porting electronic structure codes to new architectures, as well as some parallel strategies and algorithms that can help speed up time-to-solution in real applications. | |

133 | Computational cost – accuracy comparison for machine learned interatomic models across hardware | Reeve, Sam; Ganesan, Kashyap; Desai, Saaketh; Belak, James | In light of the continued conversion towards GPUs (and hybrid CPU/GPU) in scientific computing and particularly exascale computing, we demonstrate performance portable ML interatomic models, including Behler-style neural network (NNP) and spectral neighbor analysis (SNAP) potentials, employing the Kokkos programming model and the Co-design center for Particle Applications (CoPA) Cabana particle library. | |

134 | QTensor: Parallel Quantum Circuit Simulator | Alexeev, Yuri; Lykov, Danylo; Ibrahim, Cameron; Galda, Alexey | We present a parallel quantum circuit simulator* designed to run on large supercomputers with the eventual goal to run at scale on exa-scale supercomputers Aurora and Frontier. | |

135 | Memory-function approach for electronic transport in disordered solids | Troppenz, Maria; Green, Brett; Rigamonti, Santiago; Draxl, Claudia; Sofo, Jorge | We present an ab initio method for the evaluation of transport coefficients from electronic-structure calculations which goes beyond the relaxation-time approximation. | |

136 | Scalable Frameworks for Reinforcement Learning for Control of Self-Assembling Materials and for Chemistry Design | Sweeney, Christine; Welch, Paul; Schram, Malachi; Ward, Logan | The ExaLearn Exascale Computing Project has developed scalable frameworks for reinforcement learning (RL) to create policies to control scientific processes such as the self-assembly of block copolymers and chemical design. | |

137 | Gauge-covariant derivatives of the Berry curvature and orbital moment by Wannier interpolation | Liu, Xiaoxiong; Herrera, Miguel Ángel; Tsirkin, Stepan; Souza, Ivo | We demonstrate the method with ab initio calculations on real materials, as well as tight-binding toy models. | |

138 | First-Principle Calculation of Charge Carrier Mobility in 3D and 2D Hybrid Perovskites | zhang, xiaoliang; Brooks, Andrew; Zhang, Xiaoguang | We calculate the self-energy by matching the imaginary part of complex wave vector of the effective medium to that of the real configuration, where the interference effect between neighboring supercells is removed by an absorbing complex potential. | |

139 | Energy of many-particle quantum states | Ghale, Purnima; Johnson, Harley | Here, we derive a functional form for the energy of quantum many-particle systems from first principles. | |

140 | Tuning Spin-Orbit Coupling in (6,5) Single-Walled Carbon Nanotube Doped with sp3 Defects | Trerayapiwat, Kasidet Jing; Lohmann, Sven-Hendrik; Ma, Xuedan; Sharifzadeh, Sahar | Here we perform a density functional theory (DFT) study, complemented by experiment, of a variety of sp3 defects attached to (6,5) SWCNT, with the goal of tuning spin-orbit coupling (SOC) by introduction of a heavy atom in the defect structure. | Session 12: Carbon Nanotubes and Graphene Nanoribbons |

141 | Excitonic vs Mott insulator in carbon nanotubes: A proposed experimental test | Sesti, Giacomo; Varsano, Daniele; Molinari, Elisa; Rontani, Massimo | Here we propose as a unique fingerprint of the excitonic insulator the presence of a cusp in the evolution of the gap with the axial magnetic field, close to the gap mimimum. | Session 12: Carbon Nanotubes and Graphene Nanoribbons |

142 | Nonlinear Optical Spectroscopy of Graphene Nanoribbons | Sheridan, Erin; Li, Gang; Sarker, Mamun; Hao, Shan; Eom, Kitae; Sinitskii, Alexander; Eom, Chang-Beom; Irvin, Patrick; Levy, Jeremy | Here we discuss an “inkwell” method we developed to deposit GNRs on the LAO surface with an atomic force microscope tip. | Session 12: Carbon Nanotubes and Graphene Nanoribbons |

143 | Electroluminescence from Aligned (6,5) Carbon Nanotube Films: Impact Excitation of Excitons and Trions | Mojibpour, Ali; Nakamura, Motonori; Ghosh, Saunab; Adinehloo, Davoud; Komatsu, Natsumi; Gao, Weilu; Yomogida, Yohei; Yanagi, Kazuhiro; Perebeinos, Vasili; Kono, Junichiro | Here, we present electrical creation of excitons and trions in aligned films of single-chirality (6,5) SWCNTs. | Session 12: Carbon Nanotubes and Graphene Nanoribbons |

144 | Diameter-Dependent Photoluminescence Properties in Color Centers of Air-Suspended Single-Walled Carbon Nanotubes | Kozawa, Daichi; Wu, Xiaojian; Ishii, Akihiro; Fortner, Jacob; Otsuka, Keigo; Xiang, Rong; Inoue, Taiki; Maruyama, Shigeo; Wang, YuHuang; Kato, Yuichiro | The trapping potential of E 11 * and E 11 *- excitons also shows the diameter dependence, which we discuss in the presentation. | Session 12: Carbon Nanotubes and Graphene Nanoribbons |

145 | Effect of defects covalent bonding in the optical absorption and electronic structure of carbon nanotubes | Del Grande, Rafael; Menezes, Marcos; Capaz, Rodrigo | In this work, we calculate the quasiparticle band structure, absorption spectra and excitonic properties of SWCNTs bonded to hydrogen atoms by using ab initio calculations. | Session 12: Carbon Nanotubes and Graphene Nanoribbons |

146 | Charge and Thermoelectric Transport in Polymer-Sorted Semiconducting Single-Walled Carbon Nanotube Networks | Statz, Martin; Schneider, Severin; Berger, Felix; Lai, Lianglun; Wood, William; Abdi-Jalebi, Mojtaba; Leingang, Simone; Himmel, Hans-Joerg; Zaumseil, Jana; Sirringhaus, Henning | Hence, we propose trap-free, narrow DoS distr., large diameter SWCNT networks for electronic and thermoelectric applications. | Session 12: Carbon Nanotubes and Graphene Nanoribbons |

147 | Anharmonicity and Universal Response of Linear Carbon Chain Mechanical Properties under Hydrostatic Pressure | Sharma, Keshav; Costa, Nathalia; Kim, Yoong; Muramatsu, Hiroyuki; Pimenta Martins, Luiz Gustavo; Kong, Jing; Neto, Newton; Paschoal, Alexandre; Araujo, Paulo | Anharmonicity and Universal Response of Linear Carbon Chain Mechanical Properties under Hydrostatic Pressure | Session 12: Carbon Nanotubes and Graphene Nanoribbons |

148 | Molecular Dynamics Simulations of Polymeric Carbon Nanodots | Wasik, Dominika; Lombardi, Todd; Firlej, Lucyna; Kuchta, Bogdan; Roth, Michael; Wexler, Carlos | Here we present an extensive computational study (~10 10 molecular dynamics steps total) of the influence of temperature, length of polymer chain, and presence of solvents on the melting and evaporation, characterized by the dihedral distributions, probability of gauche defects and radius of gyration of the carbon dot clusters. | Session 12: Carbon Nanotubes and Graphene Nanoribbons |

149 | Synthesis, characterization, and electrical properties of nickel sulfide nanowires filled carbon nanotubes | Poudel, Yuba; Li, Wenzhi | We have developed a simple in situ method for the first time to synthesize CNTs filled with nickel sulfide nanowire (Ni 3S 2@CNTs) on various substrates using a chemical vapor deposition technique. | Session 12: Carbon Nanotubes and Graphene Nanoribbons |

150 | Temperature-dependent Conductance in Carbon Nanotube Networks | Adinehloo, Davoud; Gao, Weilu; Mojibpour, Ali; Kono, Junichiro; Perebeinos, Vasili | To explain conductance temperature dependence in (6,6) tube, we employ a full-band model within the perturbation theory to account for the phonon-assisted tunneling conductance across the CNTs. | Session 12: Carbon Nanotubes and Graphene Nanoribbons |

151 | Rational synthesis of atomically precise graphene nanoribbons directly on metal oxide surface | Kolmer, Marek; Steiner, Ann-Kristin; Izydorczyk, Irena; Ko, Wonhee; Engelund, Mads; Szymonski, Marek; Li, An-Ping; Amsharov, Konstantin | Here, we report a methodology for rational precursor design and direct synthesis of atomically precise GNRs on metal oxide surfaces: [1]. | Session 12: Carbon Nanotubes and Graphene Nanoribbons |

152 | Design Method for a Phenalenyl-Tessellation Molecule Based Nano-Graphene Network with Coexisting Localized Zero Modes and Dirac Zero Modes | MORISHITA, Naoki; Kusakabe, Koichi | In this presentaton, we report a general rule for the appearance of the LZMs and DZMs in a class of PTM-based poly-aromatic hydro carbon. | Session 12: Carbon Nanotubes and Graphene Nanoribbons |

153 | Damped Zaremba-Kohn (dZK) model: van der Waals Corrected Density Functionals for Cylindrical Surfaces | Chowdhury, Tanvir ur Rahman; Tang, Hong; Perdew, John | In this work, we put forward a derivation of vdW energy in such geometry using cylindrical green’s function and the asymptotic behavior of Bessel functions of the second kind. | Session 12: Carbon Nanotubes and Graphene Nanoribbons |

154 | A novel class of porous 2D hydrocarbons: N-carbophenes | Junkermeier, Chad; Kobobel, Jedediah; Larmand, Evan; Paupitz, Ricardo; Psofogiannakis, George | 2 Using tight-binding density functional theory, we’ve found the ground state configurations and electronic structures of carbophenes. | Session 12: Carbon Nanotubes and Graphene Nanoribbons |

155 | Control of NV Center Kinetics and Coherence | Fu, Kai-Mei | Here I discuss how single defect longitudinal studies can be utilized to directly obtain information on NV formation, disappearance and reorientation mechanisms [1]. | Session 13: Characterizing Quantum Emitters Near Surfaces |

156 | Optical properties of quantum emitters hosted by van der Waals materials | Fuchs, Gregory | In this presentation I will focus on our efforts to understand the optical properties of these emitters. | Session 13: Characterizing Quantum Emitters Near Surfaces |

157 | Control of quantum emitters in van der Waals materials via strain and photonic structures | Menon, Vinod | In this talk we will discuss our work on realizing quantum emitters in van der Waals (vdW) materials through strain engineering and coupling of these emitters to nanophotonic platforms. | Session 13: Characterizing Quantum Emitters Near Surfaces |

158 | Spin dynamics in 3D and 2D | Wrachtrup, J. | In the talk, I will discuss the spin dynamics in small scale spin clusters in 3D spin systems. | Session 13: Characterizing Quantum Emitters Near Surfaces |

159 | Optical Polarization of Quantum Emitters in Hexagonal Boron Nitride | Jungwirth, Nicholas; Calderon, Brian; Ji, Yanxin; Spencer, Michael; Flatté, Michael; Fuchs, Gregory | In this talk, I will discuss our progress on identifying and characterizing isolated defects in the Van der Waals material hexagonal boron nitride (h-BN). | Session 13: Characterizing Quantum Emitters Near Surfaces |

160 | Electron-Phonon Interactions in Flat Band Systems | Feng, Chunhan; Scalettar, Richard | Existing Quantum Monte Carlo studies have investigated the properties of fermions on a Lieb lattice interacting with an on-site, or near-neighbor electron-electron coupling. | Session 14: Charge Density Waves |

161 | A potential all-electronic route to the charge-density-wave phase in monolayer vanadium diselenide | Trott, Matthew; Hooley, Christopher | Here we present a potential mechanism for charge-density-wave formation in monolayers of vanadium diselenide in which the key role at low energies is played by a combination of electron-electron interactions and nesting. | Session 14: Charge Density Waves |

162 | Enhanced Low-Temperature Thermoelectric Performance in (PbSe)1+δ(VSe2)1 Heterostructures due to Highly Correlated Electrons in Charge Density Waves | Wang, Yu; Hamann, Danielle; Cordova, Dmitri; Chen, Jihan; Wang, Bo; Shen, Lang; Cai, Zhi; Shi, Haotian; Karapetrova, Evguenia; Aravind, Indu; Shi, Li; Johnson, David; Cronin, Steve | We explore the effect of charge density wave (CDW) on the in-plane thermoelectric transport properties of (PbSe) 1+δ(VSe 2) 1 and (PbSe) 1+δ(VSe 2) 2 heterostructures. | Session 14: Charge Density Waves |

163 | Anisotropic Resistance and Slow Time Scale Physics in Pt-Doped 1T-TiSe2 | Mazzucca, Nicholas; Avalos-Ovando, Oscar; Wang, Dongying; Morosan, Emilia; Watanabe, Kenji; Taniguchi, Takashi; Lau, Chun Ning; Trivedi, Nandini; Bockrath, Marc | Here, we present angle-dependent transport measurements on few-layer Pt-doped 1T-TiSe2 at 5% Pt doping. | Session 14: Charge Density Waves |

164 | Strange metal transport from pinned charge density waves | Gouteraux, Blaise; Delacretaz, Luca; Hartnoll, Sean; Karlsson, Anna; Amoretti, Andrea; Arean, Daniel; Musso, Daniele | In this talk, I will describe the effects of weak disorder on the hydrodynamics of incommensurate charge density waves, focusing on transport properties. | Session 14: Charge Density Waves |

165 | Study of Meta-stable States and Multiple Charge Orderings in La1/3Sr2/3FeO3 Using First-principles | Nguyen, Nam; Singh, Vijay; Park, Hyowon | Using first-principles calculations, we identify meta-stable states which can occur near the critical temperature. | Session 14: Charge Density Waves |

166 | Terahertz Time-Domain Magnetospectroscopy of La0.875Sr0.125MnO3 | Tay, Fuyang; He, Jiaming; Marquez Peraca, Nicolas; Li, Xinwei; Baydin, Andrey; Zhou, Jianshi; Kono, Junichiro | Here we study different phases of La 0.875Sr 0.125MnO 3 as a function of temperature and magnetic field via THz time-domain magnetospectroscopy. | Session 14: Charge Density Waves |

167 | Bypassing the Structural Bottleneck in the Ultrafast Melting of Electronic Order | Yang, Lexian; Bauer, Michael; Rossnagel, Kai | Bypassing the Structural Bottleneck in the Ultrafast Melting of Electronic Order | Session 14: Charge Density Waves |

168 | Langevin Simulation of Half-filled Cubic Holstein Model | Cohen-Stead, Benjamin; Chen, Chuang; Barros, Kipton; Meng, Zi Yang; Scalettar, Richard; Batrouni, George | Exploiting the further development of numerical methodology, here we present results in three dimensions, which are made possible through the use of Langevin evolution of the quantum phonon degrees of freedom. | Session 14: Charge Density Waves |

169 | Interplay of hot electron and phonon dynamics in 1T-VSe2 probed by time- and angle-resolved photoemission spectroscopy | Majchrzak, Paulina; Pakdel, Sahar; Biswas, Deepnarayan; Jones, Alfred; Volckaert, Klara; Markovic, Igor; Andreatta, Federico; Sankar, Raman; Jozwiak, Chris; Rotenberg, Eli; Bostwick, Aaron; Sanders, Charlotte; Zhang, Yu; Karras, Gabriel; Chapman, Richard; Wyatt, Adam; Springate, Emma; Miwa, Jill; Hofmann, Philip; King, Philip; Lanata, Nicola; Chang, Young Jun; Ulstrup, Søren | By monitoring the relaxation of light-induced hot electrons, we extract the time-dependent hot carrier temperature and find that the excited electrons reach a metastable thermal equilibrium with a strongly-coupled optical phonon mode on the timescale of 200 fs. | Session 14: Charge Density Waves |

170 | Experimental realization of a transient highly-metallic inverted-charge-density-wave state in 1T-TaSe2 | Zhang, Yingchao; Shi, Xun; Guan, Mengxue; You, Wenjing; Zhong, Yigui; Kafle, Tika; Huang, Yaobo; Ding, Hong; Bauer, Michael; Rossnagel, Kai; Meng, Sheng; Kapteyn, Henry; Murnane, Margaret | Experimental realization of a transient highly-metallic inverted-charge-density-wave state in 1T-TaSe2 | Session 14: Charge Density Waves |

171 | Quantum Hall charge density waves under anisotropy: from first-order to continuoustransitions | He, Yuchi; Yang, Kang; Goerbig, Mark; Mong, Roger | By adding mass anisotropy,our analytical and numerical studies show that the 2-electron bubble phase disappears and the stripephase significantly enlarges its domain in the phase diagram. | Session 14: Charge Density Waves |

172 | Charge Density Wave Melting in TiSe2 | Huber, Maximilian; Lin, Yi; Kaindl, Robert; Lanzara, Alessandra | The emergence of charge density waves (CDW) in TiSe 2 has been the subject of study for many years, with the driving mechanism for the CDW formation is still under debate. | Session 14: Charge Density Waves |

173 | 3D-ΔPDF analysis of three-dimensional CDW compound (CaxSr1-x)3Rh4Sn13 | Upreti, Puspa; Krogstad, Matthew; Poudel, Lekh; Rosenkranz, Stephan; Osborn, Raymond; Chmaissem, Omar | A three-dimensional compound series (Ca xSr 1-x) 3Rh 4Sn 13 has been identified as a promising system to understand the interplay between charge-density-waves (CDW) and superconductivity. | Session 14: Charge Density Waves |

174 | Dynamic Jahn-Teller effect on the nonequilibrium electronic transport in charge-density-wave systems | Han, Jong E | In this theoretical work, we investigate the dynamic effect of the Jahn-Teller (JT) phonons coupling of the left- and right-moving electrons and study how the initial suppression at a small electric field is related to the effectiveness of the JT effect in the large electric field limit. | Session 14: Charge Density Waves |

175 | Magic Angle Bilayer Graphene – Superconductors, Orbital Magnets, Correlated States and beyond | Efetov, Dmitri | Here we report on the fabrication of bilayer graphene devices with exceptionally uniform twist angles. | Session 15: Chern Insulators in Topological Flat bands: Twisted Bilayer Graphene and Beyond |

176 | Correlations and topology in the magic angle twisted bilayer graphene | Vafek, Oskar | In the second part of the talk, I will present a two stage renormalization group treatment [4] which connects the continuum Hamiltonian at length scales shorter than the moire superlattice period to the Hamiltonian for the active narrow bands only, which is valid at distances much longer than the moire period. | Session 15: Chern Insulators in Topological Flat bands: Twisted Bilayer Graphene and Beyond |

177 | Correlation and Topology in Magic Angle Twisted Bilayer Graphene | Yazdani, Ali | I will describe these experiments, and other ongoing efforts, that illustrate the power of atomic scale experiments in revealing novel physics of electrons in moiré superlattices. | Session 15: Chern Insulators in Topological Flat bands: Twisted Bilayer Graphene and Beyond |

178 | Isospin analog of the Pomeranchuk effect in twisted bilayer graphene | Saito, Yu | In this talk, I will describe experiments probing the finite-temperature phase diagram of isospin symmetry breaking in high quality twisted bilayer graphene using transport and thermodynamic measurements. | Session 15: Chern Insulators in Topological Flat bands: Twisted Bilayer Graphene and Beyond |

179 | Chern Insulators and Topological Flat-bands in Magic-angle Twisted Bilayer Graphene | Wu, Shuang | Here we report on magneto-transport and Hall density measurements that reveal a succession of doping-induced Lifshitz transitions where discontinuous changes in the Fermi surface topology are accompanied by van Hove singularities (VHS) that facilitate the emergence of correlation-induced gaps and topologically non-trivial sub-bands. | Session 15: Chern Insulators in Topological Flat bands: Twisted Bilayer Graphene and Beyond |

180 | High magnetic field ultrasound study of spin freezing in La1.88Sr0.12CuO4 | frachet, mehdi; benhabib, siham; Vinograd, Igor; Wu, Shangfei; vignolle, baptiste; Mayaffre, Hadrien; Kraemer, Steffen; Kurosawa, Tohru; Momono, Naoki; Oda, Migaku; Chang, Johan; Proust, Cyril; Julien, Marc-Henri; LeBoeuf, David | Here we focus on the case of La 1.88Sr 0.12CuO 4 [2] where this magnetic phase is the most prominent [3]. | Session 16: Competing Phases and Superconductivity |

181 | Charge and pair density waves in the one band Hubbard model with cluster dynamical mean-field theory | Dash, Sidhartha; Senechal, David | We use cluster dynamical mean-field theory on the one-band Hubbard model at zero temperature with an exact diagonalization solver to study the normal and the superconducting phases. | Session 16: Competing Phases and Superconductivity |

182 | Magnetic and charge orders in the ground state of the Emery model: accurate numerical results | Vitali, Ettore; Chiciak, Adam; Zhang, Shiwei | We present detailed information on the charge order, spin order, momentum distribution, and localization properties as a function of charge-transfer energy for the the under-doped regime. | Session 16: Competing Phases and Superconductivity |

183 | Response of charge stripes to uniaxial stress in La1.475Nd0.4Sr0.125CuO4 | Boyle, Timothy; Walker, Morgan; Ruiz, Alejandro; Schierle, Enrico; Zhao, Zitong; Boschini, Fabio; Sutarto, Ronny; Boyko, Teak; Moore, William; Tamura, Nobumichi; He, Feizhou; Weschke, Eugen; Gozar, Adrian; Zhao, Li; Guo, Hanjie; Komarek, Alexander; Schüßler-Langeheine, Christian; Frano, Alex; Da Silva Neto, Eduardo; Blanco-Canosa, Santiago | Altogether, we observe a dramatic response of the electronic properties of LNSCO-125 to the explicit broken symmetry induced by uniaxial stress. | Session 16: Competing Phases and Superconductivity |

184 | Pinning Pair-Density-Wave Superconductivity about Zn Impurities in a Cuprate | Tranquada, John; Mercado, Pedro; Li, Qiang; Gu, Genda | In studying stripe-ordered La 1.905Ba 0.095CuO 4 with superconducting T c = 32 K, we have previously shown that both a c-axis magnetic field and 1% Zn doping enhance the spin-stripe order [1]. | Session 16: Competing Phases and Superconductivity |

185 | Superconducting instability near a quantum critical point – fate of the fermions | Pimenov, Dimitri; Kamenev, Alex; Chubukov, Andrey | We study the impact of this instability on the fermionic quasiparticles, by tracking the evolution of the fermionic self-energy at T = 0 from the normal to the superconducting state. | Session 16: Competing Phases and Superconductivity |

186 | Effect of Electron Irradiation on the Interplay of Charge Density Wave and Superconductivity in 3-4-13 Stannides | Krenkel, Elizabeth; Tanatar, Makariy; Timmons, Erik; Prozorov, Ruslan; Wang, Kefeng; Petrovic, Cedomir; Grasset, Romain | Effect of Electron Irradiation on the Interplay of Charge Density Wave and Superconductivity in 3-4-13 Stannides | Session 16: Competing Phases and Superconductivity |

187 | Non BCS-like superfluid density in a disordered charge density wave material: Pd-intercalated ErTe3 | Iguchi, Yusuke; Straquadine, Joshua; Kirtley, John; Singh, Anisha; Fisher, Ian; Moler, Kathryn | We observed an anomalous increase of superfluid density near the critical temperature, which cannot be explained by the Bardeen-Cooper-Schrieffer (BCS) theory. | Session 16: Competing Phases and Superconductivity |

188 | Evolving Charge Order in a Tunable Electronic Nematic Superconducting System | Collini, John; Eckberg, Chris; Lee, Sangjun; Sun, Stella; Abbamonte, Peter; Paglione, Johnpierre | We report single crystal X-ray diffraction observations that show a unidirectional charge order with wavevector (0.27,0,0)_{tet} in BaNi2As2 decays and vanishes by x=0.65. | Session 16: Competing Phases and Superconductivity |

189 | Light-enhanced Charge Density Wave Coherence in YBa2Cu3O6+x | Wandel, Scott; Boschini, Fabio; Da Silva Neto, Eduardo; Turner, Joshua; Shen, Lingjia; Na, MengXing; Zohar, Sioan; Koralek, Jake; Liang, Ruixing; Bonn, Doug; Hardy, Walter; Damascelli, Andrea; Coslovich, Giacomo | We report ultrafast resonant soft x-ray scattering results tracking the transient evolution of charge density wave correlations in the high temperature superconductor YBa 2Cu 3O 6+x. Ultrashort infrared pulses produce a non-thermal quench of the superconducting state, while X-ray pulses detect the reaction of charge density waves. | Session 16: Competing Phases and Superconductivity |

190 | Superconductivity and charge density wave order in the doped Holstein model | Bradley, Owen; Scalettar, Richard | We use Determinant Quantum Monte Carlo (DQMC) simulations to explore the onset of SC order in doped systems through measurements of the s-wave pair susceptibility. | Session 16: Competing Phases and Superconductivity |

191 | Inhomogeneous distribution of stripe domains in La1.875 Ba0.125CuO4 | Wu, Longlong; Assefa, Tadesse; Mazzone, Daniel; Huang, Xiaojing; Gu, Genda; Mazzoli, Claudio; Dean, Mark; Robinson, Ian | We suggest that this behavior arises because of active nucleation and pinning of the stripe domains at twin domain walls introduced in the crystal lattice when it passes into its lower symmetry low-temperature orthorhombic phase. | Session 16: Competing Phases and Superconductivity |

192 | Electronic Structure of the Half-Vortex of a Pair-Density-Wave Superconductor | Rosales, Marcus; Fradkin, Eduardo | Motivated by a recent STM experiment by Z. Du et al [Nature 580, 65 (2020)], we present results on the quasiparticle states of the PDW half-vortex both in the pure PDW state and in the state in which PDW order and uniform d-wave superconducting order coexist. | Session 16: Competing Phases and Superconductivity |

193 | Vanishing electronic nematic order beyond the quantum critical point in overdoped cuprate superconductors | Gupta, Naman; McMahon, Christopher; Sutarto, Ronny; Shi, Tianyu; Gong, Rantong; Wei, Haofei; Shen, Kyle; He, Feizhou; Ma, Qianli; Gaulin, Bruce; Hawthorn, David | In this study, we employ resonant x-ray scattering in the cuprate high-temperature superconductor Nd-LSCO to probe the relationship between electronic nematicity of the Cu 3 d orbitals and hole doping. | Session 16: Competing Phases and Superconductivity |

194 | Dynamical charge density fluctuations in superconducting cuprate YBa2Cu3O6+x | Zhu, Mengze; Garcia-Fernnandez, Mirian; Nag, Abhishek; Zhou, Ke-jin; Hayden, Stephen | In the normal state, we find that the charge response near Q CDW can be described in the framework of fluctuations due the proximity of a quantum critical point. | Session 16: Competing Phases and Superconductivity |

195 | Dynamics, Entanglement, and the Classical Point in the Transverse-Field XXZ Chain Cs2CoCl4 | Laurell, Pontus; Scheie, Allen; Mukherjee, Chiron; Koza, Michael; Enderle, Mechthild; Tylczynski, Zbigniew; Okamoto, Satoshi; Coldea, Radu; Tennant, David; Alvarez, Gonzalo | We investigate the quantum phase transition in the S=1/2 transverse-field XXZ spin chain using multiple entanglement measures and witnesses. | Session 17: Correlated Chains and 1D Systems |

196 | Spin dynamics in the transverse-field Ising chain at nonzero temperature | Yang, Jiahao; Kormos, Marton; Wu, Jianda; Si, Qimiao | Here, we study the spin dynamical structure factor in the quantum disordered region of TFIC. | Session 17: Correlated Chains and 1D Systems |

197 | Spin dynamics of a perturbed quantum critical Ising chain | Wang, Xiao; Zou, Haiyuan; Hódsági, Kristóf; Kormos, Marton; Wu, Jianda | Using analytical form factors of the quantum E 8 integrable model, we systematically study the spin dynamic structure factor of the perturbed quantum critical Ising chain, where particle channels with total energy up to 5 m 1 ( m 1 being the mass of the lightest E 8 particle) are exhausted. | Session 17: Correlated Chains and 1D Systems |

198 | Onsager’s scars in disordered spin chains | Shibata, Naoyuki; Yoshioka, Nobuyuki; Katsura, Hosho | We propose a new class of spin models with QMBS [3] by making full use of the so-called Onsager algebra. | Session 17: Correlated Chains and 1D Systems |

199 | Emptiness Formation Probability in 1D Quantum Liquids. | Yeh, Hsiu-Chung; Kamenev, Alex | We employ the instanton technique [A. Abanov, 2004] to study quantitative details of these regime and compare it with previously reported limited cases. | Session 17: Correlated Chains and 1D Systems |

200 | Adiabatic formation of bound states in the 1d Bose gas | Bastianello, Alvise; Koch, Rebekka; Caux, Jean-Sebastian | In this talk, I discuss the bound state formation in the 1d Bose gas out of equilibrium due to interaction changes from the repulsive to the attractive regime. | Session 17: Correlated Chains and 1D Systems |

201 | Violation of Wiedemann-Franz law in strongly interacting one-dimensional electrons | Sharma, Kamal | We present our study on the violation of Wiedemann-Franz law in one-dimensional strongly interacting spinless electron systems. | Session 17: Correlated Chains and 1D Systems |

202 | Hydrodynamic descriptions of multi-component quantum fluids in one-dimensional systems | Wang, Yanqi; Moore, Joel | In this work, within the frame of hydrodynamics, we investigate a generic Luttinger liquid theory (i.e., incorporating integrability-breaking perturbations) which is closely related to the two-dimensional Dirac fluid in graphene, with various transport properties calculated. | Session 17: Correlated Chains and 1D Systems |

203 | Viscous Properties of One-Dimensional Fermi Gases | DeGottardi, Wade; Matveev, K. A. | We present recent work on the hydrodynamics of one-dimensional and quasi-one-dimensional Fermi gases. | Session 17: Correlated Chains and 1D Systems |

204 | Long-Range Falikov Kimball Model in One Dimension: Phase Transition, Disorder-Free Localisation and Delocalisation | Hodson, Thomas; Wilsher, Josef; Knolle, Johannes | Here, we propose a generalised \ac{FK} model in one dimension with long-range interactions which shows a similarly rich phenomenology. | Session 17: Correlated Chains and 1D Systems |

205 | True Bilayer Exciton Condensate of One-Dimensional Electrons | Kantian, Adrian | We theoretically predict that a true bilayer exciton condensate, characterized by off-diagonal long-range order and global phase coherence, can be created in one-dimensional solid state electron systems. | Session 17: Correlated Chains and 1D Systems |

206 | Far-from-equilibrium dynamics in open fermion chains | Moreira de Oliveira, Miguel; Ribeiro, Pedro; Kirchner, Stefan | Recent attention has been paid to the study of open systems coupled to Markovian reservoirs using MPS techniques. | Session 17: Correlated Chains and 1D Systems |

207 | Continuous Néel-VBS Quantum Phase Transition in Non-Local one-dimensional systems with SO(3) Symmetry | Jian, Chao-Ming; Xu, Yichen; Wu, Xiaochuan; Xu, Cenke | This work found that the original (1+1)d boundary conformal field theory of a 2d SPT state is unstable due to coupling to the boundary avatar of the bulk quantum critical fluctuations. | Session 17: Correlated Chains and 1D Systems |

208 | Attenuation of energy relaxation in chiral one-dimensional quantum channels | Fischer, Stefan; Rosenow, Bernd; Gefen, Yuval; Meir, Yigal | To investigate the resulting energy distribution also in the presence of a non-linear plasmon dispersion relation, we present a solution of the problem that is exact in the semiclassical limit, applicable when the injection energy is much higher than the typical plasmon energy, and when the energy loss is not too large. | Session 17: Correlated Chains and 1D Systems |

209 | Disorder-induced Enhancement of Entanglement Growth in One Dimension: Information Leakage at the scale of localization length | GHOSH, ROOPAYAN; Das, Arnab | We show, though breaking of translational invariance (TI) of the lattice by disorder slows down the spreading of local observables, the entanglement entropy of a subsystem can nonetheless receive a remarkable enhancement as long as the subsystem lies within the single-particle localization length. | Session 17: Correlated Chains and 1D Systems |

210 | Interplay between Electron Pairing and Nonlinear Hall Effect in LaAlO3/SrTiO3 nanostructures | Nethwewala, Aditi; Lee, Hyungwoo; Li, Jianan; Briggeman, Megan; Pai, Yun-Yi; Lee, Jungwoo; Eom, Chang-Beom; Irvin, Patrick; Levy, Jeremy | Here, we report simultaneous longitudinal and Hall measurements in quasi-1D cross-shaped electron waveguides (“nanocrosses”) created at the LaAlO 3/SrTiO 3 interface using conductive atomic force microscope lithography. | Session 18: Correlated Electrons in 2D |

211 | Non-Fermi Liquids in Conducting 2D Networks | Lee, Jongjun; Oshikawa, Masaki; Cho, Gil Young | We explore the physics of novel fermion liquids emerging from conducting networks, where 1D metallic wires form a periodic 2D superstructure. | Session 18: Correlated Electrons in 2D |

212 | Manipulation of electron-phonon energy transfer pathways in 2D transition metal dichalcogenides through ultrafast excitation | Gentry, Christian; Cating-Subramian, Emma; Ryan, Sinead; You, Wenjing; Shi, Xun; Kapteyn, Henry; Murnane, Margaret | Here we use visible pump-probe spectroscopy to further explore and manipulate the couplings between the electron and phonon systems. | Session 18: Correlated Electrons in 2D |

213 | Energy relaxation in a low-density nonequilibrium 2D hole gas at the quantum hall plateau-plateau transition | Kruglov, Dmitrii; Klysheva, Elina; Kogan, Andrei; Liu, Chieh-Wen; Gao, Xuan; Pfeiffer, Loren; West, Ken | We present P-T curves constructed by matching P and T values at a given S, and compare these to a set of similar curves obtained for the sample resistance R at B=0. | Session 18: Correlated Electrons in 2D |

214 | Electrically controlled two-dimensional electron-hole fluids | Zeng, Yongxin; MacDonald, Allan | In this talk I will discuss the electronic properties of a dual-gated electron-hole bilayer in which the two layers are separated by a perfectly opaque tunnel barrier. | Session 18: Correlated Electrons in 2D |

215 | Renormalized analytic solution for the enstrophy cascade in two-dimensional quantum turbulence-3 | Forrester, Andrew; Chu, Han-Ching; Williams, Gary | Renormalized analytic solution for the enstrophy cascade in two-dimensional quantum turbulence-3 | Session 18: Correlated Electrons in 2D |

216 | Hilbert space fragmentation and hydrodynamics in two-dimensional systems | Lehmann, Julius; Rakovszky, Tibor; Sala de Torres-Solanot, Pablo; Pollmann, Frank | To validate these concepts, we numerically investigate the stochastic evolution of blocked cellular automata with higher-moment conservation. | Session 18: Correlated Electrons in 2D |

217 | Anomalous density fluctuations in a random t-J model | Joshi, Darshan; Sachdev, Subir | A previous work [1] found a deconfined critical point at nonzero doping in a t -J model with all-to-all and random hopping and spin exchange and argued for its relevance to the phenomenology of the cuprates. | Session 18: Correlated Electrons in 2D |

218 | Nematic fluctuations in the Hubbard model | Liu, Tianyi; Huang, Edwin; Moritz, Brian; Devereaux, Thomas | Here we report calculations of the nematic susceptibilities from determinant quantum Monte Carlo (DQMC) simulations of the Hubbard model, for various model parameters, doping levels, and temperatures. | Session 18: Correlated Electrons in 2D |

219 | Luttinger Breaking Fermi-surface in the Repulsive Fermi-Hubbard Model | Osborne, Ian; Trivedi, Nandini; Paiva, Thereza | We obtain the Fermi surface contour from the spectral weight A k(ω=0) and from an analysis of the singularities of the Green’s function Re[G k(E=0)], calculated using determinantal quantum Monte Carlo and analytic continuation methods. | Session 18: Correlated Electrons in 2D |

220 | Dynamics of a two-dimensional quantum spin-orbital liquid: spectroscopic signatures of fermionic magnons | Natori, Willian; Knolle, Johannes | In this talk, we discuss the dynamical correlations of quantum spin-orbital liquid phases of an SU(2)-symmetric Kitaev honeycomb lattice model [1]. | Session 18: Correlated Electrons in 2D |

221 | Temperature-Dependent Magnetization, Raman Scattering, and X-Ray Diffraction Study of Phase Transitions in Layered Multiferroic CuCrP2S6 | Susner, Michael; Rao, Rahul; Lv, Bing; Conner, Benjamin; liu, wenhao; Pelton, Anthony; Michael, McLeod; Maruyama, Benji | Metal thiophosphates are an interesting class of these materials that contain a common structural framework where altering the cation can induce different types of ferroic ordering, including ferroelectricity and magnetism. | Session 18: Correlated Electrons in 2D |

222 | Machine Learning Enable the Large Scale Kinetic Monte Carlo for Falicov-Kimball Model | Zhang, Sheng; Zhang, Puhan; Chern, Gia-wei | Here we apply the modern machine learning (ML) technique to enable the first-ever large-scale kinetic Monte Carlo (kMC) simulations of FK model. | Session 18: Correlated Electrons in 2D |

223 | Phonon Hall Viscosity and Berry Phase in Magnetic Insulators | Ye, Mengxing; Balents, Leon | We present a systematic procedure to obtain the phonon Hall viscosity induced by phonon-magnon interaction in magnetic insulators under an external magnetic field. | Session 19: Correlated Electrons in Cuprates and Titanates |

224 | Cavity Probes and Control of Antiferromagnetic Fluctuations in a Mott Insulator | Curtis, Jonathan; Grankin, Andrey; Poniatowski, Nicholas; Narang, Prineha; Galitski, Victor; Demler, Eugene | We present a mechanism for coupling the electromagnetic field of a THz cavity to the antiferromagnetic order in a simplified model of an undoped cuprate Mott insulator. | Session 19: Correlated Electrons in Cuprates and Titanates |

225 | Ultrafast magnetic dynamics in insulating YBa2Cu3O6.1 revealed by time resolved two-magnon Raman scattering | Reznik, Dmitry; Yang, Jhih-An; Pellatz, Nick; Wang, Thomas; Nandkishore, Rahul | Here, we introduce time-resolved two-magnon Raman scattering as a real time probe of magnetic correlations especially well-suited for antiferromagnets. | Session 19: Correlated Electrons in Cuprates and Titanates |

226 | Unveiling the Normal State of Cuprates with Charge and Spin Orders | Popovic, Dragana | Time permitting, this talk will describe the main results of the comprehensive series of experiments [1-4] performed using several complementary electrical transport techniques on underdoped La-214 cuprates in which charge and spin orders appear in the form of stripes near x~1/8 doping. | Session 19: Correlated Electrons in Cuprates and Titanates |

227 | Super Van Hove singularities in cuprate high-Tc superconductors | Markiewicz, Robert; Singh, Bahadur; Lane, Christopher; Bansil, Arun | [1] Here we discuss the existence of high-order VHSs in the cuprate high- Tc superconductors and show how these VHSs are the result of the effective electronic dimensionality of the material being smaller than the dimensionality of the crystal lattice. | Session 19: Correlated Electrons in Cuprates and Titanates |

228 | An ab initio Study of Oxygen Vacancies in Ba2CuO4-δ | Matzelle, Matthew; Lane, Christopher; He, Ruihua; Markiewicz, Robert; Bansil, Arun | Using state-of-the-art ab initio techniques, we systematically examine the energy landscape and electronic structure of oxygen vacancies in Ba 2CuO 4-δ. | Session 19: Correlated Electrons in Cuprates and Titanates |

229 | A large modulation of electron-phonon coupling and an emergent superconducting dome in doped strong ferroelectrics | Ma, Jiaji; Yang, Ruihan; Chen, Hanghui | We use first-principles methods to study doped strong ferroelectrics (taking BaTiO 3 as a prototype). | Session 19: Correlated Electrons in Cuprates and Titanates |

230 | The Pockels Response in Low-Temperature Rhombohedral BaTiO3 | Paoletta, Therese; Demkov, Alexander | In this talk, we report a first principles analysis built on density functional perturbation theory, exploring the origins of a strong Pockels response by examining the components that make up the ionic contribution to the electro-optic tensor. | Session 19: Correlated Electrons in Cuprates and Titanates |

231 | First-principles and Group-theoretical Analysis of the Magnetic Order in the Rare Earth Titanates | Gautreau, Dominique; Wang, Zhentao; Fernandes, Rafael; Birol, Turan | We present a combined first-principles, group theoretical, and phenomenological analysis to elucidate the nature of the magnetic phases in strained (biaxial and uniaxial) and doped compounds. | Session 19: Correlated Electrons in Cuprates and Titanates |

232 | Influence of structural distortions on the magnetic order of rare-earth titanates | Najev, Ana; Pelc, Damjan; Hameed, Sajna; Gautreau, Dominique; Joe, Joseph; Wang, Zhentao; Pozek, Miroslav; Birol, Turan; Fernandes, Rafael; Greven, Martin | We compare the results to ab initio calculations and discuss implications for the nature of the ground state and magnetic transitions in these systems. | Session 19: Correlated Electrons in Cuprates and Titanates |

233 | The effect of electronically-induced lattice distortions on the structural distortions in layered lanthanum cuprates. | Keegan, Christopher; Senn, Mark; Bristowe, Nicholas; Mostofi, Arash | In this work we use density-functional theory calculations to understand the extent to which structural distortions arising from the Jahn-Teller effect induce a symmetry-breaking distortion in the Ba-doped system but not in the Sr-doped system. | Session 19: Correlated Electrons in Cuprates and Titanates |

234 | Emergent Behavior in Ni1+-Rich Layered Nickelates | Mitchell, John | We present an expanded phase diagram of the reduced, layered nickelates and suggest ways in which these materials might be made superconductors. | Session 20: Correlated Electrons in Nickelates and Manganites |

235 | Intertwined Density Waves in a Metallic Nickelate | Zhang, Junjie; Phelan, Daniel; Zheng, Hong; Rosenkranz, Stephan; Osborn, Raymond; Botana, Antia; Qiu, Yiming; Krogstad, Matthew; Chen, Yu-sheng; Rodriguez-Rivera, Jose; Wang, Suyin; Norman, Michael; Mitchell, John | Here, we demonstrate that this transition results from an incommensurate density wave with both charge and magnetic character that lies closer in its behavior to the metallic density wave seen in chromium metal than the insulating stripes typically found in single-layer nickelates like La 2-xSr xNiO 4. | Session 20: Correlated Electrons in Nickelates and Manganites |

236 | Low spin configuration and giant orbital polarization of Ni2+ in square planar environment | Mandal, Prithwijit; PATEL, RANJAN; Rout, Dibyata; Banerjee, Rajdeep; Bag, Rabindranath; karmakar, koushik; Narayan, Awadhesh; Freeland, John; Singh, Surjeet; Middey, Srimanta | To understand this, we have investigated the electronic and magnetic structure of Sr 2CuO 3 and Sr 2Cu 0.9Ni 0.1O 3. | Session 20: Correlated Electrons in Nickelates and Manganites |

237 | Epitaxial strain on nickelate RNiO3 thin films (R = Nd1-xSrx, La1-xNdx) | Ponti, Gregorio; Tebo, Jonathan D.; Barajas, Alexander; Markert, John | We report x-ray diffraction and resistivity measurements on strained nickelate thin films. | Session 20: Correlated Electrons in Nickelates and Manganites |

238 | Electronic-structural interplay in correlated materials with site- and orbital- selective Mott states: an embedded dynamical mean field theory perspective | Pascut, Gheorghe; Coulter, Jennifer; Chandra, Premala; Rabe, Karin; Haule, Kristjan | In this talk we will discuss about the predictive powers of the DFT+eDMFT for the electronic-structural interplay for novel electronic states of matter in the materials mentioned above, where (I) Mott and metallic orbitals coexist (orbital-selective Mott state), (II) Mott, metallic and semi-metallic orbitals coexist (site-orbital-selective Mott state) and (III) Mott and band orbitals coexist (site-orbital-selective Mott state). | Session 20: Correlated Electrons in Nickelates and Manganites |

239 | Unusual effects of magnetic dilution in the ferrimagnetic columnar ordered Sm2MnMnMn4–xTixO12 perovskites | Vibhakar, Anuradha; Khalyavin, Dmitry; Manuel, Pascal; Liu, Ran; Yamaura, Kazunari; Belik, Alexei; Johnson, Roger | We show that in all three compositions the Mn ions adopt a collinear ferrimagnetic structure below 27 K, 62 K and 34 K, respectively. | Session 20: Correlated Electrons in Nickelates and Manganites |

240 | Understanding the metal-to-insulator transition in La1-xSrxCoO3−δ and its applications for neuromorphic computing | Zhang, Shenli; Galli, Giulia | We show that, contrary to accepted views, cooperative structural distortions instead of local bonding changes are responsible for the MIT, and we describe the subtle interdependence of structural and magnetic transitions. | Session 20: Correlated Electrons in Nickelates and Manganites |

241 | Magnetism and Transport in Novel High-Pressure Phases of Iron-Oxides | Khanal, Ghanashyam; Vasiukov, Denis; Haule, Kristjan | We study a number of compounds from the homologous series (nFeO mFe$_2$O$_3$) using Density Functional Theory (DFT) + embedded Dynamical Mean-Field Theory (eDMFT) functional method to understand the electronic structure, magnetic and transport properties. | Session 20: Correlated Electrons in Nickelates and Manganites |

242 | Properties of La0.7Ca0.3MnO3 under extreme tensile strength studied using Monte Carlo simulations | Sen, Cengiz; Dagotto, Elbio | Here we reproduce the results of the experiments using Monte Carlo simulations of the two-orbital double-exchange model including Jahn-Teller distortions, at hole density x=1/3. | Session 20: Correlated Electrons in Nickelates and Manganites |

243 | CaMn2O4-d a possible multiferroic candidate, an annealing study | Gooch, Melissa; Wu, Hung-Cheng; Deng, Liangzi; Yang, Hung-Duen; Chu, Ching | CaMn2O4-d a possible multiferroic candidate, an annealing study | Session 20: Correlated Electrons in Nickelates and Manganites |

244 | Magnetic structure of perovskite-derived LaNiO3-δ nickelate with ordered oxygen vacancies | Shin, Yongjin; Rondinelli, James | We find square planar NiO 4 units formed by ordered oxygen vacancies are electronically and magnetically inactive, which along with changes in the NiO 6 connectivity, govern the phase transitions. | Session 20: Correlated Electrons in Nickelates and Manganites |

245 | Ultrafast spin-nematic and ferroelectric phase transitions in a photo-induced charge and orbital ordered manganite | Rajpurohit, Sangeeta; Tan, Liang; Blöechl, P. E. | We propose a mechanism for the optical excitation of a non-collinear antiferromagnet leading selectively to new spin orders beyond a critical light-intensity. | Session 20: Correlated Electrons in Nickelates and Manganites |

246 | The Role of Phonons and Defects in the Recently Discovered Non-Cubicity of SrVO3 | Berry, Tanya; Fry-Petit, Allyson; Sinha, Mekhola; Zhang, Qiang; Auffermann, Gudrun; McQueen, Tyrel; Rudin, Sven; Phelan, William | Motivated by reports of imaginary phonon modes in DFT calculations of cubic SrVO 3 and employing high quality neutron scattering data, we indeed find that the neutron diffraction and corresponding pair distribution function of SrVO 3 over a range of temperatures are better modeled to lower symmetry structures. | Session 20: Correlated Electrons in Nickelates and Manganites |

247 | Competing phases and their selection in two-dimensional doped Dirac and Luttinger liquid | Szabo, Andras; Roy, Bitan | We consider the problem of interacting spinful electrons in mono- and bilayer graphene both at zero and at finite temperature and chemical doping. | Session 21: Correlated Topological States in Lower Dimension |

248 | Fractonic topological phases from coupled wires | Sullivan, Joseph; Dua, Arpit; Cheng, Meng | We explore fractonic topological phases using three-dimensional coupled wire constructions, which have proven to be a successful tool to realize and characterize topological phases in two dimensions. | Session 21: Correlated Topological States in Lower Dimension |

249 | DMRG evidence for superconductivity via skyrmion-condensation: Application to magic angle graphene | Chatterjee, Shubhayu; Ippoliti, Matteo; Zaletel, Michael | We numerically study the fate of interacting electrons in tunnel-coupled spinful Chern bands with opposite Chern numbers using density-matrix renormalization group (DMRG). | Session 21: Correlated Topological States in Lower Dimension |

250 | Topological edge and interface states at bulk disorder-to-order quantum critical points | Xu, Yichen; Wu, Xiaochuan; Jian, Chao-Ming; Xu, Cenke | We study the interplay between two nontrivial boundary effects: (1) the two-dimensional (2d) edge states of three-dimensional (3d) strongly interacting bosonic symmetry-protected topological states, and (2) the boundary fluctuations of 3d bulk disorder-to-order phase transitions. | Session 21: Correlated Topological States in Lower Dimension |

251 | Lieb-Schultz-Mattis type theorems for Majorana chains with discrete symmetries | Aksoy, Ömer Mert; Tiwari, Apoorv; Mudry, Christopher | We derive a set of Lieb-Schultz-Mattis type constraints in (1+1)-dimensional spacetime relevant to the local Hamiltonians represented by Majorana fermions that are invariant under discrete symmetries. | Session 21: Correlated Topological States in Lower Dimension |

252 | Level statistics of the strained Kitaev honeycomb model with Heisenberg interactions and disorder | Fremling, Mikael; Fritz, Lars | We study the Kitaev honeycomb spin model in the presence of geometric strain and weak residual Heisenberg interactions. | Session 21: Correlated Topological States in Lower Dimension |

253 | Subdiffusive dynamics and critical quantum correlations in a disorder-free localized Kitaev honeycomb model | Zhu, Guo-Yi; Heyl, Markus | In this work we show that this mechanism can lead to unconventional states of quantum matter as the absence of thermalization lifts constraints imposed by equilibrium statistical physics. | Session 21: Correlated Topological States in Lower Dimension |

254 | Non-abelian anyons induced by spontaneous symmetry breaking in a generalized Kitaev spin liquid model | Li, Bo-Hai; Wang, Hao-Xin; Yao, Hong | We propose an extended-Kitaev model on spin-1/2 honeycomb models with time-reversal-preserving interaction. | Session 21: Correlated Topological States in Lower Dimension |

255 | Emergent symmetries in the global phase diagram of two-dimensional extended honeycomb-Hubbard model | Roy, Bitan | I will show that the global phase diagram of two-dimensional extended honeycomb-Hubbard model of interacting massless Dirac fermions is governed by altogether five quantum critical points. | Session 21: Correlated Topological States in Lower Dimension |

256 | Local Probes for Charge-Neutral Edge States in Two-Dimensional Quantum Magnets | Knolle, Johannes; Feldmeier, Johannes; Natori, Willian; Knap, Michael | Here we propose spin-polarized scanning tunneling microscopy as a spin-sensitive local probe to provide direct information about charge neutral topological edge states. | Session 21: Correlated Topological States in Lower Dimension |

257 | Negative electronic compressibility in multi-band 2D electron gases with application to LaAlO3/SrTiO3 | Mahabir, Aditi; Balatsky, Alexander; Haraldsen, Jason | We investigate the effects of a two-band model in the description of the negative electronic compressibility (NEC) for the two-dimensional electron gas (2DEG). | Session 21: Correlated Topological States in Lower Dimension |

258 | Realization of an antiferromagnetic superatomic graphene: Dirac Mott insulator and circular dichroism Hall effect | Zhou, Yinong; Liu, Feng | Based on first-principles calculations, we investigate the electronic and topological properties of an antiferromagnetic (AFM) superatomic graphene lattice superimposed on a bipartite honeycomb lattice governed by Lieb’s theorem of itinerant magnetism. | Session 21: Correlated Topological States in Lower Dimension |

259 | Fractons, on a plate! | Manoj, Nandagopal; Shenoy, Vijay | We demonstrate a duality between a vector charge fractonic gauge theory and the theory of an elastic plate. | Session 21: Correlated Topological States in Lower Dimension |

260 | A fermionic Quantum Monte Carlo study of Twisted Bilayer Graphene | Lee, Jong Yeon; Hofmann, Johannes; Khalaf, Eslam; Vishwanath, Ashvin; Berg, Erez | We present a quantum Monte Carlo (QMC) study of twisted bilayer graphene (TBG) near the magic angle at half-filling. | Session 21: Correlated Topological States in Lower Dimension |

261 | Correlation-driven super Van Hove singularity in slow graphene | Wang, Baokai; Singh, Bahadur; Lin, Hsin; Markiewicz, Robert; Bansil, Arun | We show how such VHSs emerge in the paradigmatic family of slow graphenes to produce the excitonic insulator (EI) state. | Session 21: Correlated Topological States in Lower Dimension |

262 | Strongly Correlated Holes in a MoSe2/WSe2 Moiré Superlattice | Campbell, Aidan; Brotons-Gisbert, Mauro; Baek, Hyeonjun; Watanabe, Kenji; Taniguchi, Takashi; Gerardot, Brian | We perform resonant absorption spectroscopy of intralayer excitons in a dual-gate tuneable angle-aligned MoSe 2/WSe 2 heterostructure at 4K. | Session 22: Correlations in Graphene |

263 | Bounds on low energy spectral weight and superfluid stiffness in strongly correlated systems | Verma, Nishchhal; Hazra, Tamaghna; Randeria, Mohit | We have previously obtained rigorous upper bounds [1] on the superfluid stiffness of multi-band systems with arbitrary interactions in any dimension. | Session 22: Correlations in Graphene |

264 | Local spectroscopic study of moiré band flattening and correlated gaps in magic-angle twisted bilayer graphene | Kim, Hyunjin; Choi, Youngjoon; Lewandowski, Cyprian; Peng, Yang; Thomson, Alex; Watanabe, Kenji; Taniguchi, Takashi; Alicea, Jason; Nadj-Perge, Stevan | Here, we report scanning tunneling spectroscopy measurements of TBG across the area where the twist angle slowly changes from non-magic to magic-angle value. | Session 22: Correlations in Graphene |

265 | Twisted Trilayer Graphene: a Precisely Tunable Platform for Correlated Electrons | Zhu, Ziyan; Carr, Stephen; Massatt, Daniel; Luskin, Mitchell; Kaxiras, Efthimios | To explore the evolution of VHS in the twist-angle phase space of tTLG, we present a general low-energy electronic structure model for any pair of twist angles. | Session 22: Correlations in Graphene |

266 | Theoretical study of correlated electronic states in twisted monolayer-bilayer graphene | Alezzi, Mohammed; Gu, Xingyu; Carvalho, Alexandra; Raghuvanshi, Nimisha; Shi, Yanmeng; Falko, Vladimir; Novoselov, Kostya; Castro Neto, Antonio Helio; Adam, Shaffique | Theoretical study of correlated electronic states in twisted monolayer-bilayer graphene | Session 22: Correlations in Graphene |

267 | Ultrafast Correlated Electron Dynamics in Finite Graphene Nanostructures | Joost, Jan-Philip; Schlünzen, Niclas; Bonitz, Michael | Here, we present new results on the ultrafast electronic response of these systems following an optical laser excitation. | Session 22: Correlations in Graphene |

268 | Dipole-active collective excitations in moiré flat bands as a probe of the correlated insulating and superconducting states | Fahimniya, Ali; Lewandowski, Cyprian; Levitov, Leonid | Using a toy Hubbard model for the correlated insulating (CI) order in a flat band, we predict that these high-frequency modes become strongly dipole-active upon the system undergoing charge ordering, with the low-frequency modes gapped out within the CI gap. | Session 22: Correlations in Graphene |

269 | Tuning electron correlation in magic-angle twisted bilayer graphene using Coulomb screening | Liu, Xiaoxue; Wang, Zhi; Watanabe, Kenji; Taniguchi, Takashi; Vafek, Oskar; Li, Jia | In this talk, we report a novel device geometry, where the magic-angle twisted bilayer graphene (tBLG) [1-2] and a Bernal bilayer graphene (BLG) are separated by an insulating barrier with thickness of 3nm. | Session 22: Correlations in Graphene |

270 | Floquet-Bloch Dynamics in Simple Systems | Fernando, Gayanath; Geilhufe, Richard | By periodically driving the electronic states of one- and two-dimensional systems, we obtain numerical solutions, without having to resort to a high frequency expansion. | Session 22: Correlations in Graphene |

271 | Electron correlation and non-Fermi-liquid behavior in minimally twisted bilayer graphene | Chou, Yang-Zhi; Wu, Fengcheng; Sau, Jay | We study the phenomena driven by electron-electron interactions in minimally twisted bilayer graphene (mTBLG) with a perpendicular electric field. | Session 22: Correlations in Graphene |

272 | Correlation Effect in ABC-TLG and hBN Superlattice Revealed by Infrared Photocurrent Spectroscopy | Yang, Jixiang; Chen, Guorui; Zhang, Yahui; Zhang, Qihang; Jiang, Lili; Li, Hongyuan; Lv, Bosai; Watanabe, Kenji; Taniguchi, Takashi; Shi, Zhiwen; Todadri, Senthil; Zhang, Yuanbo; wang, feng; Ju, Long | Here, we report a spectroscopy study of this system, using the Fourier-transform infrared (FTIR) photocurrent spectroscopy technique. | Session 22: Correlations in Graphene |

273 | Correlated insulator states in twisted bilayer graphene: Hartree-Fock studies | Liu, Jianpeng; Zhang, Shihao; Dai, Xi | We discuss the correlated insulator states in twisted bilayer graphene (TBG) using two different types of Hartree-Fock (methods: in the first method all energy bands are included in the self-consistent calculations ,but some approximation is made for the Fock operators; in the other method, we project Coulomb interactions onto flat bands, and performed unrestricted Hartree-Fock calculations in the subspace of the flat bands. | Session 22: Correlations in Graphene |

274 | Correlated states in the graphene moiré ABC trilayer-hBN | Bascones, Elena; Camjayi, Alberto; Calderon, Maria | Starting from a Wannier function representation [2] we have studied the nature of the correlated states, including the doping and field dependence, with particular emphasis on their Mott character. | Session 22: Correlations in Graphene |

275 | Electronic correlations in twisted bilayer graphene | Calderon, Maria; Camjayi, Alberto; Civelli, Marcello; Rozenberg, Marcelo; Bascones, Elena | To address their origin we have calculated [1] the interactions between the Wannier functions of the 8-orbital model proposed for TBG [2] as a function of twist angle and proximity of the gates. | Session 22: Correlations in Graphene |

276 | Nematic and quantum valley Hall states in twisted bilayer graphene | Zhang, Shihao; Liu, Jianpeng | Here, we use unrestricted Hartree-Fock variational method both in the original basis and in the projected-flat-band basis to study the correlated insulator and quantum anomalous Hall (QAH) states twisted monolayer-bilayer graphene. | Session 22: Correlations in Graphene |

277 | Resolving topological classification through topological defects | Nayak, Abhay; Reiner, Jonathan; Queiroz, Raquel; Fu, Huixia; Shekhar, Chandra; Yan, Binghai; Felser, Claudia; Avraham, Nurit; Beidenkopf, Haim | Bulk boundary correspondence has been the cornerstone in the study of topological quantum materials. | Session 23: Defects in Topological Materials |

278 | Anomalous and normal dislocation modes in Floquet topological insulators | Nag, Tanay; Roy, Bitan | Here we theoretically demonstrate that dislocations, ubiquitous lattice defects in crystals, can probe Floquet topological and an unconventional $\pi$-trivial insulators in the bulk of a driven quantum system by supporting normal and anomalous modes at its core. | Session 23: Defects in Topological Materials |

279 | Tuning Fermi Levels in Intrinsic Antiferromagnetic Topological Insulators MnBi2Te4 and MnBi4Te7 by Defect Engineering and Chemical Doping | Du, Mao-Hua; Yan, Jiaqiang; Cooper, Valentino; Eisenbach, Markus | We predict that a Te-rich growth condition should reduce the bulk free electron density, which is confirmed by experimental synthesis and transport measurements in MnBi 2Te 4. | Session 23: Defects in Topological Materials |

280 | Band structure and end states in InAs/GaSb core-shell-shell nanowires | Viñas Boström, Florinda; Tsintzis, Athanasios; Hell, Michael; Leijnse, Martin | We investigate electron-hole hybridization and the fate of the QSH effect in a quasi-1D geometry, realized in a core-shell-shell (CSS) nanowire with an insulator core and InAs,GaSb shells. | Session 23: Defects in Topological Materials |

281 | Atom by atom: realization of robust corner states in an electronic breathing Kagome lattice | Slot, Marlou; Kempkes, Sander; van den Broeke, Jette; Capiod, Pierre; Benalcazar, Wladimir; Bercioux, Dario; Vanmaekelbergh, Daniel; Morais Smith, Cristiane; Swart, Ingmar | In particular, we will show the realization of an electronic breathing Kagome lattice. | Session 23: Defects in Topological Materials |

282 | Localized spin-orbit polaron in magnetic Weyl semimetal Co3Sn2S2 | Xing, Yuqing; Jian Lei, Shen; Chen, Hui; Huang, Li; Gao, Yuxiang; Zheng, Qi; Zhang, Yu-Yang; Li, Geng; Hu, Bin; Lei, Hechang; Ji, Wei; Du, Shixuan; Lin, Xiao; Liu, Enke; Shen, Baogen; Wang, Ziqiang; Gao, Hongjun | Here, using spin-polarized scanning tunneling microscopy/spectroscopy (STM/S) and non-contact atomic force microscopy (nc-AFM) combined with first-principle calculations, we report the discovery of localized spin-orbit polarons (SOPs) with three-fold rotation symmetry nucleated around single S-vacancies in Co 3Sn 2S 2. | Session 23: Defects in Topological Materials |

283 | Robust electronic states due to inhomogeneous spin-orbit couplings in graphene heterostructure | Touchais, Jean-Baptiste; Simon, Pascal; Mesaros, Andrej | In particular, we investigate numerically and analytically several types of inhomogeneous spin-orbit coupling terms in graphene. | Session 23: Defects in Topological Materials |

284 | Nanoscale Conducting and Insulating Domains on YbB6 | Coe, Aaron; zhu, Zhihuai; He, Yang; Kim, Dae-Jeong; Fisk, Zachary; Hoffman, Jenny | We observe several coexisting nanoscale surface terminations that can be identified by the relative downward or upward band bending determined by the surface polarity. | Session 23: Defects in Topological Materials |

285 | Bulk Electrical Transport studies of Magnetically doped SmB6 | Horn, Jarryd; Eo, Yun Suk; Saha, Shanta; Furhman, Wesley; O’Sullivan, Samantha; Mihaliov, Dmitri; Kurdak, Cagliyan; Fuhrer, Michael | In this talk, we present bulk transport studies using the inverted resistance method and Hall effect on various Fe-, Gd- and Nd-doped SmB 6 single crystals to partially answer these questions. | Session 23: Defects in Topological Materials |

286 | Mn/Bi site mixing and complex magnetic structure in MnBi2Te4 | Liu, Yaohua; Yan, Jiaqiang | In this work, we have performed a detailed study on the chemical and magnetic structures of MnBi 2Te 4 via single-crystal neutron diffraction at beamline CORELLI, SNS. | Session 23: Defects in Topological Materials |

287 | Soliton Dynamics in Interacting Double SSH chains | Choi, JinHyung; Cheon, Sangmo | In this work, we considered a double SSH chain model having an interchain coupling and studied kink-antikink collisions using double phi^4 model. | Session 23: Defects in Topological Materials |

288 | Dislocation as a bulk probe of higher-order topological insulators | Juricic, Vladimir; Roy, Bitan | We theoretically demonstrate that dislocations, ubiquitous defects in crystalline materials, can probe higher-order topology [1]. | Session 23: Defects in Topological Materials |

289 | Identifying Non-centrosymmetric Electronic Structures of Defect in Tungsten Ditelluride | Chen, Wan-Hsin; Kawakami, Naoya; Lin, Jhe-Jhih; Huang, Hsiang-I; Arafune, Ryuichi; Takagi, Noriaki; Lin, Chunliang | By using scanning tunneling microscope (STM) and density functional theory (DFT) calculation, we investigated both geometric and electronic structures of the defects in WTe 2. | Session 23: Defects in Topological Materials |

290 | Spin-polarized STM study of topological magnet and quantum impurity | Shumiya, Nana; Yin, Jiaxin; Jiang, Yuxiao; Zhou, Huibin; Macam, Gennevieve; Mohammad Sura, Hano Omar; Wang, Ziqiang; Jia, Shuang; Hasan, Zahid | We have developed vector magnetic field based scanning tunneling microscopy/spectroscopy (STM/S) technique to probe and discover topological magnets [1-2]. | Session 23: Defects in Topological Materials |

291 | A spectral scheme for Kohn-Sham Density Functional Theory of helical structures | Agarwal, Shivang; Banerjee, Amartya | Based on the observation that one of the most successful methods for solving the Kohn-Sham equations for periodic systems – the plane-wave method – is a spectral method based on eigenfunction expansion, we formulate and implement a spectral method designed towards solving the Kohn-Sham equations for helical structures. | Session 24: Density Functional Theory and Beyond |

292 | Dissociation limit and the scaled-down self-interaction correction | Adhikari, Santosh; Santra, Biswajit; Withanage, Kushantha; Jackson, Koblar; Ruzsinszky, Adrienn | In this work we are investigating the behavior of this recently proposed scheme on the dissociation of heteronuclear molecules. | Session 24: Density Functional Theory and Beyond |

293 | Kinetic energy density using machine learning for orbital-free density functional calculations | Al Ghadeer, Mohammed; Al-Aswad, Abdulaziz; Alharbi, Fahhad | This work can provide an important step toward more accurate large-scale orbital free density functional theory (OFDFT) calculations. | Session 24: Density Functional Theory and Beyond |

294 | Machine learning accurate exchange and correlation functionals of the electronic density | Dick, Sebastian; Fernandez, Marivi | Here, we review recent efforts to use machine learning (ML) methods for the creation of density functionals. | Session 24: Density Functional Theory and Beyond |

295 | Data-Driven Exchange-Correlation Functional Design for Transferability and Interpretability | Bystrom, Kyle; Kozinsky, Boris | To this end, we introduce two developments to design functionals that are transferable, obey exact theoretical constraints, and have separate exchange and correlation parts. | Session 24: Density Functional Theory and Beyond |

296 | New approximations for the exchange-correlation potential using connector theory | Aouina, Ayoub; Gatti, Matteo; Reining, Lucia | In this talk we propose a new approximation to the xc potential using a general approach called "Connector Theory" (COT) [2]. | Session 24: Density Functional Theory and Beyond |

297 | Enhancing the accuracy of interior-scaled Perdew-Zunger self-interaction correction | Bhattarai, Puskar; Santra, Biswajit; Wagle, Kamal; Yamamoto, Yoh; Zope, Rajendra; Jackson, Koblar; Perdew, John | Here we propose a new scaling factor to use in an LSIC-like approach that satisfies an additional important constraint: the correct coefficient of Z in the asymptotic expansion of the exchange-correlation (xc) energy for atoms of atomic number Z, which is neglected by LSIC. | Session 24: Density Functional Theory and Beyond |

298 | Accelerate stochastic calculation of random-phase approximation correlation energy difference with atom-based correlated sampling | Chi, Yu-Chieh; Huang, Chen | Methods developed in this work are expected to be useful for calculating energy differences between systems that mainly differ in certain local regions, such as calculating adsorption energies of molecules on metal surfaces for surface catalysis. | Session 24: Density Functional Theory and Beyond |

299 | Can the Hartree-Fock kinetic energy exceed the true kinetic energy? | Crisostomo, Steven; Levy, Mel; Burke, Kieron | Beginning from a generalized virial theorem derived from density scaling considerations, we derive a general expression for the kinetic energy difference, that applies to all systems. | Session 24: Density Functional Theory and Beyond |

300 | Self-consistency in the Fermi-Löwdin orbital self-interaction correction method using the Krieger-Li-Iafrate approximation | Diaz, Carlos; Baruah, Tunna; Zope, Rajendra | In this talk we present a self-consistent implementation of FLO-PZ-SIC using the Krieger-Li-Iafrate approximation (KLI) to the optimized effective potential (OEP) and compare it to Jacobi-like self-consistent implementation of Pederson et al. [1]. | Session 24: Density Functional Theory and Beyond |

301 | Assessing Local Hybrid Density Functionals for the Prediction of Exchange Coupling Constants in Transition Metal Complexes | Fitzhugh, Henry; Furness, James; Sun, Jianwei | Here we examine the performance of local hybrid and meta-GGA functionals, including the new r 2SCAN functional, for the prediction of coupling parameters in several di-nuclear transition metal complexes. | Session 24: Density Functional Theory and Beyond |

302 | Towards an orbital-free kinetic energy density functional for molecular systems | Akin-Ojo, Omololu | Towards an orbital-free kinetic energy density functional for molecular systems | Session 24: Density Functional Theory and Beyond |

303 | Building a database of two-dimensional material properties using the SCAN functional | Ataca, Can; Wines, Daniel; Chaney, Gracie; Kropp, Jaron; Ersan, Fatih | Our goal is to benchmark these results and create a full database to determine how SCAN performs compared to other well established DFT functionals. | Session 24: Density Functional Theory and Beyond |

304 | Non-additive kinetic potential functional Vnad from analytic inversion: all-electron and pseudopotential calculations | Banafsheh, Mojdeh; Kronik, Leeor; Gould, Tim; Wesolowski, Tomasz; Strubbe, David | We discuss the constraints on the choice of electron densities to ensure their admissibility. | Session 24: Density Functional Theory and Beyond |

305 | Investigation of Electronic and Optical Properties of Copper-Cysteamine with Halogens | Alkhaldi, Noura; Huda, Muhammad; Chen, Wei; Pandey, Nil Kanatha; Zhang, Manbo | In this presentation, density functional theory (DFT) is used to study the electronic and optical properties of Cu-Cy-X, with X= F, Cl, Br, I. | Session 24: Density Functional Theory and Beyond |

306 | Absolutely Localized Open-shell WF-in-DFT Huzinaga Embedding | Graham, Daniel; Wen, Xuelan; Chulhai, Dhabih; Goodpaster, Jason | More robust wave function (WF) methods can provide higher accuracy, but that accuracy comes at a significant computational cost. | Session 24: Density Functional Theory and Beyond |

307 | Accurate and numerically efficient r2SCAN meta-generalized gradient approximation | Furness, James; Kaplan, Aaron; Ning, Jinliang; Perdew, John; Sun, Jianwei | We present the r 2SCAN functional [3] that restores exact constraint adherence while preserving regularisation. | Session 24: Density Functional Theory and Beyond |

308 | Computation of Phonon-Mediated Resistivity in Sr2RuO4 from first principles | Goudreault, Felix Antoine; Ponce, Samuel; Giustino, Feliciano; Cote, Michel | Computation of Phonon-Mediated Resistivity in Sr2RuO4 from first principles | Session 24: Density Functional Theory and Beyond |

309 | Assessing the sensitivity of electron momentum densities and Fermi surfaces to different exchange-correlation approximations. | Harris-Lee, Eddie; James, Alyn; Dugdale, Stephen | By performing various calculations (including SCAN [2] and QSGW [3]) we have investigated the extent to which this discrepancy, as well as those in other materials, can be attributed to the exchange-correlation approximation. | Session 24: Density Functional Theory and Beyond |

310 | Recent developments in PyProcar: A Python library for electronic structure pre/post-processing | Herath, Uthpala; Tavadze, Pedram; Xu, He; Bousquet, Eric; Singh, Sobhit; Boucher, Reese; Lang, Logan; Farah, Freddy; Muñoz, Francisco; Romero, Aldo | We present our recent updates to PyProcar, a robust, open-source Python package providing graphical representations for electronic structure calculations. | Session 24: Density Functional Theory and Beyond |

311 | Embedded cluster density approximation for exchange-correlation energy | Huang, Chen | We have developed a local correlation method in the framework of Kohn-Sham density functional theory (KS-DFT). | Session 24: Density Functional Theory and Beyond |

312 | Asymptotic behavior of the exchange-correlation energy density and the Kohn-Sham potential in density functional theory: exact results and strategy for approximations | Kraisler, Eli | In this talk I focus on two such exact properties: the asymptotic behavior of the xc energy density per particle, e xc(r), and the asymptotic behavior of the Kohn-Sham potential, v KS(r), in finite many-electron systems. | Session 24: Density Functional Theory and Beyond |

313 | The Fermi-Löwdin orbital self-interaction correction (FLO-SIC) method with periodic boundary conditions | Jackson, Koblar; Peralta, Juan; Withanage, Kushantha; Johnson, Alexander; Baruah, Tunna; Papaconstantopoulos, Dimitrios; Perdew, John; Pederson, Mark | In this talk we describe how FLO-SIC can be extended to systems with three-dimensional periodicity. | Session 24: Density Functional Theory and Beyond |

314 | Self-Interaction Correction in F-Electron Systems | Johnson, Alexander; Shahi, Chandra; Pederson, Mark | [1] The work presented here utilized a newly developed tool for algorithmic parallelization of the solution of Poisson’s equation, and for selecting FODs within the Naval Research Laboratory Molecular Orbital Library (NRLMOL). | Session 24: Density Functional Theory and Beyond |

315 | Laplacian-level meta-GGA for the exchange-correlation energies of metals | Kaplan, Aaron; Perdew, John | I will discuss how exact constraints can be built into a Laplacian-level meta-GGA and the limitations inherent to the level of approximation. | Session 24: Density Functional Theory and Beyond |

316 | Self-Interaction Corrected Electronic Structure of a Cu-based Molecule using Fermi-Löwdin Orbitals | Karanovich, Anri; Yamamoto, Yoh; Jackson, Koblar; Park, Kyungwha | Self-Interaction Corrected Electronic Structure of a Cu-based Molecule using Fermi-Löwdin Orbitals | Session 24: Density Functional Theory and Beyond |

317 | Analysis of Finite-Temperature Thomas-Fermi Theory in One Dimension | Kozlowski, John; Fisher, Natali; Pribram-Jones, Aurora; Burke, Kieron | In recent decades, finite-temperature Density Functional Theory has proven very useful in its direct application to warm dense matter simulations. | Session 24: Density Functional Theory and Beyond |

318 | Accurate molecular geometries in complex excited-state potential energy surfaces with optimally-tuned range-separated hybrids | Kretz, Bernhard; Egger, David | In this work, we assess the precision of excited-state geometries obtained with TD-DFT and OT-RSH for a selection of organic molecules with varying complexity of their ES PES. | Session 24: Density Functional Theory and Beyond |

319 | DFT Studies of Phosphorene Nanostructures for DNA Sequencing | Henry, Matthew; Tayo, Benjamin | In this talk, we present the results of density functional theory (DFT) studies of the interaction of phosphorene nanomaterials with DNA bases. | Session 24: Density Functional Theory and Beyond |

320 | An efficient density functional for accurate molecular chemisorption and physisorption on transition metal surfaces | Kothakonda, Manish; Zhang, Ruiqi; Ning, Jinliang; Furness, James; Sun, Jianwei | In this work, we propose a new density functional [Opt(MS+rVV10)] by combining a semi-local meta-generalized gradient approximation (MGGA) Made Simple (MS) [1] with revised Vydrov-van Voorihs (rVV10) vdW correction[2], with two key parameters in MGGA-MS and one in rVV10 simultaneously refitted to the atomization energies of covalently bonded small molecules and the Ar 2 binding curve. | Session 24: Density Functional Theory and Beyond |

321 | Analyticity with respect to external potential in DFT and implications for Kohn-Sham computation | Lammert, Paul | I discuss the proof of this result and its significance for Kohn-Sham computation. | Session 24: Density Functional Theory and Beyond |

322 | Density Functional Theory Study of the Optical and Electronic Properties of With-Defect Semiconductors using a Tuned Screened Range-Separated Hybrid | Lewis, Kirk; Ramasubramaniam, Ashwin; Sharifzadeh, Sahar | Specifically, it has been shown that SRSH hybrid methods can approach the quantitative accuracy of MBPT at the cost of hybrid DFT for a variety of dissimilar molecules and both bulk and monolayer crystals. | Session 24: Density Functional Theory and Beyond |

323 | Accurately predicting electron affinities with Koopmans spectral functionals | Linscott, Edward; Colonna, Nicola; De Gennaro, Riccardo; Marzari, Nicola | They have already been shown to lead to accurate molecular ionization potentials [5], and I will present the latest results, including accurate predictions of molecular electron affinities in the GW100 set [6]. | Session 24: Density Functional Theory and Beyond |

324 | Optical absorption spectra from model exchange-correlation (XC) kernels | NEUPANE, SANTOSH; Nepal, Niraj; Ruzsinszky, Adrienn | We use model exchange-correlation (XC) kernels in the framework of time dependent density functional theory (TDDFT) to obtain the optical absorption spectra of different bulk materials. | Session 24: Density Functional Theory and Beyond |

325 | Band-gap of bulk solids and two-dimensional bent nanoribbons from first-principles | Neupane, Bimal; Tang, Hong; Nepal, Niraj; Ruzsinszky, Adrienn | In this work, we test the band-gap of bulk solids and 2D materials from semi-local functionals and the hybrid HSE06 functional. | Session 24: Density Functional Theory and Beyond |

326 | Barrier Heights of BH76 Database with PZ-SIC and Locally-scaled Self Interaction Correction Methods | Mishra, Prakash; Yamamoto, Yoh; Jackson, Koblar; Baruah, Tunna; Zope, Rajendra | We investigate the performance of the Perdew-Zunger (PZ) self-interaction correction (SIC) method and recent locally scaled SIC (LSIC) method[1] for predicting barrier heights in chemical reactions using the BH76 database. | Session 24: Density Functional Theory and Beyond |

327 | Quantifying and reducing different sources of errors in DFT calculations | Vuckovic, Stefan; Song, Suhwan; Sim, Eunji; Burke, Kieron | In this talk, I will describe a set of approaches for disentangling different sources of errors in approximate DFT calculations. | Session 24: Density Functional Theory and Beyond |

328 | Density sensitive analysis for evaluating density functional theory approximations to exchange-correlation energies | McCarty, Ryan J.; Vuckovic, Stefan; Song, Suhwan; Kozlowski, John; Sim, Eunji; Burke, Kieron | We developed a density sensitivity difference measure using theory from density-corrected Density Functional Theory that provides a physically-motivated comparison of exchange-correlation functional approximations. | Session 24: Density Functional Theory and Beyond |

329 | Accelerating the Fermi-Löwdin Orbital Descriptor Optimizations for Self-Interaction Free Density Functional Theory Calculations. | Zaman, Md Nageeb Bin; Jackson, Koblar; Peralta, Juan | The Fermi-Löwdin Self Interaction Correction (FLO-SIC) method was introduced to address the shortcomings of standard density functional approximation calculations by removing the spurious electron self-interaction [1-4]. | Session 24: Density Functional Theory and Beyond |

330 | A new method for initializing Fermi orbital descriptors for FLO-SIC calculations | Nguyen, Duyen; Jackson, Koblar; Perdew, John; Pederson, Mark; Peralta, Juan | Here we propose a novel generator for automatically initializing FODs without requiring much user input based on the minimization of a “pseudo energy” expression that involves a Coulomb electron density attraction, a FOD-FOD short-range repulsion, and an exchange-like density repulsion term. | Session 24: Density Functional Theory and Beyond |

331 | Fragment Electron Populations in Partition Density Functional Theory | Zhang, Kui; Wasserman, Adam | To perform this constrained minimization, we study a two-stage procedure in which the sum of fragment energies is lowered when electrons flow from fragments of lower electronegativity to fragments of higher electronegativity. | Session 24: Density Functional Theory and Beyond |

332 | Unharmonic adiabatic potential by short-range correlation effect enlarging C33 of crystalline graphite | Kusakabe, Koichi; Nagakubo, Akira; Ogi, Hirotsugu; Murashima, Kensuke; Murakami, Mutsuaki | In this presentation, after discussing relevance of the multi-reference extension of DFT[2] for beyond-RPA approaches, we open comparison among several +U approaches with the double-counting term. | Session 24: Density Functional Theory and Beyond |

333 | Efficient First-Principles Approach with a Pseudohybrid Density Functional for Extended Hubbard Interactions | Lee, Sang-Hoon; Son, Young-Woo | Here, to overcome such a problem, we present a DFT method that exploits self-consistent determinations of the on-site and inter-site Hubbard interactions (U and V ) simultaneously and obtain band gaps of diverse materials in the accuracy of GW method at a standard DFT computational cost. | Session 24: Density Functional Theory and Beyond |

334 | Reverse-Engineering the Exchange-Correlation hole for the SCAN and r2SCAN Functional | Lopez Macias, Luis; Perdew, John; Sun, Jianwei | We present a construction of the XC hole model for SCAN [1] and the recent r 2SCAN [2] by reverse engineering from known exact hole constraints. | Session 24: Density Functional Theory and Beyond |

335 | Beyond-DFT database of spectral function for correlated materials | Mandal, Subhasish; Haule, Kristjan; Rabe, Karin; Vanderbilt, David | As for qualitative predictions of excited-state properties usually require beyond-DFT methods, various methods going beyond DFT, such as meta-GGAs, hybrid functionals, GW, & DMFT have been developed to describe the electronic structure of correlated materials, but it is unclear how accurate these methods can be expected to be when applied to a given material. | Session 24: Density Functional Theory and Beyond |

336 | Constraint-based wave vector and frequency-dependent exchange-correlation kernel of the uniform electron gas | Ruzsinszky, Adrienn; Nepal, Niraj; Pitarke, Jose; Perdew, John | In this work a dynamic model exchange-correlation kernel, the MCP07 based on exact constraints is introduced [1]. | Session 24: Density Functional Theory and Beyond |

337 | Local scaled self-interaction-correction method using Fermi-Löwdin orbitals and a simple scaling factor | Romero, Selim; Yamamoto, Yoh; Baruah, Tunna; Zope, Rajendra | In this talk, we present the performance of the LSIC method using a simpler scaling factor was a ratio of orbital and spin densities in place of the ratio of kinetic energy densities z. | Session 24: Density Functional Theory and Beyond |

338 | Analyzing the Large Z Exchange Expansion | Redd, Jeremy; Cancio, Antonio | We calculate exact exchange energies using the Optimized Effective Potential (OEP) method for closed-shell atoms up to Z=120 and other standard DFT models up to 976. | Session 24: Density Functional Theory and Beyond |

339 | Local modified Becke-Johnson potential for low-dimensional systems | Rauch, Tomas; Marques, Miguel; Botti, Silvana | We propose an extension to the modified Becke-Johnson potential [1] that enables its use to study both heterogeneous and low-dimensional systems [2]. | Session 24: Density Functional Theory and Beyond |

340 | Conditional probability density functional theory | McCarty, Ryan J.; Perchak, Dennis; Pederson, Ryan; Evans, Robert; Qiu, Yiheng; White, Steven; Burke, Kieron | We present conditional probability (CP) density functional theory (DFT) as a formally exact theory. | Session 24: Density Functional Theory and Beyond |

341 | Bulk properties of semiconductors calculated with density functional theory and screened range-separated hybrids | Seidl, Stefan; Kretz, Bernhard; Gehrmann, Christian; Egger, David | The SRSH approach uses a single empirical parameter, where the range separation is tuned in such a way that SRSH reproduces the GW band gap [1]. | Session 24: Density Functional Theory and Beyond |

342 | On the relationship between the Kohn-Sham potential, the Pauli potential, and the Exact Electron Factorization | Schild, Axel; Kocák, Jakub; Kraisler, Eli | On the relationship between the Kohn-Sham potential, the Pauli potential, and the Exact Electron Factorization | Session 24: Density Functional Theory and Beyond |

343 | A simple self-interaction correction to the RPA+ correlation energy | Ruan, Shiqi; Ren, Xinguo; Gould, Tim; Ruzsinszky, Adrienn | Within this work, we have introduced a simple correction to the RPA+ correlation energy (mgRPA+) to make it exact for a single-electron system [2,3]. | Session 24: Density Functional Theory and Beyond |

344 | Improving density functional calculations of molecular polarizabilities using locally scaled self-interaction corrections. | Sharkas, Kamal; Akter, Sharmin; Vargas, Jorge; Peralta, Juan; Jackson, Koblar; Baruah, Tunna; Zope, Rajendra | Using a recent benchmark static polarizabilities database, we examine the effect of self-interaction errors (SIE) in the molecular polarizabilities at the level of the local density approximation (LSDA). | Session 24: Density Functional Theory and Beyond |

345 | Effect of the oxygen coverage on the electronic and magnetic properties of Cr2N MXene | Ponce Perez, Rodrigo; Moreno Armenta, María; Guerrero Sanchez, Jonathan | We show an effective way to tune the electronic properties of Cr 2N modifying the O coverage, laying the foundations to use these materials in the spintronics industry. | Session 24: Density Functional Theory and Beyond |

346 | Surface structures of magnetostrictive D03-Fe3Ga(001) | Ruvalcaba, Ricardo; Corbett, Joseph; Mandru, Andrada-Oana; Takeuchi, Noboru; Smith, Arthur; Guerrero Sanchez, Jonathan | Surface analysis demonstrates two thermodynamically stable surfaces, the ideal FeGa-terminated 1×1 and the Ga-substituted 3×1. | Session 24: Density Functional Theory and Beyond |

347 | Interpretations of ground-state symmetry breaking and strong correlation in wavefunction and density functional theories | Perdew, John; Ruzsinszky, Adrienn; Sun, Jianwei; Nepal, Niraj; Kaplan, Aaron | Time-dependent density functional theory is used to show quantitatively that the static charge density wave is a soft plasmon. | Session 24: Density Functional Theory and Beyond |

348 | Constrained Machine Learning de-orbitalization of meta-GGA exchange-correlation functionals | Pokharel, Kanun; Furness, James; Yao, Yi; Blum, Volker; Sun, Jianwei | We use deep neural network to construct a machine learned functional model that exploits this relationship to de-orbitalize SCAN (SCAN_ML) and augment it with by enforcing simple exact constraints on the model’s output. | Session 24: Density Functional Theory and Beyond |

349 | Removing Combinatorial Complexity for Systematic Initialization of Electronic Geometries for Fermi-Löwdin-Orbital Self-Interaction Corrections to Density Functional Approximations | Shahi, Chandra; Jackson, Koblar; Pederson, Mark | We describe a machine-human learning paradigm that reduces the combinatorial complexity associated with initiating FODs to a hierarchical screening approach that reduces the search to a series of single-atom calculations. | Session 24: Density Functional Theory and Beyond |

350 | Scaling down the Perdew-Zunger self-interaction correction to the first three rungs of the ladder of density functional approximations | Santra, Biswajit; Bhattarai, Puskar; Wagle, Kamal; Shahi, Chandra; Yamamoto, Yoh; Romero, Selim; Zope, Rajendra; Peralta, Juan; Jackson, Koblar; Perdew, John | The present work unambiguously shows that the largest errors of PZ SIC applied to standard functionals at three levels of approximation can be removed by restoring their correct slowly-varying density limits. | Session 24: Density Functional Theory and Beyond |

351 | Solid Calculations with Meta-GGA Accuracy at Little more than GGA Cost | Mejia-Rodriguez, Daniel; Trickey, Samuel | We provide validation data and discuss the remaining Laplacian-dependence issues, including the use of r 2SCAN-L in orbital-free DFT calculations. | Session 24: Density Functional Theory and Beyond |

352 | Variational optimization of Pauli potentials for orbital-free density functional theory. | Thapa, Bishal; Cancio, Antonio | In particular, the Perdew-Constantin metaGGA model [1] utilizes the Laplacian of the density to switch between slowly varying electron gas to the von Weizsacker or single electron-pair limits. | Session 24: Density Functional Theory and Beyond |

353 | Self-interaction errors in first-row transition metal molecular adsorption energies | Withanage, Kushantha; Sharkas, Kamal; Peralta, Juan; Jackson, Koblar | In this work we use the Fermi-Löwdin orbital (FLO) self interaction correction (SIC) method to compute adsorption energies of a series of small molecules on 3d transition metal cations. | Session 24: Density Functional Theory and Beyond |

354 | Study of weakly bound cluster anions using locally scaled and Perdew-Zunger self-interaction-correction methods. | Ufondu, Peter; Vargas, Jorge; Yamamoto, Yoh; Baruah, Tunna; Zope, Rajendra | Here we study weakly bound electrons in molecules and clusters using self-interaction-corrected density functional methods. | Session 24: Density Functional Theory and Beyond |

355 | On the importance of consistency between Hubbard parameters and projection manifolds in Hubbard-corrected density-functional theory | Timrov, Iurii; Marzari, Nicola | Having developed automated and reliable approaches for the non-empirical determination of the U and V parameters from density-functional perturbation theory [1], we highlight here the role played by the Hubbard manifold, comparing atomic orbitals (in different oxidation states and orthogonalized or not) and maximally localised Wannier functions. | Session 24: Density Functional Theory and Beyond |

356 | Machine learning the Hubbard U parameter in DFT+U using Bayesian optimization | Yu, Maituo; Yang, Shuyang; Wu, Chunzhi; Marom, Noa | We propose an approach to determining the optimal U parameters for a given material by machine learning. | Session 24: Density Functional Theory and Beyond |

357 | A linear-response approach for first-principles Hund’s J parameters: insights, oxides, and self-consistency | O’Regan, David; Orhan, Okan; Linscott, Edward; Moynihan, Glenn; Teobaldi, Gilberto | We describe the interpretation and calculation of its lesser-known counterpart, Hund’s J, as a measure instead of subspace static correlation error. | Session 24: Density Functional Theory and Beyond |

358 | Intra- and Inter-chain Pair Correlation Functions of Polymeric Fluids: A Comparison of Self-Consistent Polymer Reference Interaction Site Model and Polymer Density-Functional Theories | Wang, Yan; Zhang, Jiawei; Wang, Suyu; Wu, Jianzhong; Wang, Qiang | 118, 3835, 2003), enabling prediction of these quantities using polymer density-functional theories (PDFTs). | Session 24: Density Functional Theory and Beyond |

359 | Phosphorene and Silicene Nanodevices for DNA Sequencing: Ab Initio Studies | Henry, Matthew; Tumbapo, Mukesh; Tayo, Benjamin | Using density functional theory (DFT), we studied the interaction of DNA bases with finite-size nanomaterials from phosphorene and silicene. | Session 24: Density Functional Theory and Beyond |

360 | Visualizing orbital free models of the kinetic energy density in semiconductors | Shope, Brielle; Cancio, Antonio | We calculate the exact KED and electron density of semiconductor solids with varying ionicity and atomic number using the ABINIT DFT plane-wave pseudopotential code. | Session 24: Density Functional Theory and Beyond |

361 | Study of electron-transfer reactions using the oxidation-state constrained density functional theory (OS-CDFT) method | Sit, Patrick; Ku, Calvin | After that, we introduce its application to problems like electron transfer between solvated ferrous and ferric ions, polaron hopping in TiO 2 and in BiVO 4, and photoexcited electron transfer. | Session 24: Density Functional Theory and Beyond |

362 | Perdew-Zunger Self-Interaction Correction in Ion-Water Clusters | Wagle, Kamal; Santra, Biswajit; Bhattarai, Puskar; Shahi, Chandra; Perdew, John | We study the importance of self-interaction correction in density functional approximations for ion-water clusters, with different bonding patterns. | Session 24: Density Functional Theory and Beyond |

363 | First-Principle Studies of Silicene Nanostructures for DNA Base Detection | Tumbapo, Mukesh; Tayo, Benjamin | In this talk, we will present the results of our research findings. | Session 24: Density Functional Theory and Beyond |

364 | Applying connectivity twist averaging to quantum Monte Carlo and real solids | Mihm, Tina; Van Benschoten, William; Ramadugu, Sai; Grueneis, Andreas; Shepherd, James | We developed a method for the uniform electron gas (UEG) we termed connectivity twist averaging (cTA) that helps combat this increased cost. | Session 24: Density Functional Theory and Beyond |

365 | A Unified Framework for Polymer Density-Functional Theories and Some Numerical Issues with Their Applications to Tangent Hard-Sphere Chains | Zhang, Jiawei; Li, Baohui; Wu, Jianzhong; Wang, Qiang | Polymer density-functional theories (PDFTs) are able to predict microscopic details that are often neglected by the more widely used polymer self-consistent field theory (PSCFT), and provide more accurate equations of state due to the incorporation of compressibility and the correlation effects. | Session 24: Density Functional Theory and Beyond |

366 | Hydrodynamics and internodal tunnelling in Weyl semimetals in magnetic fields | Syzranov, Sergey; Bednik, Grigory; Zhu, Siyu; Tikhonov, Konstantin | This work explores electron transport in Weyl semimetals in the presence of magnetic field and charged impurities in various regimes of impurity concentrations and the magnitude of the field. | Session 25: Dirac and Weyl Semimetals: Materials and Modeling — Transport |

367 | Electron and spin dynamics in Dirac semimetals from first principles | Desai, Dhruv; Park, Jinsoo; Zhou, Jin-Jian; Bernardi, Marco | In this talk, we will present first-principles calculations of the electron mobility (and its governing scattering mechanisms), magneto-transport and spin relaxation times in selected Dirac semimetals. | Session 25: Dirac and Weyl Semimetals: Materials and Modeling — Transport |

368 | Spin-valley locking bulk quantum Hall effect in a Dirac semimetal BaMnSb2 | Liu, Jinyu; Yu, Jiabin; Ning, Jinliang; Yi, Hemian; Miao, Leixin; Min, Lujin; Zhao, Yifan; Ning, Wei; Zhu, Yanglin; Pillsbury, Timothy; Zhang, Yubo; Hu, Jin; Cao, Huibo; Balakirev, Fedor; Weickert, Dagmar; Jaime, Marcelo; Yang, Kun; Sun, Jianwei; Alem, Nasim; Gopalan, Venkatraman; Chang, Cui-Zu; Samarth, Nitin; Liu, Chaoxing; McDonald, Ross; Mao, Zhiqiang | In this talk, we report a non-centrosymmetric Dirac semimetal BaMnSb 2 is characterized by spin-valley locking [1]. | Session 25: Dirac and Weyl Semimetals: Materials and Modeling — Transport |

369 | Spin-valley coupling sensitive to lattice distortion in layered Dirac metal BaMnX2 (X = Bi, Sb) | Kondo, Masaki; Ochi, Masayuki; kojima, Tatsuhiro; Kurihara, Ryosuke; Sekine, Daiki; Matsubara, Masakazu; Miyake, Atsushi; Tokunaga, Masashi; Kuroki, Kazuhiko; Murakawa, Hiroshi; Hanasaki, Noriaki; Sakai, Hideaki | In this talk, we report the spin-valley coupling is tunable in the layered semimetal BaMn X 2 ( X = Bi, Sb), where the distorted X square net layer with in-plane polarization realizes the spin-valley coupled Dirac fermion. | Session 25: Dirac and Weyl Semimetals: Materials and Modeling — Transport |

370 | Large enhancement of thermopower at low magnetic field in compensated semimetals | Feng, Xiaozhou; Skinner, Brian | Previous work has shown that Dirac/Weyl semimetals with a single pocket of carriers can exhibit a large enhancement of thermopower when the system reaches the extreme quantum limit, where only a single Landau level is occupied. | Session 25: Dirac and Weyl Semimetals: Materials and Modeling — Transport |

371 | Grain Size Dependence of Transverse Thermoelectric Transport in the Weyl Semimetal NbP | Scott, Eleanor; Schlaak, Katherine; Fu, Chenguang; Khodabakhsh, Safa; Guin, Satya; Paz y Puente, Ashley; Felser, Claudia; Watzman, Sarah | In this work, we present a grain size study on bulk polycrystalline samples of NbP, where different annealing times result in varying grain sizes. | Session 25: Dirac and Weyl Semimetals: Materials and Modeling — Transport |

372 | TOPOLOGICAL PROTECTION OF WEYL FERMIONS VISUALIZED ON THE ATOMIC SCALE | Beidenkopf, Haim; Avraham, Nurit; Morali, Noam; Batabyal, Rajib; Nayak, Abhay; Kumar Nag, Pranab; Yan, Binghai; Felser, Claudia | We have confirmed the Weyl topological classification of both the inversion symmetry broken compound TaAs [2] and the time reversal symmetry broken Co3Sn2S2 [3] by spectroscopic visualization of their Fermi-arc surface states through the interference patterns those electrons embed in the local density of states. | Session 25: Dirac and Weyl Semimetals: Materials and Modeling — Transport |

373 | Origin of extremely large non-saturating magnetoresistance in topological and trivial semimetals | Zhang, Shengnan; Wu, QuanSheng; Liu, Yi; Yazyev, Oleg | We show that in all cases we investigated charge carrier compensation and open-orbit mechanisms are responsible for non-saturating magnetoresistance. | Session 25: Dirac and Weyl Semimetals: Materials and Modeling — Transport |

374 | Giant magnetoresistance and CDW instability in the quantum limit of correlated Dirac semimetal CaIrO3 | Yamada, Rinsuke; Fujioka, Jun; Kawamura, Minoru; Sakai, Shiro; Hirayama, Motoaki; Arita, Ryotaro; Okawa, Tatsuta; Hashizume, Daisuke; Sato, Takuro; Kagawa, Fumitaka; Kurihara, Ryosuke; Tokunaga, Masashi; Tokura, Yoshinori | In this study, we report the magnetoresistance up to 55 T for CaIrO 3, which is a strongly-correlated Dirac semimetal on the verge of Mott transition[1,2]. | Session 25: Dirac and Weyl Semimetals: Materials and Modeling — Transport |

375 | Nonlinear Hall effect in the spin-valley locked Dirac semimetal BaMnSb2 | Min, Lujin; Gopalan, Venkatraman; Mao, Zhiqiang | In this talk, we will report a bulk NLHE in a spin-valley locked Dirac semimetal BaMnSb 2 [3]. | Session 25: Dirac and Weyl Semimetals: Materials and Modeling — Transport |

376 | Anomalous Hall effect and Lifshitz transition in ZrTe5 | Mercado, Pedro; Aryal, Niraj; Yin, Weiguo; Valla, Tonica; Gu, Genda; Li, Qiang | We report measurements of the Anomalous Hall Effect in ZrTe 5 at different stages of a temperature induced Lifshitz transition, in which the Fermi level decreases with increasing temperature. | Session 25: Dirac and Weyl Semimetals: Materials and Modeling — Transport |

377 | Spin fluctuation induced Weyl semimetal state in the paramagnetic phase of EuCd2As2 | Shi, Ming | Here, using photoemission spectroscopy, we observe that the degeneracy of Bloch bands is already lifted in the paramagnetic phase of EuCd 2As 2. | Session 26: Dirac and Weyl Semimetals: Materials and Modeling–Magnetic Weyl Semimetals |

378 | Topological Nodal Planes in Magnetic Space Groups | Hirschmann, Moritz; Alpin, Kirill; Wilde, Marc; Dodenhöft, Matthias; Niedermayr, Arthur; Bauer, Andreas; Pfleiderer, Christian; Schnyder, Andreas | In the present work we discuss an extension to two-dimensional nodal features. | Session 26: Dirac and Weyl Semimetals: Materials and Modeling–Magnetic Weyl Semimetals |

379 | Tunable Berry Curvature Effects Through Volume-wise Magnetic Competition in a Topological Kagome Magnet Co3Sn2S2 | Guguchia, Zurab; Verezhak, Joel; Gawryluk, Dariusz; Tsirkin, Stepan; Yin, Jiaxin; Belopolski, Ilya; Zhou, Huibin; Simutis, Gediminas; Zhang, Songtian; Cochran, Tyler; Chang, Guoqing; Pomjakushina, Ekaterina; Keller, Lukas; Skrzeczkowska, Zuzanna; Wang, Qi; Lei, Hechang; Khasanov, Rustem; Amato, Alex; Jia, Shuang; Neupert, Titus; Luetkens, Hubertus; Hasan, Zahid | Using muon spin-rotation, we present evidence for competing magnetic orders in the kagome lattice of this compound. | Session 26: Dirac and Weyl Semimetals: Materials and Modeling–Magnetic Weyl Semimetals |

380 | Understanding chemical bonding in adatom configurations on the surface of the magnetic Weyl semi-metal Co3Sn2S2 with machine learning, 3D scanning tunneling spectroscopy, and first-principles calculations | Roccapriore, Kevin; Zou, Qiang; Xue, Rui; Ziatdinov, Maxim; Fu, Mingming; Mandrus, David; Yoon, Mina; Sumpter, Bobby; Gai, Zheng; Kalinin, Sergei | Here we develop a machine learning workflow that combines supervised learning in the spatial domain and unsupervised learning in the energy domain that, with direct comparison to first-principles calculations performed in-tandem, allows an enhanced understanding of the elemental composition and chemical bonding nature of the adatoms and their configurations. | Session 26: Dirac and Weyl Semimetals: Materials and Modeling–Magnetic Weyl Semimetals |

381 | The magnetic order, tunable spin-canting, and band structure of a candidate Weyl semi-metal | Taddei, Keith; Sanjeewa, Duminda; YIN, LI; Xing, Jie; Dela Cruz, Clarina; Sefat, Athena; Parker, David | In this talk we will discuss the study of one such candidate material, elucidate its magnetic structure, provide a possible mechanism to optimize that structure for the Weyl physics and reveal how the magnetic symmetry tunes the electronic band structure. | Session 26: Dirac and Weyl Semimetals: Materials and Modeling–Magnetic Weyl Semimetals |

382 | The effects of strain on the topology of EuCd2As2 | Valadkhani, Adrian; Song, Young-Joon; Valenti, Roser | By the analysis with a low-energy effective Hamiltonian, we calculate the topological properties as a function of strain. | Session 26: Dirac and Weyl Semimetals: Materials and Modeling–Magnetic Weyl Semimetals |

383 | Large Anamolous Hall Effect in New Weyl Semimetal Kagome System: Fe3Sn | Ghimire, Madhav; Belbase, Bishnu; Karki, Bishnu; Ye, Linda; You, Jhih-Shih; Facio, Jorge; Checkelsky, Joseph; Richter, Manuel; Van den Brink, Jeroen | Here, by means of density functional theory calculations, we have investigated the electronic, magnetic and topological properties of layered kagome metal Fe 3Sn. | Session 26: Dirac and Weyl Semimetals: Materials and Modeling–Magnetic Weyl Semimetals |

384 | Observation of Weyl fermions in a magnetic non-centrosymmetric crystal | Sanchez, Daniel; Chang, Guoqing; Belopolski, Ilya; Lu, Hong; Yin, Jiaxin; Alidoust, Nasser; Xu, Xitong; Cochran, Tyler; Zhang, Xiao; Bian, Yi; Zhang, Songtian; Liu, Yi-Yuan; Ma, Jie; Bian, Guang; Lin, Hsin; Xu, Suyang; Jia, Shuang; Hasan, Zahid | Here we report on the topological electronic properties in the non-centrosymmetric spin-orbit magnet PrAlGe by combining spectroscopy and transport measurements. | Session 26: Dirac and Weyl Semimetals: Materials and Modeling–Magnetic Weyl Semimetals |

385 | Defects in magnetic Weyl semimetal Co3Sn2S2 | Gai, Zheng; Zou, Qiang; Fu, Mingming; Yoon, Mina; Xue, Rui; Yan, Jiaqiang; Mandrus, David | In this presentation, we use low temperature high magnetic field scanning tunneling microscope, spin polarized STM, and quasiparticle interference (QPI) to study the influence of local defects to the Weyl nodes movement, including magnetic and nonmagnetic vacancies and adatoms. | Session 26: Dirac and Weyl Semimetals: Materials and Modeling–Magnetic Weyl Semimetals |

386 | Transport and Magnetism in Topological Materials | Checkelsky, Joseph | Here we describe our recent efforts to realize quantum materials in which this interplay manifests itself and discuss concepts of quantum material design that may allow for further exotica to be realized. | Session 26: Dirac and Weyl Semimetals: Materials and Modeling–Magnetic Weyl Semimetals |

387 | Exploring spin-canting in the Dirac semimetal, Ca1-xNaxMnBi2, with neutron diffraction measurements. | Sapkota, Aashish; Zaliznyak, Igor; Tranquada, John; Petrovic, Cedomir; Xu, Zhijun; Xu, Guangyong; Li, Yangmu | To understand whether the spin-canting is behind the anomalous resistivity bump, we performed neutron diffraction measurements on two members of Ca 1-xNa xMnBi 2, x = 0 and 0.05. | Session 26: Dirac and Weyl Semimetals: Materials and Modeling–Magnetic Weyl Semimetals |

388 | New insights into topological semimetals | Cano, Jennifer | I will discuss recent developments starting with the classification of nodal fermions in both magnetic and non-magnetic space groups. | Session 27: Dirac and Weyl Semimetals: Materials and Modeling–Materials Predictions and Transport Theory |

389 | Topological properties of buckled 2D hoyneycomb group-V elements | Radha, Santosh; Lambrecht, Walter | Here we show that the buckled lowest energy form at the end of this series of topological transitions is a weak topological crystalline insulator (TCI) in the obstructed atomic limit (OAL). | Session 27: Dirac and Weyl Semimetals: Materials and Modeling–Materials Predictions and Transport Theory |

390 | Ferromagnetic Weyl Fermions in Two-Dimensional Layered Electride Gd2C | Liu, Shuyuan; Wang, Chongze; Cho, Jun-Hyung | Here, based on first-principles calculations, we discover a time-reversal-symmetry-breaking Weyl semimetal phase in a unique two-dimensional layered ferromagnetic (FM) electride Gd 2C. | Session 27: Dirac and Weyl Semimetals: Materials and Modeling–Materials Predictions and Transport Theory |

391 | Effect of disorder on the transverse magnetoresistance of Weyl semimetals | Rodionov, Yaroslav; Kugel, Kliment; Aronzon, Boris; Nori, Franco | We study the effect of random potential created by different types of impurities on the transverse magnetoresistance of Weyl semimetals. | |

392 | Nonreciprocal Thermal Radiation from Magnetic Weyl Semimetals | Zhao, Bo; Guo, Cheng; Garcia, Christina; Narang, Prineha; Fan, Shanhui | Here we show that the axion electrodynamics in magnetic Weyl semimetals can be used to construct strongly nonreciprocal thermal emitters [3]. | |

393 | The nature of the Zeeman effect and field-induced topological semimetals | Dai, Xi | In the present talk, I will propose a new way to classify centrosymmetric metals by studying the Zeeman effect caused by an external magnetic field described by the momentum dependent g-factor tensor on the Fermi surfaces. | |

394 | First-Principles Design of Halide-Reduced Electrides with Magnetism and Topological Phases | Yu, Tonghua; Hirayama, Motoaki; Flores Livas, Jose; Nomoto, Takuya; Arita, Ryotaro | In this presentation, we primarily report two families of newly designed electrides, A 2C 2 and A 2Ge ( A= Y, Gd, etc.), both of which turn out to be topological nodal line semimetals in the absence of spin-orbit coupling. | |

395 | NdAlSi, a type II magnetic Weyl semimetal | Baidya, Santu; Vanderbilt, David; Gaudet, Jonathan; Yang, Hung-Yu; Tafti, Fazel; Broholm, Collin | We focus on NdAlSi due to its interesting magnetic and electronic properties. | |

396 | Twofold degenerate quadruple Weyl nodes in chiral cubic crystals | Zhang, Tiantian; Takahashi, Ryo; Fang, Chen; Murakami, Shuichi | Afterward, a series of LaIrSi-type materials that have the TQW in both their spinless electronic band structure and the phonon spectra will be discussed. | |

397 | High-throughput screening for Weyl Semimetals with S4 Symmetry | Gao, Jiacheng; Qian, Yuting; Nie, Si-Min; Wang, Zhijun; Weng, Hongming; Fang, Zhong | In this work, we propose a new topological invariant χ for the systems with S4 symmetry [i.e., the improper rotation S4 (≡ IC4z) is a proper four-fold rotation (C4z) followed by inversion (I)], which can be used to diagnose the Weyl semimetal phase. | |

398 | Magnetoresistance from Guiding Center Drift of Two-Dimensional Electrons in a Smooth Disorder Potential | Pozderac, Calvin; Skinner, Brian | Here we address this issue by studying the magnetoresistance of 2D electrons in a smooth random potential, as created, for example, by charged impurities in the substrate. | |

399 | Quantized circular photocurrents in chiral topological semimetals | De Juan, Fernando | In this talk I will describe a surprising topological feature of the photogalvanic response to circularly polarized light: In chiral crystalline materials featuring point-like band crossings known as Weyl nodes, the circular photocurrent is exactly quantized in terms of fundamental constants only. | Session 28: Dirac and Weyl Semimetals: Materials and Modeling–Optical and Spectroscopy |

400 | The study of nonlinear responses in the chiral Weyl semimetal CoSi | Drueke, Elizabeth; Owen, Rachel; Day, Matthew; Gong, Yiming; Bates, Kelsey; Kerber, Grace; Chen, Lu; Li, Chenghe; Tian, Shangjie; Lei, Hechang; Li, Lu; Cundiff, Steven; Zhao, Liuyan | In this talk, I will present our experimental study of two second order nonlinear effects, SHG and photocurrent generation, in an archetypal chiral Weyl semimetal, CoSi. | Session 28: Dirac and Weyl Semimetals: Materials and Modeling–Optical and Spectroscopy |

401 | Photocurrent-driven transient symmetry breaking in the Weyl semimetal TaAs | Sirica, Nicholas; Orth, Peter; Scheurer, Mathias; Prasankumar, Rohit | Here, we use femtosecond optical pulses to transiently lower symmetry in the prototypical type-I Weyl semimetal TaAs. | Session 28: Dirac and Weyl Semimetals: Materials and Modeling–Optical and Spectroscopy |

402 | Optical Hall effect and anomalous dispersion of surface polaritons in Type-I Weyl semimetals | Belyanin, Alexey; Chen, QianFan; Erukhimova, Maria; Tokman, Mikhail; Kutayiah, Ryan; Oladyshkin, Ivan | We theoretically study the bulk and surface polariton modes in Type-I Weyl semimetals with broken time-reversal symmetry. | Session 28: Dirac and Weyl Semimetals: Materials and Modeling–Optical and Spectroscopy |

403 | Current-induced second harmonic generation in inversion-symmetric Dirac and Weyl semimetals | Takasan, Kazuaki; Morimoto, Takahiro; Orenstein, Joseph; Moore, Joel | In this talk, we will talk about our theoretical study of the SHG in inversion-symmetric Dirac and Weyl semimetals under a DC current which breaks the inversion symmetry by creating a nonequilibrium steady state [1]. | Session 28: Dirac and Weyl Semimetals: Materials and Modeling–Optical and Spectroscopy |

404 | Photon absorption of two-dimensional non-symmorphic Dirac semimetals | Chakraborty, Amarnath; Bian, Guang; Vignale, Giovanni | We find that the optical absorption coefficient depends strongly on the anisotropy factor and the photon polarization. | Session 28: Dirac and Weyl Semimetals: Materials and Modeling–Optical and Spectroscopy |

405 | Time-Resolved Pump-Probe and Kerr-Effect Spectroscopy of Collective Lattice Modes and Electronic Relaxation in Chiral Weyl Semimetals | Rai, Manita; Lu, Baozhu; Manna, Kaustuv; Borrmann, Horst; Felser, Claudia; Torchinsky, Darius | In this talk, we describe our time-resolved pump-probe and Kerr effect measurements of these phonon modes in space group 198 compounds and discuss our observations in terms of the electronic Weyl band structure. | Session 28: Dirac and Weyl Semimetals: Materials and Modeling–Optical and Spectroscopy |

406 | Circular dichroism in the angle-resolved photoemission spectra of the charge density wave Weyl semimetal (TaSe4)2I | Kim, So Yeun; Bielinski, Nina; Zhao, Chengxi; McKay, Robert; Bradlyn, Barry; Shoemaker, Daniel; Mahmood, Fahad | In this work, we explore the band structure of (TaSe 4) 2I in the proximity of Weyl nodes with high momentum resolution laser-based angle-resolved photoemission (ARPES). | Session 28: Dirac and Weyl Semimetals: Materials and Modeling–Optical and Spectroscopy |

407 | (TaSe4)2I: A Charge-Density-Wave Topological Semimetal | Shi, Wujun; Wieder, Benjamin J.; Meyerheim, Holger L.; Sun, Yan; Chen, Yulin; Felser, Claudia; Bernevig, Andrei; Wang, Zhijun | (2021)], we demonstrate that the room-temperature phase of (TaSe4) 2I is a Weyl semimetal with 24 pairs of Weyl nodes. | Session 28: Dirac and Weyl Semimetals: Materials and Modeling–Optical and Spectroscopy |

408 | NMR study of topological chalcogenide ZrTe5 | Tian, Yefan; Ghassemi, Nader; Ross, Joseph | In this work, we describe the results of 125Te NMR measurements vs crystal orientation on an aligned-crystal sample of the topological chalcogenide ZrTe 5. | Session 28: Dirac and Weyl Semimetals: Materials and Modeling–Optical and Spectroscopy |

409 | Direct Wavefunction Detection of Lattice Vibrations by Inelastic Neutron Scattering | Jin, Zhendong; Hu, Biaoyan; Liu, Yiran; Li, Yangmu; Zhang, Tiantian; Iida, Kazuki; Kamazawa, Kazuya; Kolesnikov, Alexander; Stone, Matthew; Zhang, Xiangyu; Chen, Haiyang; Wang, Yandong; Zaliznyak, Igor; Tranquada, John; Fang, Chen; Li, Yuan | In this talk, we will present the results of our Inelastic Neutron Scattering (INS) experiments on MnSi and CoSi crystals. | Session 28: Dirac and Weyl Semimetals: Materials and Modeling–Optical and Spectroscopy |

410 | Four-wave mixing in Weyl semimetals | Almutairi, Sultan; Chen, QianFan; Tokman, Mikhail; Belyanin, Alexey | Here we derive the third-order nonlinear optical conductivity of WSMs in the long-wavelength limit and calculate the intensity of the nonlinear four-wave mixing signal as it is transmitted through the WSM film or propagates away from the surface of the material in the reflection geometry. | Session 28: Dirac and Weyl Semimetals: Materials and Modeling–Optical and Spectroscopy |

411 | Electronic structure study of rare-earth monopnictide DySb | Dimitri, Klauss; Hosen, Md Mofazzel; Dhakal, Gyanendra; Wang, Baokai; Kabir, Firoza; Sims, Christopher; Regmi, Sabin; Singh, Bahadur; Sarkar, Anan; Agarwal, Amit; Bauer, Eric; Ronning, Filip; Bansil, Arun; Neupane, Madhab | In particular, here we present a combined study using angle-resolved photoemission spectroscopy (ARPES) and first-principles calculations on DySb. | Session 28: Dirac and Weyl Semimetals: Materials and Modeling–Optical and Spectroscopy |

412 | Quantum Hall signature of Weyl orbits in dual-gated Dirac semimetal film | Nishihaya, Shinichi; Uchida, Masaki; Nakazawa, Yusuke; Kriener, Markus; Taguchi, Yasujiro; Kawasaki, Masashi | In this talk, we report Weyl-orbit-induced intrinsic coupling between top and bottom surface states in the quantum Hall regime of a dual-gated Dirac semimetal film. | Session 29: Dirac and Weyl Semimetals: Materials and Modeling–Thin Films and Nanostructures |

413 | Toward the realization of chiral qubit: quantum computing with chirality | Li, Qiang; Kharzeev, Dmitri; Wang, JIGANG | In this talk, we report our investigations into several topological control principles driven by quantum coherence and understanding the time dependence of topological phase transition. | Session 29: Dirac and Weyl Semimetals: Materials and Modeling–Thin Films and Nanostructures |

414 | Magnetic Weyl semimetal Co3Sn2S2 thin flakes with high electron mobility and large anomalous Hall effect | Fujishiro, Yukako; Tanaka, Miuko; Mogi, Masataka; Kaneko, Yoshio; Yokosawa, Takamoto; Kanazawa, Naoya; Minami, Susumu; Koretsune, Takashi; Arita, Ryotaro; Tarucha, Seigo; Yamamoto, Michihisa; Tokura, Yoshinori | In this work [1], we report a synthesis of high-quality thin flakes of magnetic Weyl semimetal Co 3Sn 2S 2 by chemical vapor transport method. | Session 29: Dirac and Weyl Semimetals: Materials and Modeling–Thin Films and Nanostructures |

415 | Importance of interactions for the band structure of the topological Dirac semimetal Na3Bi | Di Bernardo, Iolanda; Collins, James; Wu, Weikang; Zhou, Ju; Yang, Shengyuan; Edmonds, Mark; Fuhrer, Michael | We find that density functional theory methods generally underestimate the electron velocities. | Session 29: Dirac and Weyl Semimetals: Materials and Modeling–Thin Films and Nanostructures |

416 | Energy Dependence of the Circular Photogalvanic Effect in the Weyl Semimetal NbIrTe4 | Pournia, Seyyedesadaf; Jnawali, Giriraj; Linser, Samuel; Abbasian Shojaei, Iraj; Jackson, Howard; Smith, Leigh; Le, Congcong; Zhang, Fu-Chun; Ortiz, Brenden; Wilson, Stephen | We have investigated the Circular Photogalvanic Effect (CPGE) in the orthorhombic ternary compound, NbIrTe 4. | Session 29: Dirac and Weyl Semimetals: Materials and Modeling–Thin Films and Nanostructures |

417 | Proximity Effect Induced Topological Superconductivity in CeBi Thin Films | Huang, Zhao; Lane, Christopher; Yarotski, Dmitry; Taylor, Antoinette; Zhu, Jian-Xin | In this work, we explore the possible emergence of topological superconductivity by sandwiching a CeBi thin film between two conventional superconductors like Niobium. | Session 29: Dirac and Weyl Semimetals: Materials and Modeling–Thin Films and Nanostructures |

418 | Coupling type II Weyl semimetal MoTe2 with a stronger s-wave superconductor: the competition with the inherent bulk superconducting condensate and the disloyal edge mode. | Kim, Stephan; Wang, Wudi; Lei, Shiming; Cava, Robert; Ong, N. Phuan | We report the effects of coupling the type II Weyl semimetal MoTe 2 with an s-wave superconductor that has a much larger superconducting gap. | Session 29: Dirac and Weyl Semimetals: Materials and Modeling–Thin Films and Nanostructures |

419 | Observation of the Dirac Semimetal Phase in MBE-grown ZrTe2 Thin Films with Tunable Source Laser-ARPES | Stanley, Max; Pillsbury, Timothy; Richardella, Anthony; Ou, Yongxi; Zheng, Boyang; Yi, Hemian; Rable, Jeffrey; Reifsnyder Hickey, Danielle; Alem, Nasim; Crespi, Vincent; Chang, Cui-Zu; Samarth, Nitin | Observation of the Dirac Semimetal Phase in MBE-grown ZrTe2 Thin Films with Tunable Source Laser-ARPES | Session 29: Dirac and Weyl Semimetals: Materials and Modeling–Thin Films and Nanostructures |

420 | Quantum transport in Dirac semimetal Cd3As2 thin films | Xiao, Run; Ghosh, Sayak; Mitra, Arpita; Yanez, Wilson; Pillsbury, Timothy; Fang, Yawen; Chamorro, Juan; Baidya, Santu; Berry, Tanya; Vanderbilt, David; Li, Yi; McQueen, Tyrel; Ramshaw, Brad; Samarth, Nitin | We have used MBE to grow thin films of Cd 3As 2 on GaAs (111)B substrates with a GaSb buffer layer. | Session 29: Dirac and Weyl Semimetals: Materials and Modeling–Thin Films and Nanostructures |

421 | Fabrication and magnetotransport measurements of ZrSiSe/CrGeTe3 heterostructures | Fereidouni, Arash; Basnet, Rabindra; Nabi, Md Rafique Un; Hu, Jin; Churchill, Hugh | We report the fabrication and transport measurements of ZrSiSe/CrGeTe3 heterostructures in which Hall bars are fabricated on thin flakes of ZrSiSe, an exfoliatable topological semimetal. | Session 29: Dirac and Weyl Semimetals: Materials and Modeling–Thin Films and Nanostructures |

422 | Electrical manipulation of a Weyl semimetallic state | Nakatsuji, Satoru | Here we demonstrate the electrical switching of a Weyl semimetal state and its detection by anomalous Hall effect (AHE) [7]. | Session 29: Dirac and Weyl Semimetals: Materials and Modeling–Thin Films and Nanostructures |

423 | Chiral kinetic theory of anomalous transport induced by torsion | LANLAN, GAO; Kaushik, Sahal; Kharzeev, Dmitri; Philip, Evan | We describe how the torsion generates the chiral chemical potential, and thus leads to the Chiral Magnetic Effect (CME) in the presence of a background magnetic field. | Session 30: Dirac and Weyl Semimetals: Optical and Transport Properties |

424 | Chiral electronics and effect of the external fields in topological semimetals | Baba, Yuriko; Diaz, Álvaro; Benito-Matías, Enrique; Platero, Gloria; Díaz, Elena; Domínguez-Adame, Francisco; Molina, Rafael | Chiral electronics and effect of the external fields in topological semimetals | Session 30: Dirac and Weyl Semimetals: Optical and Transport Properties |

425 | Optical signatures of multifold fermions in the chiral topological semimetals RhSi and CoSi | Sánchez Martínez, Miguel Ángel; XU, Bing; Fang, Zhenyao; Ni, Zhuoliang; Venderbos, Jorn; De Juan, Fernando; Mele, Eugene; Rappe, Andrew; Grushin, Adolfo; Wu, Liang | We use a tight-binding model for space group 198, where RhSi and CoSi crystallize, and obtain the parameters for both materials from first-principles calculations. | Session 30: Dirac and Weyl Semimetals: Optical and Transport Properties |

426 | Chiral anomaly induced Veselago lensing in Weyl semimetals | Tchoumakov, Serguei; Bujnowski, Bogusz; Cayssol, Jérôme; Grushin, Adolfo | In this poster we show that on the contrary to 2D materials, such as graphene, Veselago lensing can be observed separately for cones of opposite chirality in Weyl semimetals with the help of the chiral anomaly. | Session 30: Dirac and Weyl Semimetals: Optical and Transport Properties |

427 | Ballistic feature in disordered Dirac and Weyl semimetals | Kobayashi, Koji; Wada, Miku; Ohtsuki, Tomi | We study the dynamics of Dirac and Weyl electrons in disordered Dirac and Weyl semimetals. | Session 30: Dirac and Weyl Semimetals: Optical and Transport Properties |

428 | Circular photogalvanic effect in interacting Weyl semimetals | Avdoshkin, Aleksandr; Kozii, Vladyslav; Moore, Joel | We find that the inclusion of interactions generically breaks the quantization yet the corrections are non-divergent. | Session 30: Dirac and Weyl Semimetals: Optical and Transport Properties |

429 | Anomalous transfer of chirality from light to fermions in Dirac and Weyl semimetals | Philip, Evan; Kaushik, Sahal; Kharzeev, Dmitri | When circularly polarized light interacts with Dirac and Weyl semimetals, we predict that chirality will be transferred from the electromagnetic field to the chiral quasiparticles in the semimetal. | Session 30: Dirac and Weyl Semimetals: Optical and Transport Properties |

430 | Intrinsically Damped Optical Absorption in Dirac Metals | Goyal, Adamya; Kumar, Abhishek; Maslov, Dmitrii | Intrinsically Damped Optical Absorption in Dirac Metals | Session 30: Dirac and Weyl Semimetals: Optical and Transport Properties |

431 | Longitudinal magnetoconductance and the planar Hall effect in a lattice model of tilted Weyl fermions | Ahmad, Azaz; Sharma, Girish | We examine longitudinal magnetoconductivity and the planar Hall effect semi-analytically for a lattice model of tilted Weyl fermions within the Boltzmann approximation. | Session 30: Dirac and Weyl Semimetals: Optical and Transport Properties |

432 | Controlling symmetry and topology via bicircular light: application to Cd3As2 | Victa Trevisan, Thais; Villar Arribi, Pablo; Heinonen, Olle; Slager, Robert-Jan; Orth, Peter | We apply bicircular light tuning to the Dirac semimetal Cd 3As 2 and demonstrate that the material can be driven into different Weyl semimetal phases, with interesting consequences on the protected surface states. | Session 30: Dirac and Weyl Semimetals: Optical and Transport Properties |

433 | Non-local optical plasmon supported by Fermi arc states in thin film Weyl semimetal | Giri, Debasmita; Mukherjee, Dibya Kanti; Verma, Sonu; Fertig, Herb; Kundu, Arijit | We study collective charge oscillations for this system, uncovering a single optical plasmonic mode originating from collective oscillations on the two surfaces. | Session 30: Dirac and Weyl Semimetals: Optical and Transport Properties |

434 | Chiral-Anomaly-Induced Nonlinear Hall Effect in Tilted Weyl Semimetals | Li, Ruihao; Zhang, Shulei; Heinonen, Olle; Burkov, Anton | In this work, we find that the chiral-anomaly-induced nonlinear Hall (CNH) effect requires inversion symmetry breaking as well as asymmetric Fermi surfaces, which may be realized in tilted WSMs wherein the overall tilting of the Weyl cones is asymmetric about the Γ point. | Session 30: Dirac and Weyl Semimetals: Optical and Transport Properties |

435 | Quantized Hall conductance in 3D topological nodal-line semimetals without chiral symmetry | Zhao, Guang-Qi; Rui, W. B.; Wang, Chunming; Lu, Haizhou; Xie, X. C. | We propose an experimental setup to distinguish the surface and bulk quantum Hall effects. | Session 30: Dirac and Weyl Semimetals: Optical and Transport Properties |

436 | Optical conductivity of Dirac Fermi liquid | Sharma, Prachi; Maslov, Dmitrii | We study the effect of electron-electron ( ee) interactions on the optical conductivity of a DFL. | Session 30: Dirac and Weyl Semimetals: Optical and Transport Properties |

437 | Pseudo field effects in type II Weyl semimetals: new probes for over tilted cones | Sabsovich, Daniel; Meng, Tobias; Pikulin, Dmitry; Queiroz, Raquel; Ilan, Roni | We propose a probe for type II Weyl semimetals which determines the direction of the tilt. | Session 30: Dirac and Weyl Semimetals: Optical and Transport Properties |

438 | On the topological character of three-dimensional Nexus triple point degeneracies | Pujari, Sumiran; Das, Ankur | We use this to write down a homological classification of various Nexus triple point degeneracies in three dimensions. | Session 31: Dirac and Weyl Semimetals: Theory |

439 | Geometric properties of band crossing points in two dimensions | Hwang, Yoonseok; Jung, Jun-Seo; Rhim, Jun-Won; Yang, Bohm-Jung | In this work, we study the geometric properties of BCPs in 2D. | Session 31: Dirac and Weyl Semimetals: Theory |

440 | Embedded Topological Semimetals | Velury, Saavanth; Hughes, Taylor | We consider layered (topologically trivial) insulating systems in D dimensions that are composed of coupled multi-layers of d-dimensional topological semimetals. | Session 31: Dirac and Weyl Semimetals: Theory |

441 | From triple points to multi-band nodal links with monopole charges | Lenggenhager, Patrick; Liu, Xiaoxiong; Tsirkin, Stepan; Neupert, Titus; Bzdusek, Tomas | We use non-Abelian topology to derive a relation between seemingly unrelated band node configurations. | Session 31: Dirac and Weyl Semimetals: Theory |

442 | Edge-induced magnetism of Dirac nodal line system in the single-component molecular conductor [Pt(dmdt)2] | Kawamura, Taiki; Zhou, Biao; Kobayashi, Akiko; Kobayashi, Akito | We made the tight-binding model of [Pt(dmdt) 2] based on the first-principles calculation to investigate the electrical properties. | Session 31: Dirac and Weyl Semimetals: Theory |

443 | Diabolical touching point in the magnetic energy levels of topological nodal-line metals | Wang, Chong; Zhang, Zhongyi; Fang, Chen; Alexandradinata, Aris | Diabolical touching point in the magnetic energy levels of topological nodal-line metals | Session 31: Dirac and Weyl Semimetals: Theory |

444 | Triply degenerate point in three-dimensional spinless systems | Feng, Xiaolong; Wu, Weikang; Yu, Zhiming; Yang, Shengyuan | Here, we perform an exhaustive search of triply degenerate points (TDPs) in 230 nonmagnetic space groups in the absence of SOC. | Session 31: Dirac and Weyl Semimetals: Theory |

445 | Quantum anomalies in interacting topological semimetals | Yang, Lei; Wang, Chong; Burkov, Anton | In this talk we explore the following question: can strong electron-electron interactions open a gap in topological semimetals while mantaining their topological response without breaking the protecting symmetries, or introducing topological order? | Session 31: Dirac and Weyl Semimetals: Theory |

446 | Tunable chiral symmetry breaking in symmetric Weyl materials | Kaushik, Sahal; Philip, Evan; Cano, Jennifer | In this work, we derive the conditions required for breaking chiral symmetry by applying an external field in symmetric Weyl semimetals. | Session 31: Dirac and Weyl Semimetals: Theory |

447 | Antiferromagnetism and spin density waves in three-dimensional Dirac metals | Bednik, Grigory | We study possible magnetic instabilities in Dirac semimetals. | Session 31: Dirac and Weyl Semimetals: Theory |

448 | Bulk topology of stable three-dimensional Dirac semimetals | Tyner, Alexander; Sur, Shouvik; Puggioni, Danilo; Rondinelli, James; Goswami, Pallab | In this work, we solve this problem by performing second homotopy classification of Berry’s connections, and determine the topological universality classes of stable Dirac semimetals. | Session 31: Dirac and Weyl Semimetals: Theory |

449 | Higher-Order Weyl Semimetals | Ghorashi, Sayed Ali Akbar; Li, Tianhe; Hughes, Taylor | As a proof of concept we use a model of stacked higher-order quadrupole insulators (QI) to identify three types of WSM phases: $1st$-order, $2nd$-order, and hybrid-order. | Session 31: Dirac and Weyl Semimetals: Theory |

450 | Gapless Criterion for Crystals from Effective Axion Field | Yu, Jiabin; Song, Zhida; Liu, Chaoxing | In this work, we propose a sufficient gapless criterion for three-dimensional noninteracting crystals, based on the simplified expressions for the bulk average value of the static axion field. | Session 31: Dirac and Weyl Semimetals: Theory |

451 | The Infinite Berry Curvature of Weyl Fermi Arcs | Wawrzik, Dennis; You, Jhih-Shih; Facio, Jorge; Van den Brink, Jeroen; Sodemann, Inti | We show that Weyl Fermi arcs are generically accompanied by a divergence of the surface Berry curvature scaling as 1/ k 2, where k is the distance to a hot-line in the surface Brillouin zone that connects the projection of Weyl nodes with opposite chirality but which is distinct from the Fermi arc itself. | Session 31: Dirac and Weyl Semimetals: Theory |

452 | Phonon induced Dirac and Weyl phases in topological insulator ZrTe5 | Aryal, Niraj; Jin, Xilian; Tsvelik, Alexei; Li, Qiang; Yin, Weiguo | We study topological phase transitions induced by optical phonon-mode lattice distortions in ZrTe 5, a layered van der Waals topological insulating material, by using first-principles and effective Hamiltonian methods. | Session 31: Dirac and Weyl Semimetals: Theory |

453 | Randomness Models of Dilute Impurities Determine the Fate of Quantum-Criticality in 3D Dirac Semimetals | Santos Pires, João; Amorim, Bruno; Ferreira, Aires; Adagideli, Inanc; Mucciolo, Eduardo; Viana Parente Lopes, João | Combining analytical methods and high-resolution large-scale simulations [2], we show that scalar impurities can indeed endow a finite NDoS to a 3D semimetal, at infinitesimal concentrations. | Session 32: Dirac and Weyl semimetals: Theory |

454 | Fluctuation of Chern Numbers in Parametric Random Matrix Models | Lin, Hung-Hwa; Kuo, Wei-Ting; Arovas, Daniel; You, Yizhuang | We propose a model to explain the correlations among the degeneracy points. | Session 32: Dirac and Weyl semimetals: Theory |

455 | Spin density wave order in interacting type-I and type-II Weyl semimetals | Kundu, Sarbajaya; Senechal, David | In this talk, I will discuss the results of our analysis, which reveals a continuous transition from the Weyl semimetal phase to a gapped spin density wave (SDW) ordered phase at a critical value of the interaction, determined by the band structure parameters. | Session 32: Dirac and Weyl semimetals: Theory |

456 | Quantum materials for dark matter detection | Geilhufe, Richard | To overcome impurity effects [2], we propose a novel discriminator for a dark matter detection signal against thermal noise based on a directional dependence of the dark matter signal due anisotropy [3]. | Session 32: Dirac and Weyl semimetals: Theory |

457 | Disorder driven multifractality transition in Weyl nodal loops | Araujo, Miguel; Gonçalves, Miguel; Ribeiro, Pedro; Castro, Eduardo | Disorder driven multifractality transition in Weyl nodal loops | Session 32: Dirac and Weyl semimetals: Theory |

458 | Optical Absorption in Weyl Superconductors: Novel Surface-Bulk Response With and Without Disorder | Wu, Tsz Chun; Pal, Hridis; Foster, Matthew | We study the optical absorbance in a p+ip Weyl superconductor (WSC) by investigating the interplay between bulk and surface states responses. | Session 32: Dirac and Weyl semimetals: Theory |

459 | Axionic band topology in inversion-symmetric Weyl-charge-density waves | Bradlyn, Barry; Wieder, Benjamin; Lin, Kuan-Sen | In this talk, we use analytic and numerical methods to study both lattice-commensurate and incommensurate minimal (magnetic) Weyl-CDW systems. | Session 32: Dirac and Weyl semimetals: Theory |

460 | Optical Response from Charge-Density Waves in Weyl Semimetals | McKay, Robert; Bradlyn, Barry | We compare the collective mode contributions from the longitudinal conductivity in a WSM to the established 1D results at linear and nonlinear order. | Session 32: Dirac and Weyl semimetals: Theory |

461 | Criticality of two-dimensional disordered Dirac fermions in the unitary class | Sbierski, Bjoern; Dresselhaus, Elizabeth; Moore, Joel; Gruzberg, Ilya | We find a critical line at m=0, with energy dependent localization length exponent. | Session 32: Dirac and Weyl semimetals: Theory |

462 | Weak Antilocalization and Quantum Hall Effect in Bulk CaCuSb Single Crystal | SASMAL, SOUVIK; Mondal, Rajib; Kulkarni, Ruta; Tripathi, Vikram; Singh, Bahadur; Thamizhavel, Arumugam | Here, we report on the observation of weak antilocalization (WAL) and QHE followed by Shubnikov de-Haas (SdH) oscillations with oscillation frequency 314 T in bulk CaCuSb single crystal which crystallizes in the hexagonal structure (P6 3/mmc). | Session 32: Dirac and Weyl semimetals: Theory |

463 | Competing orders at the interface of a bilayer Weyl system with Fermi arcs | Kundu, Ritajit; Mukherjee, Rohit; Fertig, Herb; Kundu, Arijit | We study interaction effects at the interface of two Weyl semimetals, each with multiple Fermi arc states on their surfaces. | Session 32: Dirac and Weyl semimetals: Theory |

464 | Strain-Induced Landau Levels in Tilted Weyl Semimetals | Lee, Yangjun; Park, Cheol-Hwan | In this talk, we expand these theories to tilted Weyl cone systems and present the results of our calculations on strained and tilted Weyl semimetals. | Session 32: Dirac and Weyl semimetals: Theory |

465 | Quasi one-dimensional Ta2Se8I under pressure: From Weyl semimetal to superconductor | Nenno, Dennis; Mu, Qingge; Curtis, Jonathan; Gooth, Johannes; Felser, Claudia; Medvediev, Sergey; Narang, Prineha | Here, we present a study on the electronic properties of Ta 2Se 8I under pressure. | Session 32: Dirac and Weyl semimetals: Theory |

466 | Quantum oscillation beyond the quantum limit in pseudospin Dirac materials | Wang, Chunming; Lu, Haizhou; Xie, X. C. | We propose a mechanism of quantum oscillation beyond the strong-field quantum limit for Dirac fermions. | Session 32: Dirac and Weyl semimetals: Theory |

467 | Heterogeneous Magnetic Domains in a Noncentrosymmetric Ferromagnetic Weyl Semimetal | Xu, Bochao; Franklin, Jacob; Yang, Hung-Yu; Tafti, Fazel; Sochnikov, Ilya | Here, we use a scanning SQUID microscope to image spontaneous magnetization and magnetic susceptibility of CeAlSi, a noncentrosymmetric ferromagnetic Weyl semimetal candidate. | Session 32: Dirac and Weyl semimetals: Theory |

468 | 2021 Valley Prize Talk | Khemani, Vedika | 2021 Valley Prize Talk | Session 33: Disorder and Localization in AMO Systems |

469 | Characterizing the many-body localization transition through correlations | Villalonga, Benjamin; Clark, Bryan | In this work we study the distribution of correlations throughout the ergodic-MBL phase diagram. | Session 33: Disorder and Localization in AMO Systems |

470 | Absence of True Localization in Many-Body Localized Phases | Kiefer-Emmanouilidis, Maximilian; Unanyan, Razmik; Fleischhauer, Michael; Sirker, Jesko | Calculating the Rényi number entropy SNα(t) for α«1—which is sensitive to large number fluctuations occurring with low probability—we demonstrate that p(n) in one half of the system has a small but continuously growing tail. | Session 33: Disorder and Localization in AMO Systems |

471 | Construction of Flat band Quantum Scars | Kuno, Yoshihito; Mizoguchi, Tomonari; Hatsugai, Yasuhiro | We propose a general construction scheme for a quantum scar state in flat band systems. | Session 33: Disorder and Localization in AMO Systems |

472 | Dynamics in centrally coupled spin systems | Wenderoth, Sebastian; Ng, Nathan; Kolodrubetz, Michael; Rabani, Eran; Thoss, Michael | We employ the multilayer multiconfiguration time-dependent Hartree approach [2,3] to simulate the dynamics of moderately large spin chains in a numerically exact way. | Session 33: Disorder and Localization in AMO Systems |

473 | Entanglement Transitions in 2D Random Tensor Networks | Levy, Ryan; Clark, Bryan | We numerically study the entanglement phase transition in two-dimensional random tensor networks (Vasseur et al[Phys. | Session 33: Disorder and Localization in AMO Systems |

474 | Evading Anderson Localization in a one-dimensional conductor with correlated disorder | Narayan, Onuttom; Mathur, Harsh; Montgomery, Richard | We show that a one-dimensional disordered conductor with correlated disorder has an extended state and a Landauer resistance that is non-zero in the limit of infinite size in contrast to the predictions of the scaling theory of localization. | Session 33: Disorder and Localization in AMO Systems |

475 | Evidence for Quantum Chaos in a One-Dimensional Classically Integrable System | Elkamshishy, Ahmed; Greene, Chris | Using a dimensionless parameter that reflects the degree of state localization, we demonstrate how the transition from regularity to chaos is affected by state localization. | Session 33: Disorder and Localization in AMO Systems |

476 | Fluctuation-dissipation relations as an experimentally accessible indicator for thermalization of disordered quantum spin systems | Braemer, Adrian; Gaerttner, Martin | In this talk, we present numerical results on the validity FDRs in disordered quantum spin systems and discuss experimental protocols for measuring them. | Session 33: Disorder and Localization in AMO Systems |

477 | Many-body delocalization via symmetry emergence. | N S, Srivatsa; Moessner, Roderich; Nielsen, Anne | Specifically, we propose a Z 2 symmetric model with nonlocal interactions, which has an analytically known, SU(2) invariant, critical ground state. | Session 33: Disorder and Localization in AMO Systems |

478 | Many-body flatband localization | Danieli, Carlo; Andreanov, Alexei; Flach, Sergej | We propose a generator of corresponding Hamiltonians which covers both interacting bosons and fermions for arbitrary lattice dimensions, and we provide explicit examples of such models in one and two lattice dimensions. | Session 33: Disorder and Localization in AMO Systems |

479 | Speck of Chaos | Santos, Lea; Pérez-Bernal, Francisco; Torres Herrera, E. Jonathan | We focus on two indicators of chaos, the correlation hole, which is a dynamical tool, and the distribution of off-diagonal elements of local observables, which is used in the eigenstate thermalization hypothesis. | Session 33: Disorder and Localization in AMO Systems |

480 | Dynamics on multiple timescales in centrally coupled disordered spin systems | Ng, Nathan; Wenderoth, Sebastian; Rabani, Eran; Thoss, Michael; Kolodrubetz, Michael | Here, we consider a 1D disordered Ising chain globally coupled to d-level qudit, which has connections to systems under monochromatic external drive and display Floquet MBL. | Session 33: Disorder and Localization in AMO Systems |

481 | Disordered fermions in optical lattices | DeMarco, Brian | Disordered fermions in optical lattices | Session 33: Disorder and Localization in AMO Systems |

482 | Super Hamiltonian method for two-dimensional quasicrystals | Duncan, Callum; Valiente, Manuel | In this work, we extend this approach to 2D and consider an example of an 8-fold symmetric potential. | Session 33: Disorder and Localization in AMO Systems |

483 | Postselection-free entanglement dynamics via spacetime duality | Ippoliti, Matteo; Khemani, Vedika | We propose a method to sidestep this issue in a wide class of non-unitary circuits by taking advantage of spacetime duality. | Session 33: Disorder and Localization in AMO Systems |

484 | Perturbative instability of non-ergodic phases in non-Abelian quantum chains | Ware, Brayden; Abanin, Dmitry; Vasseur, Romain | In such chains, real space renormalization group methods predict a partially localized, non-ergodic regime known as a quantum critical glass (a critical variant of MBL). | Session 33: Disorder and Localization in AMO Systems |

485 | Persistence of correlations in many-body localized spin chains | Vadimov, Vasilii; Ala-Nissila, Tapio; Möttönen, Mikko | We study the evolution and persistence of quantum and classical correlations between spatially separated sites in the disordered XXZ spin chain in its ergodic and many-body-localized phases using exact diagonalization and matrix product state simulations. | Session 33: Disorder and Localization in AMO Systems |

486 | Many Body Localization Transition in Quasiperiodic Systems | Singh, Hansveer; Ware, Brayden; Gopalakrishnan, Sarang; Vasseur, Romain | We study the many body localization transition in an XXZ spin chain subject to a quasiperiodic field by examining the structure of the local conserved quantities (l-bits) in the phase diagram. | Session 33: Disorder and Localization in AMO Systems |

487 | Many-body localization of quantized plasmonic excitations in disordered 1-D atomic chains | Townsend, Emily; Gaunin, Mark-yves; Bryant, Garnett | We show how the MBL develops with disorder and how it influences the time evolution of plasmonic excitations launched on disordered chains. | Session 33: Disorder and Localization in AMO Systems |

488 | Cavity induced Many-body localization | Ge, Rongchun; Kolodrubetz, Michael | In this talk, we investigate the possibility of achieving MBL in the context of cavity quantum electrodynamics, where localization is made difficult due to long-range interactions with the cavity mode. | Session 33: Disorder and Localization in AMO Systems |

489 | Static and dynamical properties of a one-dimensional model with long-range couplings | Vallejo, Isaías; Luna-Acosta, Germán; Torres Herrera, E. Jonathan | We will present our studies about the one-dimensional Anderson model with long range couplings. | Session 33: Disorder and Localization in AMO Systems |

490 | Multifractality and self-averaging at the many-body localization transition | Solórzano, Andrei; Torres Herrera, E. Jonathan; Santos, Lea | We study the one-dimensional (1D) Heisenberg spin-1/2 model with onsite disorder at the transition to the many-body localized phase and show that the states satisfy an analytical expression obtained for the multifractal dimensions of the eigenstates of the 1D Fibonacci lattice. | Session 33: Disorder and Localization in AMO Systems |

491 | Numerical evidence for a many-body localization transition in two dimensions | Swain, Nyayabanta; Tang, Ho-Kin; Khor, Brian; Assaad, Fakher; Adam, Shaffique; Sengupta, Pinaki | Our study presents concrete numerical evidence for the existence of a many-body localized phase in two dimensions. | Session 33: Disorder and Localization in AMO Systems |

492 | Many-body localization in a disordered quantum dimer model on the honeycomb lattice | Pietracaprina, Francesca; Alet, Fabien | We numerically study the possibility of many-body localization transition in a disordered quantum dimer model on the honeycomb lattice. | Session 33: Disorder and Localization in AMO Systems |

493 | Complex network description of phase transitions in the classical and quantum disordered Ising Model | Fasihi, Mina; Garcia Perez, Guillermo; Maniscalco, Sabrina; Carr, Lincoln | In this study, the spin-spin correlations at different temperatures are analytically calculated, yielding phase-dependent complex networks, from simple networks in the low temperature ferromagnetic limit to random ones at high temperature. | Session 33: Disorder and Localization in AMO Systems |

494 | Missing Shapiro steps in topologically trivial Josephson Junction on InAs quantum well | Shabani, Javad | We report on missing odd steps in topologically trivial Josephson junctions fabricated on InAs quantum wells. | Session 34: Distinguishing Trivial and Topological Superconducting States in Hybrid Devices |

495 | Flux-tunable Andreev bound states in hybrid full-shell nanowires | Valentini, Marco; Peñaranda, Fernando; Hofmann, Andrea; Brauns, Matthias; Hauschild, Robert; Krogstrup, Peter; San-Jose, Pablo; Prada, Elsa; Aguado, Ramon; Katsaros, Georgios | Here we show that the magnetic flux tunability of full-shell nanowires allows to clearly identify subgap levels as Andreev bound states. | Session 34: Distinguishing Trivial and Topological Superconducting States in Hybrid Devices |

496 | Non-Majorana states yield nearly-quantized conductance in proximatized nanowires | Yu, Peng | We also lay out procedures for assessing the nonlocality of subgap wave functions and provide a classification of nanowire bound states based on their localization. | Session 34: Distinguishing Trivial and Topological Superconducting States in Hybrid Devices |

497 | From Andreev to Majorana bound states in hybrid superconductor-semiconductor nanowires | Prada, Elsa; San-Jose, Pablo; De Moor, Michiel; Geresdi, Attila; Lee, Eduardo; Klinovaja, Jelena; Loss, Daniel; Nygard, Jesper; Aguado, Ramon; Kouwenhoven, Leo | We discuss how the combined effect of spin-orbit coupling and Zeeman field in these wires triggers the transition from ABSs into MBSs. | Session 34: Distinguishing Trivial and Topological Superconducting States in Hybrid Devices |

498 | Absence of Evidence for Chiral Majorana Modes in Quantum Anomalous Hall-Superconductor Devices | Chang, Cui-Zu | In this talk, I will introduce our recent progress in this direction. | Session 34: Distinguishing Trivial and Topological Superconducting States in Hybrid Devices |

499 | Ultrafast dynamics in MnPS3 studied by time-resolved optical spectroscopy | Shan, Jun-Yi; Ye, Mengxing; Chu, Hao; Lee, Sungmin; Park, Je-Geun; Balents, Leon; Hsieh, David | In this talk, I will report time-resolved SHG and linear reflectivity measurements on MnPS 3, demonstrating ultrafast modulation of its electronic properties via both thermal and non-thermal mechanisms. | Session 35: Dynamics of Quenched and Driven Quantum Systems |

500 | Second order Josephson effect in excitonic insulators | Sun, Zhiyuan; Kaneko, Tatsuya; Golez, Denis; Millis, Andrew | We show that in electron-hole bilayers with conduction and valence bands formed by atomic orbitals with different parities, nonzero interlayer tunneling leads to a second order Josephson effect in the excitonic insulating state, where the interlayer electrical current is related to the phase of the excitonic order parameter as J = J c sin(2θ) instead of J = J c sin(θ). | Session 35: Dynamics of Quenched and Driven Quantum Systems |

501 | Field-Driven Correlated Quantum Systems, Bridging the Gap Between the Transient and the Steady State | Dohner, Eric; Fotso, Herbert; Kemper, Alexander; Freericks, James | We demonstrate an extrapolation scheme that can be leveraged to extend the characterization of the system from equilibrium to steady state at minimal computational cost. | Session 35: Dynamics of Quenched and Driven Quantum Systems |

502 | Measurement Protected Quantum Phases | Sang, Shengqi; Hsieh, Timothy | We introduce a class of hybrid quantum circuits, with random unitaries and projective measurements, which host long-range order in the area law entanglement phase of the steady state. | Session 35: Dynamics of Quenched and Driven Quantum Systems |

503 | Systematic large flavor fTWA approach to interaction quenches | Osterkorn, Alexander; Kehrein, Stefan | In this talk, we adopt the method and combine it with the limit of high fermion degeneracy N as a well-defined semiclassical expansion parameter. | Session 35: Dynamics of Quenched and Driven Quantum Systems |

504 | Matrix product state simulations with general non-Abelian symmetries | Werner, Miklós Antal; Moca, Catalin Pascu; Legeza, Örs; Zaránd, Gergely | We introduce the notion of non-Abelian tensors, and use them to build a general non-Abelian matrix product state (NA-MPS) ansatz. | Session 35: Dynamics of Quenched and Driven Quantum Systems |

505 | Femtosecond thermalization of electrons and holes in transition-metal ferromagnets | Turkowski, Volodymyr; Ud, Naseem; Chang, Hung-Tzu; Leone, Stephen; Rahman, Talat | We analyze ultrafast charge dynamics in transition metal ferromagnets Fe, Co and Ni by using dynamical mean-field theory and time-dependent density-functional theory (DMFT+TDDFT) . | Session 35: Dynamics of Quenched and Driven Quantum Systems |

506 | Quantum Wakes in Lattice Fermions | Wampler, Matthew; Schauss, Peter; Kolomeisky, Eugene; Klich, Israel | Here, we investigate the effect of moving disturbances on a Fermi lattice gas of ultracold atoms and analyze the novel types of wake patterns that may occur. | Session 35: Dynamics of Quenched and Driven Quantum Systems |

507 | Quantum Impurity Far from Equilibrium: Quantum Transport Through a Dissipative Resonant Level Using DMRG | Zhang, Xin; Barthel, Thomas; Baranger, Harold | Using time-dependent matrix product state techniques, we study the quantum transport properties of a dissipative resonant level model, in which a quantum impurity is coupled to two leads and a bosonic bath. | Session 35: Dynamics of Quenched and Driven Quantum Systems |

508 | Quench dynamics of optically pumped electron-phonon systems | Sous, John; Kloss, Benedikt; Kennes, Dante; Reichman, David; Millis, Andrew | Motivated by recent experimental reports of novel phases in materials driven by intense radiation fields, we use numerically exact matrix product and exact diagonalization algorithms to simulate the dynamics of a metal driven at t = 0 by a pump that excites dipole-active vibrational modes that are either linearly or quadratically coupled to electrons. | Session 35: Dynamics of Quenched and Driven Quantum Systems |

509 | Logarithmic entanglement growth from disorder-free localisation in the two-leg compass ladder | Hart, Oliver; Gopalakrishnan, Sarang; Castelnovo, Claudio | We map these systems onto a model of free fermions coupled to strictly localized spin-1/2 degrees of freedom. | Session 35: Dynamics of Quenched and Driven Quantum Systems |

510 | Quantum Quenches in Coupled Luttinger Liquids: Truncated Spectrum Approach vs Semi-Classics | Konik, Robert; James, Andrew J. A.; Hallam, Andrew | We argue that this difference is real through unitary perturbation theory which is exact at short times. | Session 35: Dynamics of Quenched and Driven Quantum Systems |

511 | Hole burning as a probe of localization. | Ravindranath, Vikram; Gopalakrishnan, Sarang; Oganesyan, Vadim | We have attempted to explore its implications, especially in transport quantities such as the AC conductivity. | Session 35: Dynamics of Quenched and Driven Quantum Systems |

512 | Matrix product state investigations of time-dependent spectral functions after a photoexcitation | Meyer, Constantin; Manmana, Salvatore | We study the time-dependent single-particle spectral function A(k,ω,t) after a photoexcitation of a variant of the 1d Hubbard model with a background staggered magnetic field using matrix product state (MPS) techniques. | Session 35: Dynamics of Quenched and Driven Quantum Systems |

513 | DC photocurrent in a ferroelectric excitonic insulator | Kaneko, Tatsuya; Sun, Zhiyuan; Murakami, Yuta; Golez, Denis; Millis, Andrew | We theoretically investigate the linear and nonlinear optical responses in a non-centrosymmetric excitonic insulator (EI). | Session 35: Dynamics of Quenched and Driven Quantum Systems |

514 | Nonequilibrium phase transition in transport through a driven quantum point contact | Gamayun, Oleksandr; Slobodeniuk, Artur; Caux, Jean-Sebastian; Lychkovskiy, Oleg | We study transport of noninteracting fermions through a periodically driven quantum point contact (QPC) connecting two tight-binding chains. | Session 35: Dynamics of Quenched and Driven Quantum Systems |

515 | Spatio-temporal Dynamics of Non-equilibrium Phase Separation in Resistive Switching | Mozumdar, Kunal; Mansaray, Ishiaka; Han, Jong E | Our objective is to characterize the dynamics of the system in its coexistence phase by studying the fluctuations near the critical point. | Session 35: Dynamics of Quenched and Driven Quantum Systems |

516 | Fast Nonequilibrium Green Functions simulations with GW selfenergies | Makait, Christopher; Schlünzen, Niclas; Joost, Jan-Philip; Bonitz, Michael | Here, we present first relaxation results in 1 and 2 dimensions. | Session 35: Dynamics of Quenched and Driven Quantum Systems |

517 | Quantum supremacy and quantum phase transitions | Thanasilp, Supanut; Tangpanitanon, Jirawat; Lemonde, Marc-Antoine; Dangniam, Ninnat; Angelakis, Dimitris | In this work, we describe how the experiment proposed in Ref. | Session 35: Dynamics of Quenched and Driven Quantum Systems |

518 | Random multipolar driving: tunably slow heating through spectral engineering | Zhao, Hongzheng; Mintert, Florian; Moessner, Roderich; Knolle, Johannes | We study heating in interacting quantum many-body systems driven by random sequences with n−multipolar correlations, corresponding to a polynomially suppressed low frequency spectrum. | Session 35: Dynamics of Quenched and Driven Quantum Systems |

519 | Untangling time scales in entanglement growth in the disordered Fermi Hubbard model | Wortis, Rachel; Leipner-Johns, Brandon | To explore the spread of information between these in the presence of disorder, we compare the time dependence of the entanglement entropy with the time dependence of the charge and spin correlations, and in addition we rewrite the Hamiltonian in terms of charge and spin-specific integrals of motion, allowing us to distinguish time scales associated with charge-charge, spin-spin, and charge-spin correlations. | Session 35: Dynamics of Quenched and Driven Quantum Systems |

520 | Signatures of ultrafast reversal of excitonic order in Ta2NiSe5 | Ning, Honglie; Mehio, Omar; Buchhold, Michael; Kurumaji, Takashi; Refael, Gil; Checkelsky, Joseph; Hsieh, David | Starting from a microscopic Hamiltonian, we derive the equations of motion for the electronic and structural order parameters in the excitonic insulator Ta 2NiSe 5. | Session 35: Dynamics of Quenched and Driven Quantum Systems |

521 | Engineering effective adiabatic evolution via suitable coupling to auxiliary systems | Hipolito, Rafael; Goldbart, Paul | By using geometrical arguments, we explore alternative means to engineer adiabatic evolution via increasing the number of freedoms, and thus induce adiabatic evolution by using entirely local terms. | Session 35: Dynamics of Quenched and Driven Quantum Systems |

522 | Decoherent quantum critical quench dynamics in topological phases | Kuo, Wei-Ting; You, Yizhuang; Arovas, Daniel; Vishveshwara, Smitha | We consider the problem of a quench across a quantum phase transition in open quantum systems, and the consequences of its associated non-equilibrium dynamics. | Session 35: Dynamics of Quenched and Driven Quantum Systems |

523 | Fragmentation and glassy dynamics in frustrated spin models with kinematic constraints | Lee, Kyungmin; Pal, Arijeet; Changlani, Hitesh | Focusing on kagome lattice, we explicitly show the fragmentation in the Balents-Fisher-Girvin Hamiltonian and a three-coloring model with loop excitations, both with constrained Hilbert spaces. | Session 35: Dynamics of Quenched and Driven Quantum Systems |

524 | Engineering Magnetic Phases Out of Equilibrium in a Strongly Spin-Orbit Coupled Honeycomb Magnet | Sriram, Adithya; Claassen, Martin | Engineering Magnetic Phases Out of Equilibrium in a Strongly Spin-Orbit Coupled Honeycomb Magnet | Session 35: Dynamics of Quenched and Driven Quantum Systems |

525 | Non-Gaussian work statistics in fermionic nanostructures | Grabarits, András; Kormos, Marton; Lovas, Izabella; Zarand, Gergely | We construct a simple mean field theory yielding amazingly precise analytic expressions for the distribution of work in the case of zero temperature for arbitrarily fast driven quantum systems. | Session 35: Dynamics of Quenched and Driven Quantum Systems |

526 | Interface Pinning and an Entanglement Transition in Weakly-Monitored Quantum Dynamics | Vijay, Sagar; Li, Yaodong; Fisher, Matthew P | Here we show that transitions between this phase, and a phase in which the steady-state resembles a more conventional, volume-law entangled (Page) state can arise in local, weakly-monitored dynamics. | Session 35: Dynamics of Quenched and Driven Quantum Systems |

527 | Numerical study on quantum transport with strongly interacting fermions | Zou, Jie; Li, Xiaopeng | Here, we study one-dimensional spinless fermions at strong interaction limit, and develop an efficient algorithm to simulate the interacting quantum dynamics in this system, by which hundreds to thousands of atoms can be simulated. | Session 35: Dynamics of Quenched and Driven Quantum Systems |

528 | Dynamical Transition for a class of integrable models coupled to a bath | SARKAR, MADHUMITA | We study the dynamics of correlation functions of a class of d−dimensional integrable models coupled linearly to a fermionic or bosonic bath in the presence of a periodic drive. | Session 35: Dynamics of Quenched and Driven Quantum Systems |

529 | Fizeau Drag in Graphene Plasmonics | Dong, Yinan; Xiong, Lin; Phinney, Isabelle; Sun, Zhiyuan; Jing, Ran; McLeod, Alexander; Zhang, Shuai; Liu, Song; Gao, Haoyang; Dong, Zhiyu; Pan, Richard; Edgar, James; Jarillo-Herrero, Pablo; Levitov, Leonid; Millis, Andrew; Fogler, Michael; Bandurin, Denis; Basov, Dmitri | Here we report on the electron flow dragging surface plasmon polaritons (SPPs): hybrid quasiparticles of infrared photons and electrons in graphene. | Session 36: Electronic Properties of Surfaces, Interfaces and Thin Films |

530 | Superlattice-induced Minigap in Graphene Band structure Due to Underlying Periodicity | Narayanan Nair, Maya; Celis, Arlensiu; Sicot, Muriel; Nicolas, Francois; Kubsky, Stefan; Taleb Ibrahimi, Amina; Malterre, Daniel; Tejeda, Antonio | In this talk, I will present, the successful preparation of graphene on periodically nanostructed substrates Ir(332) and Pt(111) and associated band gap openings in its electronic structure[5,6]. | Session 36: Electronic Properties of Surfaces, Interfaces and Thin Films |

531 | Electronic and magnetic properties of Gr/Fe/Ir(111) heterostructure | Cardoso, Claudia; Avvisati, Giulia; Gargiani, Pierluigi; Sbroscia, Marco; Jagadeesh, Madan S.; Mariani, Carlo; Leon Valido, Dario; Varsano, Daniele; Ferretti, Andrea; Betti, Maria Grazia | We investigate a well-defined heterostructure constituted by magnetic Fe layers intercalated between graphene (Gr) and Ir(111). | Session 36: Electronic Properties of Surfaces, Interfaces and Thin Films |

532 | Quantum Sensing of Insulator-to-Metal Transitions in a Mott Insulator | McLaughlin, Nathan; Kalcheim, Yoav; Suceava, Albert; Wang, Hailong; Du, Chunhui; Schuller, Ivan | We studied the resistive switching properties of pristine and ion-irradiated VO2 thin film devices by performing optically detected diamond Nitrogen Vacancy (NV) electron spin resonance measurements. | Session 36: Electronic Properties of Surfaces, Interfaces and Thin Films |

533 | Electron pocket and (topological) surface states of the Yb(0001) surface | Bihlmayer, Gustav; Sheverdyaeva, Polina; Moras, Paolo; Bluegel, Stefan; Offi, Francesco; Carbone, Carlo | We present a combined experimental and theoretical study of Yb on Mo(110) that shows that Yb grows in hcp stacking and its (0001) surface hosts two surface state where one of them is of topological origin, located in a region between two nodal lines. | Session 36: Electronic Properties of Surfaces, Interfaces and Thin Films |

534 | Atomic and Electronic Properties of Molecular Beam Epitaxy Grown Monoclinic Ag2Se Thin Film | Daneshmandi, Samira; Lyu, Yanfeng; Yuan, Hanming; Adnani Takantapeh, Moein; Chu, Paul C. W. | Our findings provide a convenient method to produce the Ag 2Se thin film and a deeper understanding of the physical properties of this compound. | Session 36: Electronic Properties of Surfaces, Interfaces and Thin Films |

535 | Coherently coupled quantum-well states in bimetallic Pb/Ag thin films | Pan, Chi-Ruei; Lee, Woojoo; Shih, Chih-Kang; Chou, Mei-Yin | The excellent agreement between theory and experiment confirms the physical picture proposed in this work. | Session 36: Electronic Properties of Surfaces, Interfaces and Thin Films |

536 | First-Principles Theory for Schottky Barrier Physics | Skachkov, Dmitry; Zhang, Xiaoguang; Cheng, Hai-Ping | We develop a first-principles theory for Schottky barrier physics. | Session 36: Electronic Properties of Surfaces, Interfaces and Thin Films |

537 | General, Strong Impurity-Strength Dependence of Quasiparticle Interference | Hong, Seung-Ju; Lihm, Jae-Mo; Park, Cheol-Hwan | In this presentation, we show that the quasiparticle interference pattern is strongly dependent on the strength of the impurity even in the simplest case of a single-site impurity on the square lattice with an s orbital per site. | Session 36: Electronic Properties of Surfaces, Interfaces and Thin Films |

538 | Site-specific valence-band of Pt monolayer on SrTiO3 (001) via X-ray standing wave excited photoelectron emission | Chen, Yanna; Jones, Leighton; Das, Anusheela; Lee, Tien Lin; Keane, Denis; Schatz, George; Bedzyk, Michael | In this work, X-ray standing wave (XSW) excited photoemission was used to measure the site-specific valence band for a Pt monolayer (ML) grown on a SrTiO 3 (001) substrate (Pt/STO). | Session 36: Electronic Properties of Surfaces, Interfaces and Thin Films |

539 | Coulomb blockade effects in tunneling measurements of a topological insulator grown on a high-Tc cuprate superconductor | Rachmilowitz, Bryan; Zhao, He; Ren, Zheng; Li, Hong; Thomas, Konrad; Marangola, John; Gao, Shang; Schneeloch, John; Zhong, Ruidan; Gu, Genda; Flindt, Christian; Zeljkovic, Ilija | We use molecular-beam epitaxy to grow thin films of topological insulator Bi 2Te 3 on a high-T c superconductor Bi 2Sr 2CaCu 2O 8+x, and study the surface of Bi 2Te 3 using low-temperature scanning tunneling microscopy and spectroscopy. | Session 36: Electronic Properties of Surfaces, Interfaces and Thin Films |

540 | The interfacial effect on the anomalous Hall effect of magnetic topological insulators | Yi, Hee Taek; Yao, Xiong; Jain, Deepti; Oh, Seongshik | In this presentation, we investigate the interfacial effect, interplay between magnetic topological insulators (MTIs) and capping/buffer layers. | Session 36: Electronic Properties of Surfaces, Interfaces and Thin Films |

541 | Revisiting the electronic structure of ErAs/GaAs(001) interface | Ho, Quoc-Dai; Hu, Ruiqi; Bryant, Garnett; Janotti, Anderson | Revisiting the electronic structure of ErAs/GaAs(001) interface | Session 36: Electronic Properties of Surfaces, Interfaces and Thin Films |

542 | Tight-binding model of rare-earth mono-pnictides | Hu, Ruiqi; Ho, Quoc-Dai; Janotti, Anderson; Bryant, Garnett | In this presentation we will describe a tight-binding parameterization of ErAs and GaAs aiming at describing the electronic structure of ErAs-GaAs containing a large number of atoms that is otherwise prohibitively large for first-principles calculations. | Session 36: Electronic Properties of Surfaces, Interfaces and Thin Films |

543 | Effect of electric field on the electron field emission current densities of Cu and Cu-O systems: A First-Principle Approach | Diaz, Leopoldo; Sanati, Mahdi; Joshi, Ravindra | In this study we investigated the electron field emission current densities for the 100, 110, and 111 surfaces of Cu and Cu with an oxygen adlayer. | Session 36: Electronic Properties of Surfaces, Interfaces and Thin Films |

544 | Inducing anisotropies in Dirac fermions by periodic driving | Diaz Fernandez, Alvaro | In our work, we consider the three-dimensional Hamiltonian for Bi 2Se 3, a second-generation topological insulator, under the effect of a periodic drive for both in-plane and out-of-plane fields. | Session 37: Electronic Structure and Magnetism in Topological Materials |

545 | Unusual change in the electronic structure of a semimetal NdSb across the magnetic transition* | Sakhya, Anup Pradhan; Hosen, M. Mofazzel; Regmi, Sabin; Wang, Baokai; Dhakal, Gyanendra; Dimitri, Klauss; Kabir, Firoza; Sims, Christopher; Persaud, Luis; Bauer, Eric; Ronning, Filip; Bansil, Arun; Neupane, Madhab | Here, we have reported a systematic investigation of the Fermi surface and the band dispersion of a correlated semimetal NdSb in the paramagnetic (PM) phase as well as the antiferromagnetic (AFM) phase (T N ~ 15 K) using angle-resolved photoemission spectroscopy (ARPES). | Session 37: Electronic Structure and Magnetism in Topological Materials |

546 | Classification of radial spin textures in chiral crystals | Gosalbez Martinez, Daniel; Tsirkin, Stepan; Yazyev, Oleg | In this work, we classify the different spin textures allowed by symmetry at the high-symmetry points of the chiral point groups. | Session 37: Electronic Structure and Magnetism in Topological Materials |

547 | A Fermi Arc Ladder Reveals Higher-Fold Topology | Cochran, Tyler; Chang, Guoqing; Belopolski, Ilya; Sanchez, Daniel; Manna, Kaustuv; Cheng, Zijia; Yang, Xian; Multer, Daniel; Yin, Jiaxin; Zhang, Songtian; Shumiya, Nana; Sanchez, Jaime; Le Fèvre, Patrick; bertran, François; Strocov, Vladimir; Muro, Takayuki; Denlinger, Jonathan; Felser, Claudia; Lin, Hsin; Hasan, Zahid | In this work, we leverage a photoemission spectroscopy probe to discover the multi-gap topology of a higher-fold chiral fermion material [1]. | Session 37: Electronic Structure and Magnetism in Topological Materials |

548 | Electronic Structure and Properties of 2M WS2 | Scougale, William; Dulal, Rabindra; Samarawickrama, Piumi; McBride, Joseph; Leonard, Brian; Ackerman, John; Tian, Jifa; Mo, Sung-Kwan; Rotenberg, Eli; Chien, Te-Yu | In this work, we explore the electronic structure of 2M WS 2 using STM and angle resolved photoemission spectroscopy (ARPES). | Session 37: Electronic Structure and Magnetism in Topological Materials |

549 | Giant Photonic Response of Mexican-hat Topological Semiconductors for Mid-infrared to THz Applications | Xu, Haowei; Zhou, Jian; Wang, Hua; Li, Ju | We demonstrate that topological insulators (TIs), especially those with Mexican-hat band structure (MHBS), provide a route to overcome these challenges. | Session 37: Electronic Structure and Magnetism in Topological Materials |

550 | Electron transport in the topological metal Molybdenum Phosphide | Kumar, Sushant; Sundararaman, Ravishankar | In this work, we use first-principles calculations to evaluate the performance and prospect of a topological semi-metal MoP as a future interconnect material. | Session 37: Electronic Structure and Magnetism in Topological Materials |

551 | Symmetry-Enforced Dirac and Nodal-Line States in Nonsymmorphic α-Bismuthene/Antimonene | Lu, Qiangsheng; Chen, Kyle; Snyder, Matthew; Cook, Jacob; Nguyen, Tung; Bian, Guang | Here we will discuss our recent work on the realization of the symmetry-enforced Dirac and nodal-line states in nonsymmorphic α-bismuthene/Antimonene (Bi/Sb monolayer). | Session 37: Electronic Structure and Magnetism in Topological Materials |

552 | Unlocking nonlinear optical phenomena due to spin-orbit and Zeeman interactions in the graphene family topological insulators | Malla, Rajesh; Saxena, Avadh; De Melo Kort-Kamp, Wilton | In this work, we show that although a Rashba spin-orbit coupling and an in-plane Zeeman interaction cannot independently break this in-plane spatial symmetry, together they are able to do so, which leads to a nonlinear optical response that includes the generation of even harmonics. | Session 37: Electronic Structure and Magnetism in Topological Materials |

553 | Topological Phase Transition Induced by Partial Ordering of Heavy Alkali Adatoms in Graphene Monolayer | Nagy, Daniel; Dora, Balazs; Koltai, Janos; Oroszlany, Laszlo | In this presentation I will talk about the topological phases of alkali adatom doped graphene. | Session 37: Electronic Structure and Magnetism in Topological Materials |

554 | Tuning the Surface Spin Textures of Topological Materials | Yin, Yuefeng; Fuhrer, Michael; Medhekar, Nikhil | We have observed a transition from in-plane to out-of-plane spin polarizations on the surface of a topologically nontrivial pyrite-type crystal OsX2 (X=Se, Te). | Session 37: Electronic Structure and Magnetism in Topological Materials |

555 | Tuning the Edge States of Bismuthene via Substrate Effects | Wang, Chutian; Yin, Yuefeng; Fuhrer, Michael; Medhekar, Nikhil | In this work, we study the robustness of edge states in a two-dimensional topological crystalline insulator (2D TCI) and approaches of modifying them based on a planar bismuthene model. | Session 37: Electronic Structure and Magnetism in Topological Materials |

556 | Tight-binding models for two-dimensional allotropes of bismuth-based on localized Wannier functions | Li, Qile; Smith, Jackson; Yin, Yuefeng; Wang, Chutian; Klymenco, Mykhailo; Cole, Jared; Medhekar, Nikhil | We have constructed tight-binding models based on the Wannier basis derived from first principles calculations to investigate the electronic structure of two-dimensional bismuth allotropes. | Session 37: Electronic Structure and Magnetism in Topological Materials |

557 | Observation of sixfold degenerate fermions in a superconducting metal. | Yang, Xian; Cochran, Tyler; Chapai, Ramakanta; Tristant, Damien; Yin, Jiaxin; Belopolski, Ilya; Cheng, Zijia; Multer, Daniel; Vekhter, Ilya; Shelton, William; Jin, Rongying; Xu, Suyang; Hasan, Zahid | In this talk, I will present our ultrahigh resolution photoemission study on a superconducting metal that hosts three doubly degenerate quadratic bands at the R point, demonstrating a topological fermion beyond the constraints of high energy physics. | Session 37: Electronic Structure and Magnetism in Topological Materials |

558 | Strong-coupling mechanism of the pseudogap in small Hubbard clusters | Huang, Edwin | Here, we solve the Hubbard model on 2×2 clusters by exact diagonalization, with integration over twisted boundary conditions. | Session 38: Electronic Structure of Superconductors (Photoemission, etc.) |

559 | Electronic Structure of Doped 1D Cuprate Chains | Chen, Zhuoyu; Wang, Yao; Rebec, Slavko; Jia, Tao; Hashimoto, Makoto; Lu, Donghui; Moritz, Brian; Moore, Robert; Devereaux, Thomas; Shen, Zhixun | Electronic Structure of Doped 1D Cuprate Chains | Session 38: Electronic Structure of Superconductors (Photoemission, etc.) |

560 | Signature of Tomonaga-Luttinger Liquid State in Epitaxial CoSb Nanoribbons | Lou, Rui; Lei, Minyinan; Ding, Wenjun; Yang, Wentao; Chen, Xiaoyang; Tao, Ran; Ding, Shuyue; Shen, Xiaoping; Yan, Yajun; Cui, Ping; Xu, Haichao; Peng, Rui; Zhang, Tong; Zhang, Zhenyu; Feng, Donglai | Signature of Tomonaga-Luttinger Liquid State in Epitaxial CoSb Nanoribbons | Session 38: Electronic Structure of Superconductors (Photoemission, etc.) |

561 | Electronic Structure across the Rare-Earth Series in Superconducting Infinite Layer Nickelates | Been, Emily; Lee, Wei-Sheng; Hwang, Harold; Cui, Yi; Zaanen, Jan; Devereaux, Thomas; Moritz, Brian; Jia, Chunjing | Electronic Structure across the Rare-Earth Series in Superconducting Infinite Layer Nickelates | Session 38: Electronic Structure of Superconductors (Photoemission, etc.) |

562 | Electronic structure of the all-epitaxial NbN/GaN interface | Pamuk, Betul; Yu, Tianlun; Wright, John; Khalsa, Guru; Chang, Celesta; Matveyev, Yury; Schmitt, Thorsten; Feng, Donglai; Muller, David; Xing, Huili; Jena, Debdeep; Strocov, Vladimir | We present a combined experimental and theoretical study of the electronic structure of the all-epitaxial NbN/GaN interface using soft-X-ray angle-resolved photoemission spectroscopy and first-principles calculations. | Session 38: Electronic Structure of Superconductors (Photoemission, etc.) |

563 | Effect of screening on high-energy phonon branches in NdBa2Cu3O7-x | Martinelli, Leonardo; Rossi, Matteo; Arpaia, Riccardo; Moretti, Marco; Salluzzo, Marco; Walters, Andrew; Zhou, Ke-jin; Braicovich, Lucio; Ghiringhelli, Giacomo | Using Resonant Inelastic X-ray Scattering (RIXS) at the oxygen K-edge we have studied how the coupling between Fermi electrons and the highest-energy phonon branches is affected by the screening of free carriers in NdBa 2Cu 3O 7-x, from the strongly under-doped to the optimally doped region. | Session 38: Electronic Structure of Superconductors (Photoemission, etc.) |

564 | Three interaction energy scales in single-layer high-Tc cuprate HgBa2CuO4+δ | Sreedhar, Sudheer Anand; Rossi, Antonio; Nayak, Jayita; Anderson, Zachary; TANG, YANG; Gregory, Benjamin; Hashimoto, Makoto; Lu, Donghui; Rotenberg, Eli; Birgeneau, Robert; Greven, Martin; Yi, Ming; Vishik, Inna | Here, we provide an ARPES study of doping-, temperature- and momentum-dependent systematics of near-nodal dispersion anomalies in Hg1201, revealing a hierarchy of three distinct energy scales. | Session 38: Electronic Structure of Superconductors (Photoemission, etc.) |

565 | First principles based theory of magnetic impurities embedded onto the surface of superconducting host, an application to FeNb(110) | Nyári, Bendegúz; Ujfalussy, Balazs; Szunyogh, László; Lászlóffy, András; Park, Kyungwha | In this talk we describe a new, first principles based theory of magnetic impurities on superconducting surfaces and multilayers. | Session 38: Electronic Structure of Superconductors (Photoemission, etc.) |

566 | Stability and superconductivity of compressed superhydride CeH9 with Dirac-nodal-line fermions | Wang, Chongze; Jeon, Hyunsoo; Yi, Seho; Liu, Shuyuan; Cho, Jun-Hyung | Stability and superconductivity of compressed superhydride CeH9 with Dirac-nodal-line fermions | Session 38: Electronic Structure of Superconductors (Photoemission, etc.) |

567 | Colossal Electron-Antiferromagnetic-Magnon Coupling Induced Band Renormalization that Drives a Stoner Ferromagnetism | Yu, Tianlun; Peng, Rui; Xu, Min; Yang, Wentao; Song, Yuanhe; Wen, Chenhaoping; Yao, Qi; Lou, Xia; Zhang, Tong; Li, Wei; Wei, Xinyuan; Cao, Guang-Han; Dudin, Pavel; Denlinger, Jonathan; Strocov, Vladimir; Xu, Haichao; Feng, Donglai | Here we directly observe that EAI induces a kink structure in the band dispersion in Ba 1-xK xMn 2As 2, and subsequently unveil several key characteristics of EAI. | Session 38: Electronic Structure of Superconductors (Photoemission, etc.) |

568 | Ab initio description of the Bi2Sr2CaCu2O8+δ electronic structure | Nokelainen, Johannes; Lane, Christopher; Markiewicz, Robert; Barbiellini, Bernardo; Pulkkinen, Aki; Singh, Bahadur; Sun, Jianwei; Pussi, Katariina; Bansil, Arun | Ab initio description of the Bi2Sr2CaCu2O8+δ electronic structure | Session 38: Electronic Structure of Superconductors (Photoemission, etc.) |

569 | Termination-dependent electronic structure of LaFeAsO revealed by nano-ARPES | Jung, Sungwon; Watson, Matthew; Rhodes, Luke; Evtushinsky, Daniil; Cacho, Cephise; Aswartham, Saicharan; Wurmehl, Sabine; Büchner, Bernd; Kim, Timur | We report the experimental electronic structures as measured on both LaO and FeAs terminations using photoemission spectroscopy with a sub-micron focused beam-spot (nano-ARPES). | Session 38: Electronic Structure of Superconductors (Photoemission, etc.) |

570 | Evolution of Electronic Spectral Weight in the Hubbard ladder | Kohno, Masanori | Here, the evolution of the electronic states as a function of the electron density is illustrated in the Hubbard ladder in the strong Coulomb repulsion and strong intra-rung hopping regime using the non-Abelian dynamical density-matrix renormalization group method and perturbation theory. | Session 38: Electronic Structure of Superconductors (Photoemission, etc.) |

571 | Correlation between superconducting transition temperatures and physical properties | Quan, Yundi; Xie, Stephen; Stewart, Gregory; Hamlin, James; Hirschfeld, Peter; Hennig, Richard | We analyze the correlation between the superconducting transition temperatures and the physical properties in the normal state, extending the previous work by Hirsch[1]. | Session 38: Electronic Structure of Superconductors (Photoemission, etc.) |

572 | When superconductivity does not fear magnetism: Insight into electronic structure of RbEuFe4As4 | Kim, Timur; Pervakov, Kirill; Evtushinsky, Daniil; Jung, Sungwon; Poelchen, Georg; Kummer, Kurt; Vlasenko, Vladimir; Pudalov, Vladimir; Roditchev, Dimitri; Stolyarov, Vasily; Vyalikh, Denis; Borisov, Vladislav; Valenti, Roser; Ernst, Arthur; Eremeev, Sergey; Chulkov, Eugene | Using angle-resolved photoemission spectroscopy, we reveal a complex three dimensional electronic structure and compare it with density functional theory calculations. | Session 38: Electronic Structure of Superconductors (Photoemission, etc.) |

573 | Topological Surface State Evolution in Chemical Etching of Bi2Se3 | Wang, Ruohan; Hou, Yusheng; Rong, Hongtao; Wu, Han; Guo, Yucheng; Zhang, Yichen; Wu, Ruqian; Huang, Jianwei; Yi, Ming | In this talk, the detailed band structure evolution of pristine Bi 2Se 3 sample under surface etching measured by ARPES will be presented, with an emphasis on the topological surface state. | Session 39: Electronic Structure of Topological Insulators and Interacting Topological Systems |

574 | Ab initio study of surface states in Bi4Te3 | Ashour, Omar; Louie, Steven; Li, Zhenglu | In this work, we perform ab initio density functional theory calculations of bulk and slab geometries to further investigate the surface states of Bi 4Te 3. | Session 39: Electronic Structure of Topological Insulators and Interacting Topological Systems |

575 | Dirac electronic states of Bi2Se3 thin films on ferromagnetic Cr2Si2Te6 studied by high-resolution ARPES | Kato, Takemi; Sugawara, Katsuaki; Ito, Naohiro; Yamauchi, Kunihiko; Sato, Takumi; Oguchi, Tamio; Takahashi, Takashi; Shiomi, Yuki; Saitoh, Eiji; Sato, Takafumi | In this talk, we will show temperature dependence of band structure across T C of CST, and discuss the origin of modulation of Dirac electronic states in Bi 2Se 3/CST heterostructure in terms of the lattice strain effect, interfacial coupling, and magnetic proximity effect. | Session 39: Electronic Structure of Topological Insulators and Interacting Topological Systems |

576 | Absence of equilibrium edge currents in theoretical models of topological insulators | Chen, Wei | We demonstrate that if the low-energy sector of TIs is regularized in a straightforward manner into a square or cubic lattice, then the current from the edge states is in fact canceled out exactly by that from the valence bands, rendering no edge current [1]. | Session 39: Electronic Structure of Topological Insulators and Interacting Topological Systems |

577 | Temperature-dependent electronic structure in a higher order topological insulator candidate EuIn2As2 | Regmi, Sabin; Hosen, Md Mofazzel; Ghosh, Barun; Singh, Bahadur; Dhakal, Gyanendra; Sims, Christopher; Wang, Baokai; Kabir, Firoza; Dimitri, Klauss; Liu, Yangyang; Agarwal, Amit; Lin, Hsin; Kaczorowski, Dariusz; Bansil, Arun; Neupane, Madhab | In this talk, we will present a systematic study on the electronic structure of EuIn 2As 2 and its evolution across the antiferromagnetic transition below 16 K by utilizing high-resolution angle-resolved photoemission spectroscopy combined with parallel first-principles computation. | Session 39: Electronic Structure of Topological Insulators and Interacting Topological Systems |

578 | Temperature-Induced Topological Phase Transition in Quasi-One-Dimensional Material Bi4I4 | Huang, Jianwei; Li, Sheng; Oh, Ji Seop; Wu, Han; Liu, Xiaoyuan; Guo, Yucheng; Zhang, Yichen; Hashimoto, Makoto; Lu, Donghui; Denlinger, Jonathan; Birgeneau, Robert; Zhang, Fan; Lv, Bing; Yi, Ming | In this talk, temperature dependent ARPES experimental results on different surfaces of Bi 4I 4 across the structural transition will be presented. | Session 39: Electronic Structure of Topological Insulators and Interacting Topological Systems |

579 | 2D Fermi surface and topological states in the CDW compound TaTe4 | Gonçalves, Pedro Henrique; Thees, Maximilian; Bouwmeester, Rosa Luca; David, Emma; Frantzeskakis, Emmanouil; Fortuna, Franck; Le Fèvre, Patrick; Magalhães-Paniago, Rogério; Giraldo-Gallo, Paula; Santander-Syro, Andrés | We performed Angular-resolved Photoemission spectroscopy (ARPES) measurements in TaTe 4 single crystals grown by a self-flux technique. | Session 39: Electronic Structure of Topological Insulators and Interacting Topological Systems |

580 | Spin-polarized tunable photocurrents | Berdakin, Matias; Rodriguez-Mena, Esteban; Foa Torres, Luis | But beyond this weak-coupling regime, Floquet-engineering has shown that we can use light to change the band-structure of a material and even its topology, generating a Hall response. | Session 39: Electronic Structure of Topological Insulators and Interacting Topological Systems |

581 | Probing the gap of single layer WTe2 by tunnel capacitance spectroscopy | Zalys-Geller, Evan; de la Barrera, Sergio; Wang, Xirui; Yasuda, Kenji; Jarillo-Herrero, Pablo; Ashoori, Raymond | Probing the gap of single layer WTe2 by tunnel capacitance spectroscopy | Session 39: Electronic Structure of Topological Insulators and Interacting Topological Systems |

582 | Observation of Dirac Band Splitting in a Peierls Semimetal (TaSe4)2I | Yi, Hemian; Min, Lujin; Huang, Zengle; Wu, Rui; Zhang, Ruoxi; Zhao, Yifan; Zhou, Ling-Jie; Chan, Moses; Xie, Weiwei; Wu, Weida; Mao, Zhiqiang; Wang, Zhijun; Chang, Cui-Zu | Here, we performed the angle-resolved photoemission spectroscopy (ARPES) measurements on the (110) surface of (TaSe 4) 2I and observed two sets of Dirac-cone-shaped bands. | Session 39: Electronic Structure of Topological Insulators and Interacting Topological Systems |

583 | Saddle-point Van Hove singularity in the topological surface states of Pt2HgSe3 | Ghosh, Barun; Mardanya, Sougata; Singh, Bahadur; ZHOU, XIAOTING; Wang, Baokai; Chang, Tay-Rong; Su, Chenliang; Lin, Hsin; Agarwal, Amit; Bansil, Arun | Here, based on first-principles calculations combined with a kp model Hamiltonian analysis, we show that the layered platinum mineral jacutingaite (Pt 2HgSe 3) harbors saddlelike topological surface states with associated Van Hove singularities [1]. | Session 39: Electronic Structure of Topological Insulators and Interacting Topological Systems |

584 | Fermi Surface of Frustrated Kagome Metal CoSn | Wei, Kaya; Galeano Cabral, Jorge; Olatunde, Oladehin; Karr, Eliana; Graf, David; Baumbach, Ryan; Siegrist, Theo | In this talk we will discuss detailed results of the Fermi surface topology measurements and prospects for tuning the Fermi level. | Session 39: Electronic Structure of Topological Insulators and Interacting Topological Systems |

585 | Observation of a topological drumhead surface state in a topological semimetal | Mori, Ryo; Wang, Kefeng; Morimoto, Takahiro; Denlinger, Jonathan; Paglione, Johnpierre; Lanzara, Alessandra | We will present the experimental evidence of nearly-flat drumhead surface states in a topological semimetal BaAl 4 using angle-resolved photoemission spectroscopy and discuss these results in terms of correlations. | Session 39: Electronic Structure of Topological Insulators and Interacting Topological Systems |

586 | Observation of optical absorption correlated with surface state of topological insulator | Jeon, Jiwon; Choi, Eunjip | We performed broadband optical transmission measurements of Bi2Se3 and In-doped (Bi1−xInx )2Se3 thin films, where in the latter the spin-orbit coupling (SOC) strength can be tuned by introducing In. | Session 39: Electronic Structure of Topological Insulators and Interacting Topological Systems |

587 | Nonsymmorphic Symmetry-Protected Band Crossings in a Correlated Metal | Wu, Han; Hallas, Alannah; Cai, Xiaochan; Huang, Jianwei; Loganathan, Vaideesh; Weiland, Ashley; McCandless, Gregory; Chan, Julia; Mo, Sung-Kwan; Lu, Donghui; Hashimoto, Makoto; Nevidomskyy, Andriy; Li, Gang; Morosan, Emilia; Yi, Ming | Here we will present our recent combined theory and angle-resolved photoemission spectroscopy study on PtPb 4. | Session 40: Electronic Structure of Topological Semimetals |

588 | STM/STS OF FEW-LAYER TOPOLOGICAL SEMIMETAL NiTe2 AT CRYOGENIC TEMPERATURES | Lough, Stephanie; Blue, Brandon; Le, Duy; Rahman, Talat; Ishigami, Masa | In this work, exfoliation of bulk NiTe 2 is performed under ultra-high vacuum (UHV) in order to generate a clean surface for scanning tunneling microscopy and spectroscopy (STM/STS) at cryogenic temperatures. | Session 40: Electronic Structure of Topological Semimetals |

589 | Detection of hole pockets in the candidate type-II Weyl semimetal MoTe2 from Shubnikov-de Haas quantum oscillations | HU, Yajian; Yu, Wing Chi; Lai, Kwing To; Sun, Dan; Balakirev, Fedor; Zhang, Wei; Xie, Jianyu; Jha, Rajveer; Higashinaka, Ryuji; Matsuda, Tatsuma; Yanase, Youichi; Aoki, Yuji; Goh, Swee | We report an unambiguous detection of these elusive hole pockets via Shubnikov–de Haas quantum oscillations. | Session 40: Electronic Structure of Topological Semimetals |

590 | Determination of the electron-phonon coupling with time-domain techniques reveal contrasting bond strengths in topological semimetal WTe2 | Gauthier, Nicolas; Soifer, Hadas; Gauthier, Alexandre; Boukahil, Idris; Pemmaraju, C Das; Sie, Edbert Jarvis; Nyby, Clara; Lindenberg, Aaron; Kirchmann, Patrick; Shen, Zhixun | We studied the electron and structural dynamics of the topological semimetal WTe 2 using time- and angle-resolved photoemission spectroscopy (trARPES), ultrafast electron diffraction (UED) and density functional theory (DFT). | Session 40: Electronic Structure of Topological Semimetals |

591 | Phonon magnetochiral effect of band-geometric origin in Weyl semimetals | Sengupta, Sanghita; Lhachemi, Nabil; Garate, Ion | We present a potentially measurable phonon magnetochiral effect of electronic origin in chiral Weyl semimetals. | Session 40: Electronic Structure of Topological Semimetals |

592 | Anisotropic Linear Optical Properties and Optical Resonances in Weyl Semimetals | Zu, Rui; Gu, Mingqiang; Min, Lujin; Hu, Chaowei; Ni, Ni; Mao, Zhiqiang; Rondinelli, James; Gopalan, Venkatraman | Here, we demonstrate a comprehensive study of anisotropic dielectric functions of TaAs and NbAs by combining spectroscopic ellipsometry and density functional theory (DFT). | Session 40: Electronic Structure of Topological Semimetals |

593 | Topological Lifshitz transitions and Fermi arc manipulation in Weyl semimetal NbAs | Yang, Haifeng; Yang, Lexian; Liu, Zhongkai; Sun, Yan; Bernevig, Andrei; Felser, Claudia; Yan, Binghai; Chen, Yulin | Here, by using in-situ surface decoration, we demonstrate successful manipulation of the shape, size and even the connections of SFAs in a model TWS, NbAs, and observe their evolution that leads to an unusual topological Lifshitz transition not caused by the change of the carrier concentration. | Session 40: Electronic Structure of Topological Semimetals |

594 | Observation of multi-fermionic states in Ti2Te2P | Dhakal, Gyanendra; Hosen, Md Mofazzel; Nandy, Ashis; Aperis, Alexandros; Dimitri, Klauss; Maldonado, Pablo; Sims, Christopher; Kabir, Firoza; Regmi, Sabin; Liu, Yangyang; Persaud, Luis; Kaczorowski, Dariusz; Oppeneer, Peter; Neupane, Madhab | Here we report the observation of the surface Dirac dispersion in a material Ti 2Te 2P at the M point of the Brillouin zone (BZ) in a tetradymite crystal structure employing angle-resolved photoemission spectroscopy (ARPES), which is in agreement with the first-principles calculations. | Session 40: Electronic Structure of Topological Semimetals |

595 | Studying ultrafast hot electron dynamics in topological nodal-line semimetal ZrSiS using XUV-based time- and angle-resolved photoemission spectroscopy | Liu, Yangyang; Hosen, Md Mofazzel; Dhakal, Gyanendra; Sims, Christopher; Beetar, John; Regmi, Sabin; Dimitri, Klauss; Kabir, Firoza; Kaczorowski, Dariusz; Chini, Michael; Neupane, Madhab | We study the ultrafast hot electron cooling process on topological nodal-line semimetal ZrSiS using an advanced XUV-based time- and angle-resolved photoemission spectroscopy (trARPES) with sub-30 meV energy resolution and 320 fs time resolution. | Session 40: Electronic Structure of Topological Semimetals |

596 | Kramers Nodal Line Metals | Xie, Yingming; Gao, Xuejian; Xu, Xiao Yan; Zhang, Cheng-Ping; Hu, Jinxin; Law, Kam Tuen | In this work, we show that all achiral non-centrosymmetric materials with SOC belong to a new class of topological materials, which we term Kramers nodal line metals (KNLMs). | Session 40: Electronic Structure of Topological Semimetals |

597 | Using Chemical Pressure to Tune the Electronic State in the Topological Metal Zr2Te2P | Olatunde, Oladehin; Baumbach, Ryan; Graf, David; Wei, Kaya; Galeano-Cabral, Jorge | To explore this, we examined the chemical substitution series Zr 2(Te 1-xSe x) 2P. | Session 40: Electronic Structure of Topological Semimetals |

598 | Two phase transitions driven by surface electron doping in WTe2 | Rossi, Antonio; Resta, Giacomo; Lee, Seng Huat; Redwing, Ronald; Jozwiak, Chris; Bostwick, Aaron; Rotenberg, Eli; Savrasov, Sergey; Vishik, Inna | Here we show via angle resolved photoemission spectroscopy (ARPES), that surface electron doping in WTe 2 can induce a shear displacement in the top layers, producing a crystal structure locally similar to a polytype typically not encountered in ambient conditions. | Session 40: Electronic Structure of Topological Semimetals |

599 | Signatures of a topological Weyl loop in magnetic semimetal Co3Sn2S2 | Cheng, Zijia; Belopolski, Ilya; Cochran, Tyler; Tsirkin, Stepan; Yin, Jiaxin; Zhang, Songtian; Liu, Xiaoxiong; Chang, Guoqing; Yang, Xian; Multer, Daniel; Kim, Timur; Cacho, Cephise; Felser, Claudia; Neupert, Titus; Zahid, Hasan | Here we present our high-resolution angle-resolved photoemission spectroscopy results on single crystals of Co3Sn2S2 in its ferromagnetic phase. | Session 40: Electronic Structure of Topological Semimetals |

600 | Intertwined non-trivial band topology and giant Rashba spin splitting in KSnSb1-xBix | Mondal, Chiranjit; Barman, Chanchal; Alam, Aftab; Pathak, Biswarup | We have presented a general symmetry based mechanism, supported by ab-initio calculations to achieve intertwined giant Rashba splitting and topological nontrivial states simultaneously in a single crystalline system. | Session 40: Electronic Structure of Topological Semimetals |

601 | Observation of Surface States in Concentric Nodal Line Semimetal Candidate ZrP2 | Sims, Christopher; Hosen, Md Mofazzel; Kabir, Firoza; Aramberri, Hugo; Huang, Cheng-Yi; Dhakal, Gyanendra; Dimitri, Klauss; Regmi, Sabin; Zhou, Xiaoting; Chang, Tay-Rong; Lin, Hsin; Kaczorowski, Dariusz; Kioussis, Nicholas; Neupane, Madhab | Here, we present a systematic angle-resolved photoemission spectroscopy study of a topological nodal-line semi metallic state in the transition metal dipnictide ZrP2. | Session 40: Electronic Structure of Topological Semimetals |

602 | Dynamic response functions of two-dimensional Dirac fermions with screened Coulomb and short-range interactions | Agarwal, Megha; Mishchenko, Eugene | We consider a screened Coulomb interaction between electrons in graphene and determine their dynamic response functions, such as a longitudinal and a transverse electric conductivity and a polarization function and compare them to the corresponding quantities in the short-range interaction model. | Session 41: Electronic and Thermal Transport Properties of Graphene |

603 | Spin-valley collective modes of the electron liquid in graphene | Raines, Zachary; Falko, Vladimir; Glazman, Leonid | We develop the theory of collective modes supported by a Fermi liquid of electrons in pristine graphene. | Session 41: Electronic and Thermal Transport Properties of Graphene |

604 | Mechanical and Electronic Properties of Graphene under Periodically Modulated Strain | Banerjee, Riju; Nguyen, Viet-Hung; Kowalik, Malgorzata; Granzier-Nakajima, Tomotaroh; Lherbier, Aurelien; Pabbi, Lavish; Terrones, Mauricio; Van Duin, Adri; Charlier, Jean-Christophe; Hudson, Eric | We present a novel approach to create an effective 2D lateral heterostructure – by periodic modulation of lattice strain. | Session 41: Electronic and Thermal Transport Properties of Graphene |

605 | Mechanisms of Andreev reflection in graphene in a quantum Hall regime | Manesco, Antonio; Flór, Ian Matthias; Liu, Chun-Xiao; Akhmerov, Anton | We explore nonlocal Andreev signatures at the zeroth Landau level of quantum Hall (QH) graphene, considering effects of (i) disorder and (ii) Fermi energy mismatch between graphene and the superconductor (SC). | Session 41: Electronic and Thermal Transport Properties of Graphene |

606 | Quasiparticle scattering induced by native defects in graphene devices | Joucken, Frederic; Bena, Cristina; Ge, Zhehao; Kaladzhyan, Vardan; Pinon, Sarah; Quezada, Eberth; Taniguchi, Takashi; Watanabe, Kenji; Velasco Jr., Jairo | We report scanning tunneling microscopy results which demonstrate for the first time the presence of native defects and their effect on the electronic properties of Bernal-stacked bilayer graphene devices. | Session 41: Electronic and Thermal Transport Properties of Graphene |

607 | Dirac Point Photo-Thermionic Response at the Graphene-Boron Nitride Interface | Wan, Jacky; Arp, Trevor; Gabor, Nathaniel | Utilizing a near-infrared scanning pulsed laser, we explore the inter- and intra-layer photocurrent of a pixel consisting of two graphene layers separated by an ultrathin tunneling barrier. | Session 41: Electronic and Thermal Transport Properties of Graphene |

608 | Thermal transport in compensated semimetals: a mystery explained | Zarenia, Mohammad; Principi, Alessandro; Vignale, Giovanni | We present a quantitative theory of the crossover from ambipolar to unipolar conduction as a function of the size of the electron-hole accumulation regions, and show that it naturally leads to a sample-size-dependent thermal conductivity. | Session 41: Electronic and Thermal Transport Properties of Graphene |

609 | Measurement of the electronic heat capacity of graphene | Mohammed Ali, Aamir; Moore, John N.; Lu, Xiaobo; Seifert, Paul; Englund, Dirk; Fong, Kin; Efetov, Dmitri | Here, we develop a proof-of-concept electronic calorimeter with record sensitivity (< 10 -20 J/K) by combining a ~20 mK/Hz 1/2–sensitive Johnson-noise thermometer with a novel optical heater operating in the low terahertz frequency domain. | Session 41: Electronic and Thermal Transport Properties of Graphene |

610 | Probing spin and valley states in bilayer graphene quantum dots | Volk, Christian; Banszerus, Luca; Möller, Samuel; Hecker, Katrin; Steiner, Corinne; Icking, Eike; Watanabe, Kenji; Taniguchi, Takashi; Stampfer, Christoph | Here, we study the spin and valley texture of a BLG QD. | Session 41: Electronic and Thermal Transport Properties of Graphene |

611 | Acoustic Plasmon Focusing in Graphene with an Applied Current. | Sammon, Michael; Margetis, Dionisios; Low, Tony | Here we present a theory of the nonreciprocity induced in the acoustic plasmon spectrum of a graphene-dielectric-metal system with an applied current bias. | Session 41: Electronic and Thermal Transport Properties of Graphene |

612 | Coherent Jetting behind a gate-defined Channel in Bilayer Graphene | Gold, Carolin; Knothe, Angelika; Kurzmann, Annika; Garcia-Ruiz, Aitor; Watanabe, Kenji; Taniguchi, Takashi; Falko, Vladimir; Ensslin, Klaus; Ihn, Thomas | We find that these jets, which are visible via their interference patterns, occur predominantly with an angle of 60° between each other. | Session 41: Electronic and Thermal Transport Properties of Graphene |

613 | Electrostatic Tuning of Correlations in Graphene | Dale, Nicholas; Mori, Ryo; Utama, Iqbal; Denlinger, Jonathan; Stansbury, Conrad; Zhao, Sihan; Lee, Kyunghoon; Taniguchi, Takashi; Watanabe, Kenji; Rotenberg, Eli; Koch, Roland; Bostwick, Aaron; Jozwiak, Chris; wang, feng; Lanzara, Alessandra | In this talk, I will discuss recent in-operando angle-resolved photoemission studies on graphene where we directly visualize modifications of its electronic band structure upon tuning the Fermi Energy. | Session 41: Electronic and Thermal Transport Properties of Graphene |

614 | Open quantum dot in encapsulated graphene | Sakanashi, Kohei; Wada, Naoto; Watanabe, Kenji; Taniguchi, Takashi; Kim, Gil-ho; Ferry, David; Bird, Jonathan; Huang, Liang; Aoki, Nobuyuki | In this study, we realized the high-quality etch-defined GOQD in hBN-encapsulated monolayer graphene by using the PC-polymer based dry-transfer and one-dimensional edge contact techniques. | Session 41: Electronic and Thermal Transport Properties of Graphene |

615 | Sizable Band Gap in Epitaxial Bilayer Graphene Induced by Silicene Intercalation | Guo, Hui; Zhang, Ruizi; Li, Hang; Ding, Hong; Du, Shixuan; Pantelides, Sokrates; Gao, Hongjun | Here, we report the generation of a sizable band gap in BLG by intercalating silicene between BLG and Ru substrate. | Session 41: Electronic and Thermal Transport Properties of Graphene |

616 | Anisotropic dispersion of dielectric permittivity of few-layer ReS2 | Chakrabarty, Devarshi; Dhara, Avijit; Das, Pritam; Pattanayak, Aswini Kumar; Paul, Shreya; Mukherjee, Shreyashi; Dhara, Sajal | Here, we present polarisation-resolved reflectance measurements performed on few-layer ReS 2 exfoliated on SiO 2/Si substrate. | Session 42: Electronic and Transport Properties of Transition Metal Dichalcogenides |

617 | Spin-valley locked instabilities in moire transition metal dichalcogenides with conventional and higher-order Van Hove singularities | Hsu, Yi-Ting; Wu, Fengcheng | Here, we perform a perturbative RG analysis to study the dominant instabilities in homo-bilayer TMDs for both the conventional and higher-order VHS cases. | Session 42: Electronic and Transport Properties of Transition Metal Dichalcogenides |

618 | Insights into negative differential resistance in MoS2 Esaki diodes: A first-principles perspective | Bruce, Adam; Liu, Shuanglong; Fry, James; Cheng, H-P. | We present our findings, using density functional theory with non-equilibrium Green’s functions (DFT + NEGF), on the relation between band alignment and transmission in both planar and side-stack MoS 2 p-i-n junction configurations. | Session 42: Electronic and Transport Properties of Transition Metal Dichalcogenides |

619 | Insulating States in WSe2 Twisted From 60 Degrees | Pack, Jordan; Shi, Qianhui; Liu, Song; Watanabe, Kenji; Taniguchi, Takashi; Hone, James; Dean, Cory | We will present electronic transport and compressibility measurements of the correlated insulating states in these heterostructures. | Session 42: Electronic and Transport Properties of Transition Metal Dichalcogenides |

620 | Area, temperature, velocity, and edge effects in the sliding of structurally lubric 2D materials | Wang, Jin; Khosravi, Ali; Vanossi, Andrea; Tosatti, Erio | Area, temperature, velocity, and edge effects in the sliding of structurally lubric 2D materials | Session 42: Electronic and Transport Properties of Transition Metal Dichalcogenides |

621 | Measurement of Conduction and Valence Bands g-factors in a Transition Metal Dichalcogenide Monolayer | Ren, Lei; ROBERT, Cedric; Dery, Hanan; Van Tuan, Dinh; Courtade, Emmanuel; Yang, Min; Urbaszek, Bernhard; Lagarde, Delphine; Watanabe, Kenji; Taniguchi, Takashi; Amand, Thierry; Marie, Xavier | Here we present an original method that gives access to the respective contribution of the conduction and valence band to the measured Zeeman splitting. | Session 42: Electronic and Transport Properties of Transition Metal Dichalcogenides |

622 | A unique pentagonal network structure of the NiS2 monolayer with high stability and a tunable bandgap | Wang, Chang-Tian; Du, Shixuan | Here, with the help of ab initio calculations based on density functional theory, we report a unique pentagonal structured NiS 2 monolayer in P-42 1m symmetry, named P-NiS 2. | Session 42: Electronic and Transport Properties of Transition Metal Dichalcogenides |

623 | Studying Strain Dependence of Electronic and Structural Phases in Tantalum Disulfide | Torres-Londono, Susana; Haley, Shannon; Aravinth, Meera; Weber, Sophie; Analytis, James; Griffin, Sinead | In this talk, I will discuss the structural and electronic phase diagram of 1T and 2H phases of TaS2 with the application of pressure and strain using Density Functional Theory. | Session 42: Electronic and Transport Properties of Transition Metal Dichalcogenides |

624 | Charge Density Wave Proximity Effect in Graphene on 1T-TaS2 | Altvater, Michael; Hung, Sheng-Hsiung; Tilak, Nikhil; Won, Choong-Jae; Li, Guohong; Cheong, Sang-Wook; Chung, Chung-Hou; Jeng, Horng-Tay; Andrei, Eva | Here, we provide microscopic evidence, by means of scanning tunneling microscopy/spectroscopy and modelling based on density functional theory, of a novel proximity induced charge density wave in graphene placed on 1T-TaS 2. | Session 42: Electronic and Transport Properties of Transition Metal Dichalcogenides |

625 | Anisotropic Phonon Modes and Thermal conductivities of the quasi-1D materials TaSe3 and ZrTe3 | Debnath, Topojit; Debnath, Bishwajit; Lake, Roger | To understand their thermal transport properties, we determined their phonon spectra and thermal conductivities using density functional theory and the phonon Boltzmann transport equation. | Session 42: Electronic and Transport Properties of Transition Metal Dichalcogenides |

626 | Unveiling the metallic phases of twisted transition metal dichalcogenides | Ghiotto, Augusto; Shih, En-Min; Pereira, Giancarlo; Wang, Lei; Xian, Lede; Rhodes, Daniel; Tan, Cheng; Kennes, Dante; Claassen, Martin; Bai, Yusong; Kim, Bumho; Watanabe, Kenji; Taniguchi, Takashi; Zhu, Xiaoyang; Hone, James; Rubio, Angel; Dean, Cory; Narayan, Abhay | Unlike twisted bilayer graphene where the flat band appears only within a narrow range around a “magic angle", we have observed correlated insulating states over a continuum of angles, spanning 4° to 5.1°. | Session 42: Electronic and Transport Properties of Transition Metal Dichalcogenides |

627 | Unraveling chemical bonding and Born charge in 1T-HfS2 | Neal, Sabine; Li, Shutong; Birol, Turan; Musfeldt, Janice | We combine infrared absorption and Raman scattering spectroscopies to explore the properties of 1T-HfS 2- a heavy transition metal chalcogenide with strong spin-orbit coupling due to incorporation of the 5 d center. | Session 42: Electronic and Transport Properties of Transition Metal Dichalcogenides |

628 | Metallicity of 2H-MoS2 Induced by Au Hybridization | Ishigami, Masa; Lough, Stephanie; Smalley, Darian; Rahman, Talat; Le, Duy; Blue, Brandon | In this work, we directly exfoliate monolayer MoS 2 onto bulk Au and anneal the resulting heterostructure under ultra-high vacuum (10 -10 Torr, UHV) to 450 °C. | Session 42: Electronic and Transport Properties of Transition Metal Dichalcogenides |

629 | Quantitative measurement of layer-to-layer electronic coupling in bilayer MoS2 | Hsu, Wei-Ting; Quan, Jiamin; Chen, Peng-Jen; Chang, Wen-Hao; Li, Xiaoqin (Elaine); Lin, Jung-Fu; Shih, Chih-Kang | Here, by measuring the optical transition of bilayer MoS 2 in the diamond anvil cell, we quantitatively determined the interlayer coupling at various critical points of the Brillouin zone. | Session 42: Electronic and Transport Properties of Transition Metal Dichalcogenides |

630 | Interlayer coupling induced two-dimensional electron lattice in transition metal dichalcogenides thin-films | Manchanda, Priyanka; Naumov, Ivan; Dev, Pratibha | Using density functional theory-based calculations, we show that the interlayer interaction between the transition metal dichalcogenides layers also gives rise to an electronic lattice, which is formed between the layers. | Session 42: Electronic and Transport Properties of Transition Metal Dichalcogenides |

631 | Electronic structure and magnetism in infinite-layer nickelates RNiO2 (R= La-Lu) | Kapeghian, Jesse; Botana, Antia | Using first-principles calculations, we analyze the evolution of the electronic structure and magnetic properties of infinite-layer nickelates RNiO 2 (R= rare-earth) as R changes across the lanthanide series from La to Lu. | Session 43: Electronic, Magnetic, and Structural Properties of Nickelates |

632 | Many body electronic structure of infinite layer and trilayer nickelates | Karp, Jonathan; Hampel, Alexander; Zingl, Manuel; Botana, Antia; Park, Hyowon; Norman, Michael; Millis, Andrew | Motivated by recent experiments on infinite layer (RNiO 2) and trilayer (R 4Ni 3O 8) nickelate analogs of cuprate superconductors, we use a combination of density functional and dynamical mean field (DFT+DMFT) methods to perform a comparative study many body electronic structure of these materials, with a focus on CaCuO 2, NdNiO 2, and Pr 4Ni 3O 8. | Session 43: Electronic, Magnetic, and Structural Properties of Nickelates |

633 | Electronic and structural changes in SmNiO3 perovskite under doping with hydrogen | Zaluzhnyy, Ivan; Sprau, Peter; Tran, Richard; Wang, Qi; Zhang, Hai-Tian; Zhang, Zhen; Hua, Nelson; Stoychev, Boyan; Cherukara, Mathew; Holt, Martin; Nazarertski, Evgeny; Huang, Xiaojing; Yan, Hanfei; Pattammattel, Ajith; Chu, Yong; Ong, Shyue Ping; Ramanathan, Shriram; Shpyrko, Oleg; Frano, Alex | We used nanofocused x-ray beam for spectroscopic and diffraction studies of the hydrogen-doped SmNiO 3 film. | Session 43: Electronic, Magnetic, and Structural Properties of Nickelates |

634 | Electronic structure and magnetic properties of higher-order layered nickelates: Lan+1NinO2n+2 (n = 4 – 6) | LaBollita, Harrison; Botana, Antia | From our calculations, we find that the cuprate-like character of layered nickelates increases from the n = ∞ to the n = 3 members as the charge transfer energy and the self-doping effect due to R- d bands around the Fermi level gradually decrease. | Session 43: Electronic, Magnetic, and Structural Properties of Nickelates |

635 | Hund’s metal physics: from SrNiO2 to LaNiO2 | Wang, Yilin; Kang, Changjong; Miao, Hu; Kotliar, Gabriel | We study the normal state electronic structure of the recently discovered infinite-layer nickelate superconductor, Nd 1-xSr xNiO 2, using DFT+DMFT calculations. | Session 43: Electronic, Magnetic, and Structural Properties of Nickelates |

636 | Infinite-layer nickelates as Ni eg Hund’s metals | Kang, Byungkyun; Melnick, Corey; Sémon, patrick; Kotliar, Gabriel; Choi, Sangkook | By using ab initio LQSGW+DMFT methodology, we show that onsite Hund’s coupling in Ni d orbitals gives rise to multiple signatures of Hund’s metallic phase in Ni d subshell. | Session 43: Electronic, Magnetic, and Structural Properties of Nickelates |

637 | Structural signatures of the insulator-to-metal transition in BaCo1-xNixS2 | Schueller, Emily; Miller, Kyle; Zhang, William; Zuo, Julia; Rondinelli, James; Wilson, Stephen; Seshadri, Ram | Here we present density functional theory-based electronic structure calculations on x = 0 BaCoS 2 and show that these displacements arise as a dynamic first-order Jahn-Teller effect owing to partial occupancy of nominally degenerate Co 2+ dxz and dyz orbitals. | Session 43: Electronic, Magnetic, and Structural Properties of Nickelates |

638 | Fluence dependent structural changes in photoexcited NdNiO3 thin films | Mehta, Jugal; Li, Jianheng; Smith, Scott; Jangid, Rahul; Albayati, Nadia; Ainslie, Kenneth; Walko, Donald; Wen, Haidan; Kukreja, Roopali | In this study, we focused on measuring the laser fluence dependent photoinduced structural response of epitaxial NdNiO3/ SrTiO3 thin films(NNO/STO) of 9 nm and 19 nm thickness. | Session 43: Electronic, Magnetic, and Structural Properties of Nickelates |

639 | Critical Self Organization of Antiferromagnetic Domains in Perovskite Nickelates | Basak, Rourav; Bluschke, Martin; Zaluzhnyy, Ivan; Hua, Nelson; Stoychev, Boyan; Shabalin, Anatoly; Fuersich, Katrin; Christiani, Georg; Roy, Sujoy; Dufresne, Eric; Barbour, Andi; Mazzoli, Claudio; Shpyrko, Oleg; Benckiser, Eva; Keimer, Bernhard; Frano, Alex | Here we study a thin film of PrNiO3 grown on a (LaAlO3)0.3(Sr2TaAlO6)0.7 (LSAT) substrate (tensile strain). | Session 43: Electronic, Magnetic, and Structural Properties of Nickelates |

640 | Structure and vibrations in rare-earth nickelates with nonempirical extended Hubbard functionals | Binci, Luca; Kotiuga, Michele; Timrov, Iurii; Marzari, Nicola | Motivated by these findings, we study the vibrational properties of the low-temperature phase of the praseodymium nickelate using extended (DFT+U+V) Hubbard functionals, to get more insight on the coupling between the structural and electronic degrees of freedom at the transition. | Session 43: Electronic, Magnetic, and Structural Properties of Nickelates |

641 | What drives the charge ordering in the rare-earth nickelates? | Mahadevan, Priya; Sarkar, Sagar; Mandal, Basudeb; Pandey, Shishir; Franchini, Cesare; Millis, Andrew; Das Sarma, Dipankar | We have explored the origin of the charge ordering by using an ab-initio approach to introduce an additional potential on the Ni d states, and thereby vary the effective charge transfer energy for the electron between the Ni and oxygen sites. | Session 43: Electronic, Magnetic, and Structural Properties of Nickelates |

642 | Doping evolution of the electronic and magnetic structure in RENiO3 | Li, Jiarui; Green, Robert; Zhang, Zhen; Sutarto, Ronny; Sadowski, Jerzy; Zhu, Zhihai; Zhang, Grace; Zhou, Da; Sun, Yifei; He, Feizhou; Ramanathan, Shriram; Comin, Riccardo | In this talk, I will present our recent soft X-ray absorption spectroscopy and imaging, resonant X-ray scattering, and extended multiplet ligand field theory modeling results on both pristine and electron doped RENiO 3. | Session 43: Electronic, Magnetic, and Structural Properties of Nickelates |

643 | Oxygen vacancy induced site-selective Mott transition in LaNiO3 | Liao, Xingyu; Singh, Vijay; Park, Hyowon | We find that LaNiO2.5 stabilizes a vacancy-ordered structure with an insulating ground state and the nature of the insulating phase is a “site-selective" paramagnetic Mott state as obtained using density functional theory plus dynamical mean field theory (DFT+DMFT). | Session 43: Electronic, Magnetic, and Structural Properties of Nickelates |

644 | Experiments and Model for the T → 0 Metal-Insulator Behavior of RNiO3: Evidence for a Bond-Percolation Transition. | Ponti, Gregorio; Timmers, Quinn; Irvine, Sara; Barajas, Alexander; Frieling, Holland; Moynihan, Lucas; Tebo, Jonathan D.; Markert, John | We model the T→0 M-I transition with bond percolation on the nearly simple-cubic lattice, assuming only that each small R ion breaks all 12 surrounding bonds; we predict a universal T→0 M-I transition for all La 1-x RxNiO 3 alloys. | Session 43: Electronic, Magnetic, and Structural Properties of Nickelates |

645 | Electronic structure of higher-order Ruddlesden Popper nickelates Rn+1NinO3n+1 (R = rare-earth, n = 4, 5, 6) | Botana, Antia; Pamuk, Betul; Krishna, Jyoti; Kapeghian, Jesse; LaBollita, Harrison; Dey, Dibyendu; Hanson, Chase | Electronic structure of higher-order Ruddlesden Popper nickelates Rn+1NinO3n+1 (R = rare-earth, n = 4, 5, 6) | Session 43: Electronic, Magnetic, and Structural Properties of Nickelates |

646 | Equilibrium exciton insulator and exciton quasi-condensation in semiconductor atomic double layers | Mak, Kin Fai | In this talk, I will present direct thermodynamic evidence for an equilibrium exciton insulator in TMD double layers. | Session 44: Excitonic and Photonic Behavior in 2D – |

647 | Interlayer exciton polarons in a MoSe2/WSe2 heterostructure | Brotons-Gisbert, Mauro; Campbell, Aidan; Baek, Hyeonjun; Watanabe, Kenji; Taniguchi, Takashi; Gerardot, Brian | In this work, we report the observation of interlayer (rather than intralayer) exciton (IX) polarons in the low-temperature photoluminescence of a gate-tunable MoSe 2/WSe 2 heterostructure. | Session 44: Excitonic and Photonic Behavior in 2D – |

648 | Equilibrium exciton insulator in semiconductor atomic double layers | Ma, Liguo; Nguyen, Phuong; Wang, Zefang; Watanabe, Kenji; Taniguchi, Takashi; Shan, Jie; Mak, Kin Fai | We provide direct thermodynamic evidence for an equilibrium exciton insulator in TMD double layers. | Session 44: Excitonic and Photonic Behavior in 2D – |

649 | Electrical generation of equilibrium exciton fluid in semiconductor atomic double layers | Nguyen, Phuong; Ma, Liguo; Wang, Zefang; Watanabe, Kenji; Taniguchi, Takashi; Shan, Jie; Mak, Kin Fai | Here we report the electrical generation of an equilibrium interlayer exciton fluid in WSe 2-hBN-MoSe 2 double layers. | Session 44: Excitonic and Photonic Behavior in 2D – |

650 | Interlayer excitons in the heterostrain induced moire of heterobilayer transition metal dichalcogenides | Zheng, Huiyuan; Zhai, Dawei; Yao, Wang | Here we investigate the optical properties of interlayer excitons in heterobilayer transition metal dichalcogenides where moire pattern is introduced by the uniaxial heterostrain, in comparison with that introduced by twisting. | Session 44: Excitonic and Photonic Behavior in 2D – |

651 | Enhancing exciton DOLP by scattering valley excitons in mono- and few-layer MoS2 | Gupta, Garima; Majumdar, Kausik | We observe that impurity scattering degrades DOLP in clean MoS 2 with low defect emission but significantly enhances it when MoS 2 has huge defect emission. | Session 44: Excitonic and Photonic Behavior in 2D – |

652 | Localization of interlayer excitons in nanoscale wrinkles investigated by nano-PL and nano-Raman spectroscopies | Darlington, Thomas | Here, I will show advanced near-field optical characterization of localized ILE’s in a MoSe 2-WSe 2-Au heterostructure. | Session 44: Excitonic and Photonic Behavior in 2D – |

653 | Multiple vibrational resonances and Franck-Condon palisades in the low temperature photocurrent spectrum of interlayer excitons | Barati, Fatemeh; Arp, Trevor; Su, Shanshan; Lake, Roger; Song, Justin; Rudner, Mark; Aji, Vivek; Gabor, Nathaniel | Here we report the emergence of strong exciton-phonon coupling in an atomically thin heterostructure composed of WSe 2 and MoSe 2. | Session 44: Excitonic and Photonic Behavior in 2D – |

654 | Separating electron-hole pairs: photocurrent imaging of interlayer exciton dissociation in van der Waals heterojunctions | Kistner-Morris, Jedediah; Arp, Trevor; Gabor, Nathaniel | We report optoelectronic transport imaging studies of WS 2-MoSe 2 heterojunctions over a range of device layer thickness. | Session 44: Excitonic and Photonic Behavior in 2D – |

655 | Davydov Splitting and Evolution of Molecular Excitons in Two-Dimensional PTCDA Crystals | Kim, Dogyeong; Ryu, Sunmin | In this work, single and few-layer PTCDA (perylene-3,4,9,10-tetracarboxylic dianhydride) crystals were grown on hexagonal BN by self-limited vapor assembly. | Session 44: Excitonic and Photonic Behavior in 2D – |

656 | Intralayer moiré exciton states in transition metal dichalcogenide heterostructures: a GW-BSE study | Naik, Mit; Chan, Yang-hao; Li, Zhenglu; Ong, Chin Shen; Da Jornada, Felipe; Louie, Steven | Using this method, we study the twist-angle dependence of the absorption spectrum of intralayer excitons in the WS 2/WSe 2 moiré superlattice. | Session 44: Excitonic and Photonic Behavior in 2D – |

657 | Probing interlayer excitons in transition-metal dichalcogenide heterostructures using time- and angle-resolved photoemission spectroscopy | Karni, Ouri; Barre, Elyse; Sahoo, Chakradhar; Man, Michael; Madéo, Julien; Georgaras, Johnathan; Ribeiro, Henrique; O’beirne, Aidan; Al-Mahboob, Abdullah; Abdelrasoul, Mohamed; Chan, Nicholas; Karmakar, Arka; Pareek, Vivek; Winchester, Andrew; Kim, Bumho; Watanabe, Kenji; Taniguchi, Takashi; Barmak, Katayun; Da Jornada, Felipe; Heinz, Tony; Dani, Keshav | In this talk, we present our direct observation of the full momentum-space image of ILXs in a WSe 2/MoS 2 heterostructure using time-resolved, angle-resolved photoemission spectroscopy. | Session 44: Excitonic and Photonic Behavior in 2D – |

658 | Luminescence anomaly of dipolar valley excitons in homobilayer semiconductor moiré superlattices | Yu, Hongyi; Yao, Wang | We find that the spatial texture of layer configuration results in a luminescence anomaly of the moiré trapped excitons, where a tiny displacement by interactions dramatically increases the brightness and changes polarization from circular to linear. | Session 44: Excitonic and Photonic Behavior in 2D – |

659 | Ground and excited state exciton polarons in monolayer MoSe2 | Yan, Jun; Goldstein, Thomas; Wu, Yueh-Chun; Chen, Shao-Yu; Taniguchi, Takashi; Watanabe, Kenji; Varga, Kalman | Using hexagonal boron nitride encapsulated monolayer MoSe2, we study the impact of charge density tuning on the A and B series of exciton Rydberg states, including A:1s, A:2s, B:1s, and B:2s. | Session 44: Excitonic and Photonic Behavior in 2D – |

660 | Phonon-exciton Interactions in WSe2 under a quantizing magnetic field | Miao, Shengnan; Li, Zhipeng; Wang, Tianmeng; Li, Yunmei; Zhang, Chuanwei; Shi, Sufei | In this talk, I will discuss our exploration of the phonon–exciton interaction in monolayer WSe2 in the regime of Landau quantization. | Session 44: Excitonic and Photonic Behavior in 2D – |

661 | Room temperature exciton modulation by surface acoustic wave in monolayer WSe2 | Datta, Kanak; Li, Zidong; Lyu, Zhengyang; Taniguchi, Takashi; Watanabe, Kenji; Deotare, Parag | Here, we investigate the photoluminescence from monolayer WSe 2 at room temperature under strong piezoelectric field generated by surface acoustic wave in lithium niobate (LiNbO 3). | Session 44: Excitonic and Photonic Behavior in 2D – |

662 | Waveguiding valley excitons in a homogeneous monolayer through dielectric-patterning of substrate | Yang, Xu-Chen; Yu, Hongyi; Yao, Wang | Here we show that dielectric patterning of the substrate can be exploited to realize waveguide of the exciton in the longitudinal branch, leaving the massive transverse branch unaffected. | Session 44: Excitonic and Photonic Behavior in 2D – |

663 | Long-lived populations of momentum- and spin-indirect excitons in monolayer WSe2 | Chen, Shao-Yu; Pieczarka, Maciej; Wurdack, Matthias; Estrecho, Eliezer; Taniguchi, Takashi; Watanabe, Kenji; Yan, Jun; Ostrovskaya, Elena; Fuhrer, Michael | Here, we show long-lived dense populations of the X K and the D excitons by performing time-resolved photoluminescence spectroscopy using a streak camera. | Session 44: Excitonic and Photonic Behavior in 2D – |

664 | Ultrafast Pump-Probe Nano-Imaging of Coupled Exciton-Phonons Dynamics and Interfacial Substrate Dissipation of WSe2 | Johnson, Samuel; Nishida, Jun; Chabal, Peter; Raschke, Markus | We present ultrafast visible-pump, infrared-probe nano-imaging and -spectroscopy, of monolayer and bulk WSe 2 on diamond, gold, and SiO 2 substrates. | Session 44: Excitonic and Photonic Behavior in 2D – |

665 | Fermi Liquid Theory Sheds Light on “Hot” EHL in 1L-MoS2 | Wilmington, Ryan; Ardekani, Hossein; Rustagi, Avinash; Bataller, Alexander; Kemper, Alexander; Younts, Robert; Gundogdu, Kenan | In this work we developed a methodology for analyzing the spectral evolution of the photoluminescence of suspended 1L-MoS 2 during the EHL phase transition by using Fermi liquid theory. | Session 44: Excitonic and Photonic Behavior in 2D – |

666 | Multiparticle Excitations, Spin-orbit Coupling, and Magnetism in the Photophysics of Quasi 2D Semiconductors | Louie, Steven | Using the ab initio many-body interacting Green’s function approach, we investigate manifestations of these interactions in several atomically thin 2D materials. | Session 44: Excitonic and Photonic Behavior in 2D – |

667 | Enhanced multiexciton formation by an electron-hole plasma in 2D semiconductors | Strasbourg, Matthew; Johns, Cory; Noble, Zoe; Yanev, Emanuil; Darlington, Thomas; Schuck, P. James; Hone, James; Borys, Nicholas | Using photoluminescence action spectroscopy of monolayer WSe 2, we find an enhancement of multiexciton formation with increasing excitation energy. | Session 44: Excitonic and Photonic Behavior in 2D – |

668 | Determination of scattering lifetime of the bright excitonic state in twisted bilayer graphene via resonant Raman spectroscopy | DeCapua, Matthew; Wu, Yueh-Chun; Yan, Jun | We use a reflection contrast technique to quickly identify this resonance, then follow up with Raman scattering measurements to track the evolution of the intensity of the graphene Raman G peak, corresponding to the E 2G phonon. | Session 44: Excitonic and Photonic Behavior in 2D – |

669 | Dynamic Exciton Spectra in WSe2-MoSe2 Moire Crystals | Embley, Jacob; Choi, Junho; Tran, Kha; Kim, Dong Seob; Taniguchi, Takashi; Watanabe, Kenji; Ueno, Keiji; Li, Xiaoqin (Elaine) | Dynamic Exciton Spectra in WSe2-MoSe2 Moire Crystals | Session 44: Excitonic and Photonic Behavior in 2D – |

670 | Direct measurement of interlayer exciton absorption in MoSe2/WSe2 heterostructures | Barre, Elyse; Karni, Ouri; O’beirne, Aidan; Ribeiro, Henrique; Kim, Bumho; Watanabe, Kenji; Taniguchi, Takashi; Barmak, Katayun; Da Jornada, Felipe; Refaely-Abramson, Sivan; Heinz, Tony | In this work, we present direct measurements of the ILX absorption resonances in MoSe 2/WSe 2 heterostructures for different twist angles using an electromodulation technique. | Session 44: Excitonic and Photonic Behavior in 2D – |

671 | Enhanced Photoluminescence in Encapsulated TFSI treated MoS2 | Tyson, Kurt; Godfrey, James; Fraser, James; Knobel, Robert | Here we demonstrate significantly enhanced photoluminescence (PL) up to an order of magnitude in MoS 2 using trifluoromethansulfonimide (TFSI) acid treatment. | Session 44: Excitonic and Photonic Behavior in 2D – |

672 | Anomalous diffusion in phase space of electron and electron-phonon fluids | Schmalian, Joerg | We study non-local hydrodynamic response of electron and combined electron-phonon fluids. | Session 45: Exotic Collective Excitations and Topology-Driven Dynamics in Quantum Materials |

673 | THz driving of superconducting collective modes: new advances and open questions | Benfatto, Lara | How to distinguish and characterise the different possible processes has been the subject of an intense experimental and theoretical research. | Session 45: Exotic Collective Excitations and Topology-Driven Dynamics in Quantum Materials |

674 | Hidden and mirage collective modes in two dimensional Fermi liquids | Klein, Avraham; Maslov, Dmitrii; Chubukov, Andrey | I will show that two-particle correlation functions in 2D Fermi liquids have a nontrivial topological structure. | Session 45: Exotic Collective Excitations and Topology-Driven Dynamics in Quantum Materials |

675 | Collective modes in pumped unconventional superconductors with competing ground states | Eremin, Ilya; Mueller, Marvin; Paul, Indranil; Volkov, Pavel | Motivated by the recent development of terahertz pump-probe experiments, we investigate the short-time dynamics in superconductors with multiple attractive pairing channels and competing nematic order. | Session 45: Exotic Collective Excitations and Topology-Driven Dynamics in Quantum Materials |

676 | Collective modes in narrow electron bands: over-the-band plasmon excitations and unconventional superconductivity in moire graphene | Levitov, Leonid | We will discuss various implications of this interesting behavior. | Session 45: Exotic Collective Excitations and Topology-Driven Dynamics in Quantum Materials |

677 | Band structure and local electronic correlations in triplet superconductor UTe2 | Miao, Lin; Liu, Shouzheng; Xu, Yishuai; Kotta, Erica; Kang, Chang-Jong; Ran, Sheng; Paglione, Johnpierre; Chuang, Yi-De; Kotliar, Gabriel; Butch, Nicholas; Denlinger, Jonathan; Wray, Lewis | I will present high resolution angle resolved photoemission (ARPES) measurements covering multiple planes in the 3D Brillouin zone of UTe 2, revealing distinct Fermi pockets from two light electron bands and one heavy band. | Session 46: Experimental Advances on Newly-Discovered Unconventional Superconductor UTe2 |

678 | Intermediate valence UTe2 under pressure | Thomas, Sean | At the end of the talk I will discuss new insights learned from dilatometry measurements as well as outstanding open questions regarding superconductivity in this material. | Session 46: Experimental Advances on Newly-Discovered Unconventional Superconductor UTe2 |

679 | Point Node Gap Structure of Spin-Triplet Superconductor UTe2 | Metz, Tristin; Bae, Seokjin; Ran, Sheng; Liu, I-Lin; Eo, Yun Suk; Fuhrman, Wesley; Agterberg, Daniel; Anlage, Steven; Butch, Nicholas; Paglione, Johnpierre | Modeling this contribution with a T−1/3 power law allows restoration of the full entropy balance in the superconducting state and a resultant cubic power law for the electronic DOS below Tc, consistent with the point-node gap structure determined by thermal conductivity and penetration depth measurements. | Session 46: Experimental Advances on Newly-Discovered Unconventional Superconductor UTe2 |

680 | Multiple superconducting phases and field-induced phenomena in spin-triplet superconductor UTe2 | Aoki, Dai | We present our recent results on the novel spin-triplet superconductor UTe2, which is at the verge of the ferromagnetic order. | Session 46: Experimental Advances on Newly-Discovered Unconventional Superconductor UTe2 |

681 | Spin-triplet superconducting state in the nearly ferromagnetic compound UTe2 | Ran, Sheng | Even more striking, superconductivity reenters in the magnetic field of 45 tesla and persists up to 65 tesla, which is the upper limit of magnetic field in our current study. | Session 46: Experimental Advances on Newly-Discovered Unconventional Superconductor UTe2 |

682 | Coherent many-body exciton in van der Waals antiferromagnet NiPS3 | Park, Je-Geun | We have found that a rare spin-orbital entangled exciton state appears below T N=150 K in NiPS 3, an antiferromagnetic (AFM) van der Waals (vdW) material. | Session 47: Ferroelectricity and Second Harmonic Generation in 2D systems |

683 | Crystal Structures, Phase Stability, and Electronic Properties of Two Dimensional Ferroelectric MXenes | Li, Mo; Young, Joshua | [1] In this work, Density Functional Theory (DFT) and the Berry Phase approach were used to study both the structures and the ferroelectric properties of additional MXene materials. | Session 47: Ferroelectricity and Second Harmonic Generation in 2D systems |

684 | Optical Second-Harmonic Interference in Two-Dimensional Heterostructures | Kim, Wontaek; Ryu, Sunmin | In this talk, I will present our recent findings on SHG interference occurring in 2D TMD heterostructures. | Session 47: Ferroelectricity and Second Harmonic Generation in 2D systems |

685 | Stacking-engineered ferroelectricity in bilayer boron nitride | Yasuda, Kenji; Wang, Xirui; Watanabe, Kenji; Taniguchi, Takashi; Jarillo-Herrero, Pablo | Here, we demonstrate a general approach to engineering 2D ferroelectrics from a non-ferroelectric parent compound using van der Waals assembly [2]. | Session 47: Ferroelectricity and Second Harmonic Generation in 2D systems |

686 | Tuning Polarization and Electronic Structure via Chemical Substitution in Two Dimensional Ferroelectrics | Young, Joshua; Li, Mo; Omisakin, Olamide | [1] Here, we used density functional theory (DFT) calculations to investigate additional M 2CX 2 materials (M = Sc, Y, La; X = O, F). | Session 47: Ferroelectricity and Second Harmonic Generation in 2D systems |

687 | Theoretical Insights into C-H Bond Activation of Methane by Transition Metal Clusters: The Role of Anharmonic Effects | Bhumla, Preeti; Bhattacharya, Saswata | To incorporate the anharmonicity in the vibrational free energy contribution to the configurational entropy, we evaluate the excess free energy of the clusters numerically by thermodynamic integration method with ab initio molecular dynamics ( aiMD) simulation inputs. | Session 47: Ferroelectricity and Second Harmonic Generation in 2D systems |

688 | The most efficient thickness of Si nano film for high-harmonic generation | Yamada, Shunsuke; Yabana, Kazuhiro | We performed first-principles calculations of high-harmonic generation (HHG) in reflected and transmitted waves from a Si nano film exposed to an intense light pulse. | Session 47: Ferroelectricity and Second Harmonic Generation in 2D systems |

689 | Selective high harmonics generated from a carbon nanotube | Furman, Walter; Reichl, Linda | We obtain a gauge-covariant Hamiltonian for electrons confined to a nanotube surface in the presence of a circularly polarized electromagnetic field. | Session 47: Ferroelectricity and Second Harmonic Generation in 2D systems |

690 | Second Harmonic Generation from a Single Plasmonic Nanorod Strongly Coupled to a WSe2 Monolayer | Li, Chentao; Lu, Xin; Srivastava, Ajit; Storm, S. David; Gelfand, Rachel; Pelton, Matthew; Sukharev, Maxim; Harutyunyan, Hayk | Here we report the first experimental investigation of the nonlinear properties of these strongly-coupled systems, by observing second harmonic generation from a WSe 2 monolayer strongly coupled to a single gold nanorod. | Session 47: Ferroelectricity and Second Harmonic Generation in 2D systems |

691 | Enhanced Tunable Second Harmonic Generation from Twistable Interfaces and Vertical Superlattices in Boron Nitride Homostructures | Yao, Kaiyuan; Finney, Nathan; zhang, jin; Moore, Samuel; Xian, Lede; Tancogne-Dejean, Nicolas; Liu, Fang; Ardelean, Jenny; Xu, Xinyi; Halbertal, Dorri; Watanabe, Kenji; Taniguchi, Takashi; Ochoa, Hector; Asenjo-Garcia, Ana; Zhu, Xiaoyang; Basov, Dmitri; Rubio, Angel; Dean, Cory; Hone, James; Schuck, P. James | Here we report highly tunable second harmonic generation (SHG) from nanomechanically rotatable stacks of bulk hexagonal boron nitride (BN) crystals, and introduce the term twistoptics to describe studies of optical properties in twistable vdW systems. | Session 47: Ferroelectricity and Second Harmonic Generation in 2D systems |

692 | Ferroelectricity in parallel-stacked transition metal dichalcogenides | Wang, Xirui; Yasuda, Kenji; Zhang, Yang; De La Barrera, Sergio; Rhodes, Daniel; Watanabe, Kenji; Taniguchi, Takashi; Hone, James; Fu, Liang; Jarillo-Herrero, Pablo | This method of building ferroelectrics out of non-ferroelectrics can be generalized to other bipartite materials, such as transition metal dichalcogenides (TMDs) [4]. | Session 47: Ferroelectricity and Second Harmonic Generation in 2D systems |

693 | Tunable extra Dirac points in one-dimensional graphene superlattice induced by periodic ferroelectric domains | Li, Tianlin; Chen, Hanying; Wang, Kun; Hao, Yifei; Zhang, Le; Wu, Qiuchen; Hong, Xia | In this work, we investigate the transport signature of one-dimensional (1D) superlattice (SL) in monolayer graphene induced by pre-patterned periodic domains in a ferroelectric bottom gate. | Session 47: Ferroelectricity and Second Harmonic Generation in 2D systems |

694 | Theory of Anomalous Floquet Higher-Order Topology: Classification, Characterization, and Bulk-Boundary Correspondence | Zhang, Ruixing; Yang, Zhicheng | In this work, we provide a general framework to understand anomalous Floquet higher-order topological insulators (AFHOTIs), the classification of which has remained a challenging open question. | Session 48: Floquet Topological Insulators |

695 | Topological Floquet Engineering of Twisted Bilayer Graphene | Topp, Gabriel; Jotzu, Gregor; McIver, James; Xian, Lede; Rubio, Angel; Sentef, Michael | Motivated by the measurement of ultrafast light-induced Hall currents in monolayer graphene [1], we investigate the topological properties of twisted bilayer graphene for an intermediate twisting angle in and out of equilibrium on the basis a full Moiré-unit-cell tight-binding model [2]. | Session 48: Floquet Topological Insulators |

696 | Floquet engineering of twisted double bilayer graphene | Rodriguez-vega, Martin; Vogl, Michael; Fiete, Gregory | We study the effects of circularly polarized light propagating in free space and confined in a waveguide on the band structure and topological properties of twisted double bilayer graphene (TDBG) samples. | Session 48: Floquet Topological Insulators |

697 | Anomalous levitation and annihilation in Floquet topological insulators | Liu, Hui; Fulga, Ion Cosma; Asboth, Janos | Here, we introduce the anomalous levitation and pair annihilation, a process unique to periodically driven, or Floquet, systems. | Session 48: Floquet Topological Insulators |

698 | Bulk Invariants for 2D Floquet Topological Systems | Zhang, Carolyn; Levin, Michael | In this talk, we present a bulk-boundary correspondence for non-interacting and interacting Floquet MBL systems in two spatial dimensions. | Session 48: Floquet Topological Insulators |

699 | Stability of topological edge states in nonlinear quantum walks: Bifurcations unique to Floquet systems | Mochizuki, Ken; Kawakami, Norio; Obuse, Hideaki | Taking these features into account, we study the stability of topologically protected edge states in nonlinear quantum walks. | Session 48: Floquet Topological Insulators |

700 | Floquet topological flat bands and Landau Levels in two-dimensional systems | Tahir, Muhammad; Winblad, Aidan; Chen, Hua | Here, we propose a general approach to realizing Floquet flat bands and Landau levels with nontrivial topology in 2D or quasi-2D systems subject to circularly-polarized light. | Session 48: Floquet Topological Insulators |

701 | Kagome lattice network model as a chiral Floquet topological insulator | Wilczak, Matteo; Efimkin, Dmitry; Kimchi, Itamar; Gurarie, Victor | We describe a band reconstruction procedure which allows us to show that the Dirac electrons in a Kagome geometry end up forming a Chern band. | Session 48: Floquet Topological Insulators |

702 | Adding Doublons to Floquet Topological Insulators | Drueeke, Helena; Bauer, Dieter | We investigate Floquet topology in a tight-binding model on a finite-sized, two-dimensional, square lattice. | Session 48: Floquet Topological Insulators |

703 | Realization of Unidirectional Soliton-like Edge States in Nonlinear Floquet Topological Insulators | Mukherjee, Sebabrata; Rechtsman, Mikael | Here we demonstrate unidirectional soliton-like nonlinear states on the edge of photonic Floquet topological insulators formed by modulated optical waveguides. | Session 48: Floquet Topological Insulators |

704 | Quantum Hall Network Models as Floquet Topological Insulators | Potter, Andrew; Chalker, John; Gurarie, Victor | Network models for equilibrium integer quantum Hall (IQH) transitions are described by unitary scattering matrices that can also be viewed as representing nonequilibrium Floquet systems. | Session 48: Floquet Topological Insulators |

705 | Homotopy classification of Floquet band singularities | Sun, Xiao-Qi; Slager, Robert-Jan; Bzdusek, Tomas | In this work [1], we derive a classification of singularities of quasi-energy bands. | Session 48: Floquet Topological Insulators |

706 | Spacetime symmetry indicator for Floquet topological states | Lu, Shuangyuan; Lu, Yuan-Ming | In this work, we generalize the concept of symmetry indicators from spatial crystalline symmetries to spacetime symmetry in periodically driven Floquet systems. | Session 48: Floquet Topological Insulators |

707 | Floquet Gauge Pump | Kumar, Abhishek; Ortiz, Gerardo; Richerme, Philip; Seradjeh, Babak | We introduce the Floquet gauge pump whereby a dynamically engineered Floquet Hamiltonian is employed to reveal the inherent topology of the ground state in interacting systems. | Session 48: Floquet Topological Insulators |

708 | Driving Quantum-Confined Massless Dirac Fermions: Floquet Graphene Antidot Lattices | Cupo, Andrew; Flynn, Vincent; Cobanera, Emilio; Brown, James; Whitfield, James; Ramanathan, Chandrasekhar; Viola, Lorenza | Driving Quantum-Confined Massless Dirac Fermions: Floquet Graphene Antidot Lattices | Session 48: Floquet Topological Insulators |

709 | Thermal equilibration on the edges of topological liquids | Ma, Kwok Wai; Feldman, Dmitri | We show that at low temperatures the equilibration length diverges as 1/T^2 for almost all Abelian and non-Abelian topological orders. | Session 49: Fractional Quantum Hall Effect |

710 | Vanishing thermal equilibration for hole-conjugate fractional quantum Hall states in graphene | SRIVASTAV, SAURABH; Kumar, Ravi; Spånslätt, Christian; Watanabe, Kenji; Taniguchi, Takashi; Mirlin, Alexander; Gefen, Yuval; Das, Anindya | Here, we report on measurements of both electrical and thermal conductances of integer and fractional quantum Hall (FQH) phases, realized in hBN encapsulated graphite gated bilayer graphene devices. | Session 49: Fractional Quantum Hall Effect |

711 | Probing spin structure of mangeto-roton with Raman scattering | Nguyen, Dung; Son, Dam | We construct a new model for Raman scattering on a fractional Quantum Hall (FQH) state. | Session 49: Fractional Quantum Hall Effect |

712 | The boundary density profile of a Coulomb droplet. Freezing at the edge. | Goulart Cardoso, Gabriel Jose; Stéphan, Jean-Marie; Abanov, Alexandre | Motivated by Laughlin’s plasma analogy, we revisit the problem of computing the boundary density profile of a droplet of two-dimensional one-component plasma (2D OCP) with logarithmic interaction between particles in a confining harmonic potential. | Session 49: Fractional Quantum Hall Effect |

713 | Model wavefunctions for interfaces between lattice Laughlin states | Jaworowski, Blazej; Nielsen, Anne | In this work, we overcome this difficulty by using the conformal field theory to construct model wavefunctions for interfaces between two lattice Laughlin states at different fillings. | Session 49: Fractional Quantum Hall Effect |

714 | Fractional Quantum Hall Effect in Arbitrary Potentials | Hu, Yayun; Ge, Yang; Zhang, Jian-xiao; Jain, Jainendra | We develop numerical methods that allow the treatment of fractional quantum Hall effect (FQHE) systems in arbitrary potentials without rotational symmetry. | Session 49: Fractional Quantum Hall Effect |

715 | Large-scale simulations of PH-Pfaffian trial wave functions | Yutushui, Mykhailo; Mross, David | Large-scale simulations of PH-Pfaffian trial wave functions | Session 49: Fractional Quantum Hall Effect |

716 | Fractional quantum Hall states: Frustration-free parent Hamiltonians and infinite-bond-dimension matrix-product-states | Schossler, Matheus; Bandyopadhyay, Sumanta; Seidel, Alexander | We present the beginnings of a framework for FF Hamiltonians with infinite bond dimensions MPS ground states. | Session 49: Fractional Quantum Hall Effect |

717 | Non-diagonal anisotropic quantum Hall states | Tam, Pok Man; Kane, Charles | We introduce a family of Abelian quantum Hall states termed the non-diagonal states, arising at filling ν = p/2q for bosonic systems and ν = p/(p + 2q) for fermionic systems, with p and q being two coprime integers. | Session 49: Fractional Quantum Hall Effect |

718 | Generalized Streda formula in the adiabatic heuristic principle | Kudo, Koji; Hatsugai, Yasuhiro | Assuming the invariance of the many-body Chern number, we have analytically proved a generalized Streda formula, which explains the wild behavior of the topological degeneracy in terms of the Chern number. | Session 49: Fractional Quantum Hall Effect |

719 | Rotons in Anyon Superfluids | Mehta, Umang; Du, Yi-Hsien; Son, Dam | The effective theory obtained this way contains an infinite tower of fields and is valid well beyond the cut-off for the effective field theory of the Nambu-Goldstone boson. | Session 49: Fractional Quantum Hall Effect |

720 | Fractional Chiral Hinge Insulator | Regnault, Nicolas; Hackenbroich, Anna; Hudomal, Ana; Schuch, Norbert; Bernevig, Andrei | We propose and study a wave function describing an interacting three-dimensional fractional chiral hinge insulator (FCHI) constructed by Gutzwiller projection of two non-interacting second order topological insulators with chiral hinge modes at half filling. | Session 49: Fractional Quantum Hall Effect |

721 | Induced superconductivity in a fractional quantum Hall edge | Ronen, Yuval; Gul, Onder; Lee, Si Young; Shapourian, Hassan; Zauberman, Jonathan; Lee, Young-Hee; Watanabe, Kenji; Taniguchi, Takashi; Vishwanath, Ashvin; Yacoby, Amir; Kim, Philip | In this talk, I will introduce high-quality graphene-based van der Waals devices with narrow superconducting electrode (NbN), in which superconductivity and robust FQHE coexist. | Session 49: Fractional Quantum Hall Effect |

722 | Extraction of many-body Chern number from a single wave function | Dehghani, Hossein; Cian, ZePei; Hafezi, Mohammad; Barkeshli, Maissam | In this paper, we demonstrate how to extract the Chern number given a single many-body wave function, without knowledge of the Hamiltonian. | Session 49: Fractional Quantum Hall Effect |

723 | The origin of multiple clustering behaviors in superconformal minimal models | Hu, Yichen; Teo, Jeffrey C. Y. | In this work, we investigate wavefunctions of topological phases corresponding to the N=1 superconformal minimal model type. | Session 49: Fractional Quantum Hall Effect |

724 | Hidden quantum Hall stripes in AlxGa1-xAs/Al0.24Ga0.76As quantum wells | Fu, Xiaojun; Huang, Yi; Shklovskii, Boris; Zudov, Michael; Gardner, Geoff; Manfra, Michael | We report on transport signatures of hidden quantum Hall stripe (hQHS) phases in high (N > 2) half-filled Landau levels of Al xGa 1−xAs/Al 0.24Ga 0.76As quantum wells with varying Al mole fraction x < 10 −3. | Session 50: Fractional Quantum Hall Effect: Bubbles, Stripes, and More |

725 | Noise spectrum measurements in reentrant integer quantum Hall states | Sun, Jian; Niu, Jiasen; Li, Yifan; Liu, Yang; Pfeiffer, Loren; West, Ken; Wang, Pengjie; Lin, Xi | By performing noise spectrum measurements in a GaAs/AlGaAs 2DEG sample, we observed field-driven noise spectra in RIQH states including broad-band and narrow-band noise. | Session 50: Fractional Quantum Hall Effect: Bubbles, Stripes, and More |

726 | Thermal and Quantum Melting Phase Diagrams for a Magnetic-Field-Induced Wigner Solid | Ma, Meng; Villegas-Rosales, K. A.; Deng, Hao; Chung, Edwin Yoonjang; Pfeiffer, Loren; West, Ken; Baldwin, Kirk; Winkler, Roland; Shayegan, Mansour | Here we report our measurements [1], using a newly developed technique which probes the melting of the WS via its screening efficiency, of the fundamental temperature vs. filling phase diagram for the 2D holes’ WS-liquid thermal melting. | Session 50: Fractional Quantum Hall Effect: Bubbles, Stripes, and More |

727 | Screening properties of bubble phases in excited Landau levels | Villegas Rosales, Kevin; Kumar Singh, Siddharth; Deng, Hao; Baldwin, Kirk; West, Ken; Pfeiffer, Loren; Shayegan, Mansour | By employing a capacitance technique and using very high-quality GaAs 2D electron systems, we report an unexplored bulk property of the bubble phases, namely, their screening efficiency, measured as their response to a perpendicular electric field. | Session 50: Fractional Quantum Hall Effect: Bubbles, Stripes, and More |

728 | Spontaneous ferromagnetism in a dilute 2D electron system | Hossain, Md. Shafayat; Ma, Meng; Villegas Rosales, Kevin; Chung, Edwin Yoonjang; Pfeiffer, Loren; West, Ken; Baldwin, Kirk; Shayegan, Mansour | Remarkably, with the application of a perpendicular magnetic field, we observe clear signatures of a fractional quantum Hall state at filling factor v = 1/3 at r s as large as 38. | Session 50: Fractional Quantum Hall Effect: Bubbles, Stripes, and More |

729 | Record-quality two-dimensional electron systems | Chung, Edwin Yoonjang; Villegas-Rosales, K. A.; Baldwin, Kirk; Madathil, P. T.; West, Ken; Shayegan, Mansour; Pfeiffer, Loren | We present our recent results on the growth of record-quality GaAs quantum wells via molecular beam epitaxy (MBE). | Session 50: Fractional Quantum Hall Effect: Bubbles, Stripes, and More |

730 | Dependence of the fractional quantum Hall effect energy gap on electron layer thickness | Thekke Madathil, Pranav; Villegas-Rosales, K. A.; Chung, Edwin Yoonjang; Pfeiffer, Loren; West, Ken; Baldwin, Kirk; Shayegan, Mansour | We present a Δ vs. layer thickness plot and contrast it to different theoretical calculations [2,3]. | Session 50: Fractional Quantum Hall Effect: Bubbles, Stripes, and More |

731 | Stability of Multielectron Bubble Phases in High Landau Levels | Ro, Dohyung; Myers, Sean; Deng, Nianpei; Watson, John; Manfra, Michael; Pfeiffer, Loren; West, Ken; Csathy, Gabor | Here, we investigate temperature evolution of magnetotransport of the reentrant states in the N=3 Landau level and discuss the stability of multielectron bubble phases in the N=2 and N=3 Landau levels. | Session 50: Fractional Quantum Hall Effect: Bubbles, Stripes, and More |

732 | Competition between fractional quantum Hall liquid and Wigner solid at small fillings: Role of layer thickness and Landau level mixing | Singh, Siddharth Kumar; Villegas-Rosales, K. A.; Ma, Meng; Hossain, Md. Shafayat; Chung, Edwin Yoonjang; Pfeiffer, Loren; West, Ken; Baldwin, Kirk; Shayegan, Mansour | Here we report magneto-transport data for a new 2D electron system where the electrons are confined to an AlAs quantum well. | Session 50: Fractional Quantum Hall Effect: Bubbles, Stripes, and More |

733 | Magnetotransport patterns of the nu=1 integer quantum Hall state in a high mobility two-dimensional electron gas | Myers, Sean; Huang, Haoyun; Pfeiffer, Loren; West, Ken; Csathy, Gabor | In a sample belonging to the newest generation having record high mobilities, we observe a pattern of structures in the magnetotransport near the integer quantum Hall state at the filling factor nu = 1. | Session 50: Fractional Quantum Hall Effect: Bubbles, Stripes, and More |

734 | Fractional statistics in anyon collisions | BARTOLOMEI, hugo; Kumar, manohar; Bisognin, Remi; Marguerite, Arthur; Berroir, Jean-Marc; Bocquillon, Erwann; Placais, bernard; Cavanna, Antonella; Gennser, Ulf; jin, yong; Fève, Gwendal | We experimentally demonstrate Abelian fractional statistics at filling factor ν = 1/3 by measuring the current correlations resulting from the collision between anyons at a beamsplitter [3]. | Session 51: Fractional Quantum Hall Effect: Quasiparticle Excitations |

735 | Microwave photons emitted by fractionally charged quasiparticles | Bisognin, Remi; Bartoloemi, Hugo; Kumar, Manohar; Safi, Inès; Berroir, Jean-Marc; Bocquillon, Erwan; Placais, bernard; Cavanna, Antonella; Gennser, Ulf; jin, yong; Fève, Gwendal | Microwave photons emitted by fractionally charged quasiparticles | Session 51: Fractional Quantum Hall Effect: Quasiparticle Excitations |

736 | Valley-controlled even-denominator fractional quantum Hall effect in bilayer graphene | Huang, Ke; Fu, Hailong; Watanabe, Kenji; Taniguchi, Takashi; Lin, Xi; Zhu, Jun | Here we report the observation of a new even-denominator state at filling factor ν = 5/2 in bilayer graphene. | Session 51: Fractional Quantum Hall Effect: Quasiparticle Excitations |

737 | Topological Interface between Pfaffian and anti-Pfaffian Order in $\nu=5/2$ Quantum Hall Effect | Zhu, Wei; Sheng, Donna; Yang, Kun | We demonstrate an intrinsic electric dipole moment emerges at the interface, similar to the “p-n" junction sandwiched between N-type and P-type semiconductor. | Session 51: Fractional Quantum Hall Effect: Quasiparticle Excitations |

738 | Paired Electron Additions to Fractional Quantum Hall Edge States in Large GaAs Quantum Dots | Aronson, Samuel; Demir, Ahmet; Staley, Neal; Tomarken, Spencer; West, Ken; Baldwin, Kirk; Pfeiffer, Loren; Ashoori, Raymond | Using single electron capacitance spectroscopy, we determine the energies required to add single electrons to a large (0.8 μm) 2D GaAs quantum dot. | Session 51: Fractional Quantum Hall Effect: Quasiparticle Excitations |

739 | Precise experimental test of the Luttinger theorem and particle-hole symmetry in composite fermions | Hossain, Md. Shafayat; Mueed, M A; Ma, Meng; Villegas Rosales, Kevin; Chung, Edwin Yoonjang; Pfeiffer, Loren; West, Ken; Baldwin, Kirk; Shayegan, Mansour | We study a strongly interacting, flat-band system of composite fermions (CFs) in the half-filled lowest Landau level ( v = ½), employing a geometric resonance technique. | Session 51: Fractional Quantum Hall Effect: Quasiparticle Excitations |

740 | Time, momentum, and energy resolved pump probe tunneling spectroscopy of the nonequilibrium electrons in a Landau level (part 1). | Ashoori, Raymond; Yoo, Heun Mo; Baldwin, Kirk; West, Ken; Pfeiffer, Loren | In this talk, I will discuss the operational principle of Tr-MERTS and describe basic transient features observed in a quantum Hall system. | Session 51: Fractional Quantum Hall Effect: Quasiparticle Excitations |

741 | Intertwined order in fractional Chern insulators from finite-momentum pairing of composite fermions | Sohal, Ramanjit; Fradkin, Eduardo | We investigate the problem of intertwined orders in fractional Chern insulators by considering lattice fractional quantum Hall (FQH) states arising from pairing of composite fermions in the square-lattice Hofstadter model. | Session 51: Fractional Quantum Hall Effect: Quasiparticle Excitations |

742 | Composite-fermion Fermi surface at the half-filled Landau level with 2n-fold rotational symmetry | Kumar, Prashant; Bhatt, Ravindra | In this work, we look at its response to anisotropic electron-electron interactions of various types with 2n-fold rotational symmetry. | Session 51: Fractional Quantum Hall Effect: Quasiparticle Excitations |

743 | Bardeen-Cooper-Schrieffer pairing of composite fermions | Sharma, Anirban; Pu, Songyang; Jain, Jainendra | We investigate the problem by constructing a p-wave paired BCS wave function of composite fermions [3] on torus geometry and minimizing the energy as a function of the gap parameter. | Session 51: Fractional Quantum Hall Effect: Quasiparticle Excitations |

744 | Hall viscosity of the composite-fermion Fermi seas for fermions and bosons | Pu, Songyang | This paper reports on the Hall viscosities of composite-fermion Fermi seas at $\nu=1/m$, where $m$ is even for fermions and odd for bosons. | Session 51: Fractional Quantum Hall Effect: Quasiparticle Excitations |

745 | Observation of anyonic statistics through quantum Hall interferometry | Nakamura, James; Liang, Shuang; Gardner, Geoff; Manfra, Michael | We present measurements of interference at the ν = 1/3 fractional quantum Hall state. | Session 51: Fractional Quantum Hall Effect: Quasiparticle Excitations |

746 | Entanglement Negativity and Topological Degeneracy | Lim, Pak Kau; Asasi, Hamed; Teo, Jeffrey C. Y.; Mulligan, Michael | We study the spatial distribution of entanglement in (2+1)d topological phases. | Session 51: Fractional Quantum Hall Effect: Quasiparticle Excitations |

747 | Time, momentum, energy resolved pump probe tunneling spectroscopy of the nonequilibrium electrons in a Landau level (part2) | Yoo, Heun Mo; West, Ken; Baldwin, Kirk; Pfeiffer, Loren; Ashoori, Raymond | We use time, momentum, and energy resolved pump probe tunneling spectroscopy (Tr-MERTS) to study the nonequilibrium electronic states in a quantum Hall system. | Session 51: Fractional Quantum Hall Effect: Quasiparticle Excitations |

748 | Non-Abelian properties at 5/2 and 7/2 filling factors exposed using controlled e/4 population of Fabry-Perot interferometers. | Willett, Robert; Shtengel, Kirill; Nayak, Chetan; Pfeiffer, Loren; Baldwin, Kirk; West, Ken | The small central gate adjustment of e/4 number is a new experimental method: here we show our progress in this effort. | Session 51: Fractional Quantum Hall Effect: Quasiparticle Excitations |

749 | Q-Valley Quasiparticle Interference in Few-Layer Transition Metal Dichalcogenides | Cheung, Patrick; Zhou, Yan-Feng; Zhang, Fan | We study the quasiparticle interference (QPI) due to Q-valley electrons scattering off localized impurities, which modifies the local density of states. | Session 52: Fundamental Physics Using 2D Systems |

750 | Heavy-Fermion Physics in a Transition Metal Dichalcogenide Moiré Heterostructure | Kumar, Ajesh; Hu, Naichao; Potter, Andrew; MacDonald, Allan | We propose a realization of heavy-fermion physics in suitably-designed trilayer transition metal dichalcogenide heterostructures, which enable gate-tuning across the heavy-fermion critical point in a single device. | Session 52: Fundamental Physics Using 2D Systems |

751 | Flavor Quantum Dots and Artificial Quark Model in Transition Metal Dichalcogenides | Zheng, Peng Peng; Bao, Zhi-qiang; Cheung, Patrick; Zhang, Fan | We show that the triply degenerate Q valleys in few-layer transition metal dichalcogenides provide a unique platform for exploring the rare flavor SU(3) symmetry in quantum dot geometry. | Session 52: Fundamental Physics Using 2D Systems |

752 | Nematic superconducting state promoted by electromagnetic gauge field fluctuations | Gali, Virginia; Fernandes, Rafael | Motivated by the recent observation of nematic superconductivity in twisted bilayer graphene (TBG), we present a theory for the pairing state symmetry of two-component p-wave and d-wave unconventional superconductors on the triangular lattice. | Session 52: Fundamental Physics Using 2D Systems |

753 | Universal Scaling for Electron Transmission in Nearly Ballistic And Quantum Dragon Nanodevices | Novotny, Mark; Novotny, Tomas | We study via a tight-binding model two types of devices that have T(E)=1 for all energies that propagate through the attached leads. | Session 52: Fundamental Physics Using 2D Systems |

754 | A DMRG study of the extended Hubbard model on the triangular lattice | Zhou, Yiqing; Sheng, Donna; Kim, Eun-Ah | Inspired by this experiment, we explore the charge order phenomena of the extended Hubbard model on the triangular lattice using the density matrix renormalization group (DMRG). | Session 52: Fundamental Physics Using 2D Systems |

755 | Non-local interactions in transition metal dichalcogenide heterobilayer moiré superlattices | Morales-Durán, Nicolás; Potasz, Pawel; MacDonald, Allan | We discuss the influence of this difference on the metal-insulator phase transition and on magnetic insulating states at half-filling, by means of an exact diagonalization study of the electronic properties of narrow moiré bands. | Session 52: Fundamental Physics Using 2D Systems |

756 | Electronic compressibility study of transition metal dichalcogenide moiré superlattices | Li, Tingxin; Zhu, Jiacheng; Shan, Jie; Mak, Kin Fai | In this talk, we will present electronic compressibility study of TMD heterobilayer moiré superlattices. | Session 52: Fundamental Physics Using 2D Systems |

757 | Order to Disorder in Quasiperiodic Systems | morison, david; Murphy, Benjamin; Cherkaev, Elena; Golden, Kenneth | Here we introduce a class of quasiperiodic media with novel macroscopic behavior. | Session 52: Fundamental Physics Using 2D Systems |

758 | Realizing the Kondo lattice Model in Electron Doped Heterogeneous TMD Bilayers | dalal, amir; Fernandes, Rafael; Ruhman, Jonathan | Thus, we propose the possible simulation of a Kondo lattice model and unconventional magnets in moire superlattices based on TMDs. | Session 52: Fundamental Physics Using 2D Systems |

759 | Generalized Wigner crystallization in moiré materials | Padhi, Bikash; Ramasubramanian, Chitra; Phillips, Philip | In this article, we investigate the general problem of Wigner crystallization in the presence of an underlying (moiré) lattice. | Session 52: Fundamental Physics Using 2D Systems |

760 | Spectroscopy of Mn12 with modified ligands on graphene bolometers | St. Marie, Luke; Havlicek, Lubomir; Hruby, Jakub; Henry, Davonne; Sojka, Antonin; Navarro, Jorge; Myers-Ward, Rachael; El Fatimy, Abdel; Liu, Amy; Gaskill, David; Nemec, Ivan; Neugebauer, Petr; Barbara, Paola | By combining SMMs with graphene, we can create hybrid materials with emergent properties that give them even greater potential. | Session 52: Fundamental Physics Using 2D Systems |

761 | Tunable Klein tunneling using Spin orbit coupling in a 2D EG | Rogowski, Travis; Gumbs, Godfrey; Iurov, Andrii; Huang, Danhong | We employ this result for the tunneling probability in the Landauer-Buttiker formula to calculate the ballistic conductivity. | Session 52: Fundamental Physics Using 2D Systems |

762 | Coherent Lattice Wobbling and Dynamic Breaking of Friedel’s Law Observed by Ultrafast Electron Diffraction | Qian, Qingkai; Shen, Xiaozhe; Luo, Duan; Wang, Xijie; Huang, Shengxi | Coherent Lattice Wobbling and Dynamic Breaking of Friedel’s Law Observed by Ultrafast Electron Diffraction | Session 52: Fundamental Physics Using 2D Systems |

763 | Tuning the electronic state in uranium based strongly correlated electron materials | Baumbach, Ryan | In this talk we will present results for several chemical substitution studies in URu 2Si 2, with a focus on bulk thermodynamic and electrical transport measurements and the influence of high magnetic fields and applied pressure. | Session 53: Fundamental Problems in Strongly Correlated U-Based Materials |

764 | Identifying multi-component superconductivity with resonant ultrasound spectroscopyIdentifying multi-component superconductivity with resonant ultrasound spectroscopy | Ramshaw, Brad; Ghosh, Sayak; Theuss, Florian; Shekhter, Arkady; Jerzembeck, Fabian; Kikugawa, Naoki; Sokolov, Dmitry; Brando, Manuel; Hicks, Clifford; Mackenzie, Andrew; Paglione, Johnpierre; Butch, Nicholas; Ran, Sheng | Using RUS we have discovered that Sr 2RuO 4 has a two-component order parameter, even though recent NMR measurements rule out the px+ipy state. | Session 53: Fundamental Problems in Strongly Correlated U-Based Materials |

765 | Topology and Correlations in Actinide Materials | Ronning, Filip | Using U 3Ru 4Al 12 and field angle rotation studies we illustrate that the Berry curvature is highly tunable in these actinide materials. | Session 53: Fundamental Problems in Strongly Correlated U-Based Materials |

766 | The dual nature of f electrons in the UM2Si2 family with M=Fe, Pd, Ru, and Ni studied with x-ray spectroscopy | Severing, Andrea; Amorese, Andrea; Sundermann, Martin; Haverkort, Maurits; Huang, Yingkai; Szlawska, Maria; Kaczorowski, Dariusz; Ran, Sheng; Maple, M Brian; Bauer, Eric; Leithe-Jasper, Andreas; Hansmann, Philipp; Tjeng, Liu | We have determined the degree of the 5 f-electron localization (HAXPES [3]) as well as the symmetry of the 5f ground state wave function (NIXS [4] across these very different compounds. | Session 53: Fundamental Problems in Strongly Correlated U-Based Materials |

767 | The spin-triplet topological superconductor UTe2 | Butch, Nicholas | The spin-triplet topological superconductor UTe2 | Session 53: Fundamental Problems in Strongly Correlated U-Based Materials |

768 | Richard L. Greene Dissertation Award in Experimental Condensed Matter or Materials Physics (2020): Beyond-Classical Quantum Computation at Google-AI Quantum | Mi, Xiao | As an example, I will present preliminary experimental results on using Sycamore to study the physics of scrambling and thermalization in quantum circuits that are challenging to analyze or simulate classically [2]. | Session 54: Greene Dissertation Award Session |

769 | Richard L. Greene Dissertation Award in Experimental Condensed Matter or Materials Physics (2020): Probing Chiral Excitations with Raman Scattering | Kung, Hsiang-Hsi | Here, we use polarization-resolved Raman scattering to directly probe the collective modes with the symmetry of a pseudovector. | Session 54: Greene Dissertation Award Session |

770 | Richard L. Greene Dissertation Award in Experimental Condensed Matter or Materials Physics: Discovery of magnetic Weyl semimetals and topological chiral crystals | Belopolski, Ilya | In this talk, I will discuss two fundamental strategies, using intrinsic magnetic order and structural crystalline chirality, which we have recently developed to uncover exotic quantum materials dominated by robust topological electronic states. | Session 54: Greene Dissertation Award Session |

771 | Richard L. Greene Dissertation Award in Experimental Condensed Matter or Materials Physics: Imaging electronic wavefunctions and interactions on the surface of bismuth | Randeria, Mallika | In this talk, I will discuss scanning tunneling microscope experiments that explore the role of electron-electron interactions and their tunability on the surface of bismuth. | Session 54: Greene Dissertation Award Session |

772 | Richard L. Greene Dissertation Award in Experimental Condensed Matter or Materials Physics (2020): Delafossite Oxides: natural, ultra-pure metal-insulator heterostructures | Sunko, Veronika | Concentrating on the Rashba-like surface states and the metal/Mott insulator heterostructure, I will show how the simplicity of the materials allows us to pinpoint to the underlying cause for the remarkable electronic behaviour, and in turn to use delafossites as model systems to understand complex phenomena. | Session 54: Greene Dissertation Award Session |

773 | Quantum spin Hall edge states in twisted bilayer 1T’-WTe2 | Waters, Dacen; Lüpke, Felix; Pham, Anh; Yan, Jiaqiang; Mandrus, David; Ganesh, Panchapakesan; Hunt, Benjamin | In this work, we use scanning tunneling microscopy and spectroscopy (STM/STS), to study the QSH edge state in WTe 2 bilayers for three different twist angles. | Session 55: Hall Effects in 2D Systems |

774 | Giant nonlinear Hall effect in strained twisted bilayer graphene | Zhang, Cheng-Ping; Xiao, Jiewen; Benjamin, ZHOU; Hu, Jinxin; Xie, Yingming; Yan, Binghai; Law, Kam Tuen | In this work, we show that the large Berry curvatures in the moire bands lead to strong nonlinear Hall(NLH) effect in a strained TBG with general filling factors. | Session 55: Hall Effects in 2D Systems |

775 | Quantum anomalous Hall effect in two-dimensional Cu-dicyanobenzene coloring-triangle lattice | Gao, Yixuan; Zhang, Yu-Yang; Sun, Jiatao; Zhang, Lizhi; Zhang, Shengbai; Du, Shixuan | Here, based on first-principles calculations, we predict an organometallic CT lattice, Cu-dicyanobenzene (DCB), to be a stable QAH insulator. | Session 55: Hall Effects in 2D Systems |

776 | Anomalous Hall Effect in Ultrathin Crystalline Strontium Ruthenate Membranes | Blah, Patrick; Lesne, Edouard; Lee, Martin; Monteiro, Ana; Afanasiev, Dmytro; van Thiel, Thierry; Matthiesen, Mattias; Hortensius, Jorrit; Filippozzi, Ulderico; Huang, Yingkai; Steeneken, Peter; Caviglia, Andrea | We systematically investigate the temperature dependence of the anomalous Hall effect within SRO membranes of varying thicknesses. | Session 55: Hall Effects in 2D Systems |

777 | Quantum Hall crystals, liquids, and bubbles in graphene from direct measurement of the chemical potential | Yang, Fangyuan; Zibrov, Alexander; Bai, Ruiheng; Saito, Yu; Liu, Xiaoxue; Taniguchi, Takashi; Watanabe, Kenji; Li, Jia; Goerbig, Mark; Zaletel, Michael; Young, Andrea | We describe an experimental technique to measure the chemical potential in atomically thin layered materials with high sensitivity and in the static limit. | Session 55: Hall Effects in 2D Systems |

778 | Evidence for non-abelian spin-singlet state in graphene quantum Hall bilayer | Zeng, Yihang; Dean, Cory | Here we discuss measurements of the 4/3 state In double-layer graphene, consisting of two graphene monolayers separated by an interlay dielectric, where the layer degree of freedom plays the role of pseudo spin. | Session 55: Hall Effects in 2D Systems |

779 | Edge Channels of Broken Symmetry Quantum Hall States in Graphene probed by Atomic Force Microscopy | Kim, Sungmin; Schwenk, Johannes; Walkup, Daniel; Zeng, Yihang; Ghahari Kermani, Fereshte; Le, Son; Slot, Marlou; Berwanger, Julian; Blankenship, Steven; Watanabe, Kenji; Taniguchi, Takashi; Giessibl, Franz; Zhitenev, Nikolai; Dean, Cory; Stroscio, Joseph | In this talk, we present a microscopic study a of the QH edge states originating from the broken symmetry states of zeroth LL in graphene using AFM. | Session 55: Hall Effects in 2D Systems |

780 | Strange metal behavior of the Hall angle in twisted bilayer graphene | Tuchfeld, Zachary; Lyu, Rui; Verma, Nishchhal; Tian, Haidong; Watanabe, Kenji; Taniguchi, Takashi; Lau, Jeanie; Randeria, Mohit; Bockrath, Marc | Here we discuss combined temperature-dependent transport measurements of both the longitudinal and Hall resistivities in close to magic-angle TBG. | Session 55: Hall Effects in 2D Systems |

781 | Trigonal Warping and anomalous valley-Hall conductivity in twisted double bilayer graphene | Mohan, Priyanka; Ghorai, Unmesh; Sensarma, Rajdeep | We calculate the topological phase diagrams of both ABAB and ABBA stacked twisted double bilayer graphene as a function of both twist angles and perpendicular potential. | Session 55: Hall Effects in 2D Systems |

782 | Anomalous Quantum Hall States in Bilayer Graphene | Su, Jung-Jung; Lau, Chun Ning; MacDonald, Allan | We have explored how coupling of orbital magnetization to external B fields is manifested in the dependence of ground state properties on weak gate Vg and magnetic fields B that favor particular states. | Session 55: Hall Effects in 2D Systems |

783 | Anomalous Hydrodynamic Flow in Interacting Noncentrosymmetric Metals | Toshio, Riki; Takasan, Kazuaki; Kawakami, Norio | In this work [1], we propose a hydrodynamic theory for noncentrosymmetric metals, where a novel class of electron fluids is realized by lowering crystal symmetries and the resulting geometrical effects. | Session 55: Hall Effects in 2D Systems |

784 | Scanning tunneling spectroscopy of quantum Hall ferromagnetic states in graphene | Liu, Xiaomeng; Chiu, Cheng Li; Farahi, Gelareh; Watanabe, Kenji; Taniguchi, Takashi; Zaletel, Michael; Yazdani, Ali | In this work, employing scanning tunneling microscope, we measure tunneling spectrum as a function of electron filling. | Session 55: Hall Effects in 2D Systems |

785 | Spectroscopic imaging of graphene in the quantum hall regime with the scanning tunneling microscope | Farahi, Gelareh; Liu, Xiaomeng; Chiu, Cheng Li; Zaletel, Michael; Yazdani, Ali | We aim at extending such spectroscopic imaging techniques to graphene in the quantum Hall limit, by measuring its local density of states as we tune the carrier density with electrostatic gating. | Session 55: Hall Effects in 2D Systems |

786 | Electric field induced anomalous Hall effects and nematic phases in carrier doped rhombohedral trilayer graphene | Park, Youngju; MacDonald, Allan; Jung, Jeil | We show by means of mean field Hartree-Fock calculations with long-range Coulomb interactions that the energetically favored ground state for ABC trilayer graphene turns from the layer antiferromagetic (LAF) phase to the valley polarized anomalous Hall (AH) phase upon a small carrier doping and application of a perpendicular electric field. | Session 55: Hall Effects in 2D Systems |

787 | Intrinsic anomalous Hall conductivity in non-uniform electric field | Kozii, Vladyslav; Avdoshkin, Aleksandr; Zhong, Shudan; Moore, Joel | We study how the intrinsic anomalous Hall conductivity is modified in two-dimensional crystals with broken time-reversal symmetry due to weak inhomogeneity of the applied electric field. | Session 55: Hall Effects in 2D Systems |

788 | Bypassing the computational bottleneck of quantum-embedding theories for strong electron correlations with machine learning | Rogers, John; Lee, Tsung-Han; Pakdel, Sahar; Xu, Wenhu; Dobrosavljevic, Vladimir; Yao, Yongxin; Christiansen, Ove; Lanata, Nicola | We perform benchmark calculations of a series of actinide systems, where our method describes accurately the correlation effects, reducing by orders of magnitude the computational cost. | Session 56: Heavy Fermion Actinide Metals and Superconductors |

789 | Landau-Ginzburg Theory of Tetragonal Hastatic Order: Application to URu2Si2 | Kornjaca, Milan; Flint, Rebecca | We revisit the hastatic order proposal of spinorial hybridization within Landau-Ginzburg theory. | Session 56: Heavy Fermion Actinide Metals and Superconductors |

790 | Origin of gaplike behaviors in URu2Si2: Combined study via quasiparticle scattering spectroscopy and resistivity measurements | Zhang, Shengzhi; Chappell, Greta; Pouse, Naveen; Baumbach, Ryan; Maple, M Brian; Greene, Laura H; Park, Wan Kyu | We will show that the hybridization gap observed via quasiparticle scattering spectroscopy shows minimal change upon crossing the phase boundary in the entire phase space of URu 2Si 2-xP x and URu 2-yFe ySi 2 [1,2,3]. | Session 56: Heavy Fermion Actinide Metals and Superconductors |

791 | An Anisotropic Enhancement of Spin Orbit Coupling in the Underscreened Anderson Lattice Model | Riseborough, Peter; Yuan, Xiao | The underscreened Anderson Lattice Model describes the uranium monochalcogenides, US, USe and UTe which at high temperatures, the Curie susceptibility show large magnetic moments, and the resistivities show lograithmic temperature variations indicative of a Kondo Effect. | Session 56: Heavy Fermion Actinide Metals and Superconductors |

792 | Electronic structure of ferromagnetic superconductor UGe2 in comparison to UTe2 | Denlinger, Jonathan; Allen, James; Huxley, Andrew; Flouquet, Jacques | Electronic structure of ferromagnetic superconductor UGe2 in comparison to UTe2 | Session 56: Heavy Fermion Actinide Metals and Superconductors |

793 | Thermal expansion and magnetostriction of UTe2 | Willa, Kristin; Hardy, Frederic; Knebel, Georg; Li, Dexin; Knafo, William; Aoki, Dai; Flouquet, Jacques; Meingast, Christoph; Lapertot, Gerard | Thermal expansion and magnetostriction of UTe2 | Session 56: Heavy Fermion Actinide Metals and Superconductors |

794 | Resonant Ultrasound Studies on the Time-Reversal Symmetry Breaking Superconductor Candidate UTe2 | Theuss, Florian; Grissonnanche, Gael; Ran, Sheng; Paglione, Johnpierre; Butch, Nicholas; Ramshaw, Brad | We investigate the possibility of two superconducting transitions with resonant ultrasound spectroscopy and look into what this can tell us about two-component order parameters. | Session 56: Heavy Fermion Actinide Metals and Superconductors |

795 | Itinerant spin fluctuations in antiferromagnetic heavy-fermion system U2Zn17 | Wang, Yishu; Park, Hyowon; Pajerowski, Daniel; Savici, Andrei; Rodriguez-Rivera, Jose; Fisk, Zachary; Broholm, Collin | We report an inelastic neutron scattering investigation of the heavy-fermion system U 2Zn 17. | Session 56: Heavy Fermion Actinide Metals and Superconductors |

796 | Quantum Critical Behavior in the Disordered Itinerant Ferromagnet UCo1-xFexGe | Lee, Sangyun; Bauer, Eric; Ronning, Filip; Thompson, Joe; Rosa, Priscila; Movshovich, Roman | We have investigated low-temperature specific heat of UCo 1-xFe xGe with x spanning a narrow region around concentration x = 0.22 and x = 0.23 of the purported ferromagnetic quantum phase transition (QPT), at temperatures from 60 mK to 2 K and in magnetic field up to 9 T. | Session 56: Heavy Fermion Actinide Metals and Superconductors |

797 | Magnetic Confinement of Spin-Triplet Superconductivity | Lin, Wen-Chen; Campbell, Daniel; Ran, Sheng; Liu, I-Lin; Kim, Hyunsoo; Nevidomskyy, Andriy; Graf, David; Butch, Nicholas; Paglione, Johnpierre | In this work, we track the field-induced first-order transition between superconducting and magnetic field-polarized phases as a function of applied pressure, showing suppression of the transition with increasing pressure until the demise of superconductivity near 16kbar and the appearance of a pressure-induced ferromagnetic-like ground state that is distinct from the field-polarized phase and stable at zero field. | Session 56: Heavy Fermion Actinide Metals and Superconductors |

798 | Spin susceptibility in the superconducting state of UTe2 probed with 125Te-NMR | Ishida, Kenji; Nakamine, Genki; Kitagawa, Shunsaku; Kinjo, Katsuki; Tokunaga, Yo; Sakai, Hironori; Kambe, Shinsaku; Nakamura, Ai; Shimizu, Yusei; Homma, Yoshiya; Li, Dexin; Honda, Fuminori; Aoki, Dai | We discuss the possible d-vector state within the spin-triplet scenario and suggest that the dominant d-vector component for the case of H || b changes above 13 T, where T c increases with increasing H. | Session 56: Heavy Fermion Actinide Metals and Superconductors |

799 | An Optical Investigation of the normal state of UTe2 | Mekonen, Sirak; Kang, Chang-Jong; Chaudhuri, Dipanjan; Barbalas, David; Ran, Sheng; Kotliar, Gabriel; Butch, Nicholas; Armitage, Peter | Here, we have studied the optical properties of the normal state of UTe 2 at frequencies between 10cm -1 and 8500 cm -1 and temperatures between 5 and 290 K using conventional Fourier Transform Infrared Reflectivity. | Session 56: Heavy Fermion Actinide Metals and Superconductors |

800 | Electronic tuning in URu2Si2 through Ru to Pt chemical substitution | Chappell, Greta; Nelson, William; Graf, David; Baumbach, Ryan | We will present thermodynamic and electrical transport measurements for this series and discuss the notable similarities to other phase diagrams. | Session 56: Heavy Fermion Actinide Metals and Superconductors |

801 | Revisiting the properties of the heavy-fermion superconductor UBe13 via polycrystalline samples | Kozelj, Primoz; Juckel, Martin; Stockert, Ulrike; König, Markus; Leithe-Jasper, Andreas; Grin, Yuri; Hassinger, Elena; Svanidze, Eteri | This contribution will present an alternative way in which polycrystalline samples can be used to gain insight into the intrinsic properties of UBe 13. | Session 56: Heavy Fermion Actinide Metals and Superconductors |

802 | Probing electronic anisotropy in the normal state of UTe2 | Eo, Yun Suk; Kim, Hyunsoo; Ran, Sheng; Horn, Jarryd; Hodovanets, Halyna; Saha, Shanta; Collini, John; Fuhrman, Wesley; Nevidomskyy, Andriy; Butch, Nicholas; Fuhrer, Michael; Paglione, Johnpierre | We study the temperature dependence and the magnetic field dependence of electrical resistivity for currents directed along all crystallographic axes in the normal state of the spin-triplet superconductor UTe 2. | Session 56: Heavy Fermion Actinide Metals and Superconductors |

803 | Luttinger count and spin fractionalization in SU(N) invariant Kondo Hamiltonians | Hazra, Tamaghna; Coleman, Piers | A non-perturbative proof of the Luttinger count for the SU(2) Kondo lattice model was provided by Oshikawa [1]. | Session 57: Heavy Fermions and Kondo Interactions |

804 | Critical destruction of the Kondo effect in a particle-hole asymmetric Bose-Fermi Anderson model | Kandala, Ananth; Hu, Haoyu; Si, Qimiao; Ingersent, Kevin | Here we present calculations for r > ½ using a quantum Monte Carlo method for both the spin-isotropic and Ising-anisotropic cases, and the numerical renormalization-group method for Ising anisotropy. | Session 57: Heavy Fermions and Kondo Interactions |

805 | Theory of a Strange Metal at the Breakdown of a Heavy Fermi Liquid | Aldape, Erik; Cookmeyer, Taylor; Patel, Aavishkar; Altman, Ehud | We introduce an effective theory for quantum critical points in heavy fermion systems involving a change in carrier density without symmetry breaking. | Session 57: Heavy Fermions and Kondo Interactions |

806 | The Anderson impurity model in a quasicrystal | Wu, Angkun; Gopalakrishnan, Sarang; Pixley, Jed; Ingersent, Kevin | We will discuss the low energy properties of a single magnetic impurity problem in an electronic quasicrystal. | Session 57: Heavy Fermions and Kondo Interactions |

807 | Doping the multiorbital Hund’s coupled impurity: an exploration of non-Fermi liquid ground states | Drouin-Touchette, Victor; Koenig, Elio; Komijani, Yashar; Coleman, Piers | Motivated by the relevance of Hund’s coupling in Iron-based superconductors, we revisit the problem of a multiorbital Anderson impurity with Hund’s interaction. | Session 57: Heavy Fermions and Kondo Interactions |

808 | Interplay of CEF effects and RKKY interaction in Ce- and Yb-based heavy-fermion compounds | Zwicknagl, Gertrud; Zevin, Vilen | We calculate the influence of Crystalline Electric Field (CEF) effects on the indirect Ruderman-Kittel-Kasuya-Yoshida (RKKY) exchange interaction between local 4f moments in Ce- and Ybcompounds. | Session 57: Heavy Fermions and Kondo Interactions |

809 | Theoretical study of odd-parity multipole orders in CeCoSi | Yatsushiro, Megumi; Hayami, Satoru | In the present study, we have investigated potential odd-parity multipole orders in CeCoSi and its physical phenomena including magneto-current and current-distortion effects [4]. | Session 57: Heavy Fermions and Kondo Interactions |

810 | THz Spectroscopy of Mixed-Valence YbAl3 Thin Films | Barbalas, David; Chatterjee, Shouvik; Shen, Kyle; Schlom, Darrell; Armitage, Peter | From extended Drude analysis, we identify that YbAl3 scattering rate and effective mass display temperature dependence suggestive of a slow crossover. | Session 57: Heavy Fermions and Kondo Interactions |

811 | Shubnikov de Haas oscillation measurements on PrT2Cd20 (T = Ni, Pd) “cage” compounds | Breindel, Alexander; Ran, Sheng; Balakirev, Fedor; Singleton, John; Harima, Hisatomo; Maple, M Brian | In order to study the Fermi surface of Pr T 2Cd 20 ( T = Ni, Pd) compounds, we measured Shubnikov de Haas oscillations using the Proximity Detector Oscillator method for H up to 60 T at T = 1.5 K on single crystals. | Session 57: Heavy Fermions and Kondo Interactions |

812 | Fractionalized Fermi liquid in square-lattice Kondo-Heisenberg model | Chang, Yung-Yeh; Chung, Chung-Hou; Tsvelik, Alexei | The Kondo-Heisenberg model on a (un-frustrated ) square lattice is studied via a controlled large-N (Sp(2N)) approach to demonstrate on a general ground the existence of a peculiar metallic state socalled“fractionalized Fermi liquid (FL*)” with unbroken translational symmetry and a Fermi surface volume not controlled by the total electron density. | Session 57: Heavy Fermions and Kondo Interactions |

813 | Universality in the ferromagnetic strong coupling regime of the nonequilibrium Kondo model | Culver, Adrian; Andrei, Natan | We present a new method for calculating the time-dependent many-body wavefunction that follows a local quench. | Session 57: Heavy Fermions and Kondo Interactions |

814 | Partial Kondo screening induced chiral d-wave superconductivity in a honeycomb lattice | Kim, Hee Seung; Yang, Hyeok-Jun; Lee, SungBin | We investigate the unconventional superconducting phases for the J 1 -J 2<span style="font-size:10.8333px"> </span>Kondo-Heisenberg model in a honeycomb lattice at a quarter filling. | Session 57: Heavy Fermions and Kondo Interactions |

815 | Possible multi-orbital ground state in CeCu2Si2 | Marino, Andrea; Amorese, Andrea; Sundermann, Martin; Chen, Kai; hu, zhiwei; Choukani, Fadi; Ohresser, Philippe; Herrero-Martín, Javier; Agrestini, Stefano; Chen, Chien-Te; Lin, Hong-Ji; Haverkort, Maurits; Seiro, Silvia; Geibel, Christoph; Steglich, Frank; Tjeng, Liu; Zwicknagl, Gertrud; Severing, Andrea | Possible multi-orbital ground state in CeCu2Si2 | Session 57: Heavy Fermions and Kondo Interactions |

816 | YbRh2Si2 nanodevices: fabrication and measurements | Chen, Liyang; lowder, dale; Prochaska, Lukas; Buehler-Paschen, Silke; Natelson, Douglas | Here we present a process to fabricate YbRh 2Si 2 nanodevices using a SF 6 dry etch, in which chromium hard masks are used to cover the designed pattern, and then removed by hydrochloric acid. | Session 57: Heavy Fermions and Kondo Interactions |

817 | Physical properties of Kondo lattice YbCuAs2 single crystal | Evans, David; Mun, Eundeok | In this talk, I will present thermodynamic and transport properties of Kondo lattice YbCuAs 2 single crystal. | Session 57: Heavy Fermions and Kondo Interactions |

818 | Pressure tuning of CeRhIn5 microstructures | Kunnelakat John, Janas; Bachmann, Maja; Ronning, Filip; Bauer, Eric; Thompson, Joe; Moll, Philip; Nicklas, Michael | We revisited the temperature-pressure ( T− p) phase diagram of CeRhIn 5 utilizing microstructures to probe the electrical resistivity for well-defined crystalline directions along the a- and c-axes of the tetragonal structure. | Session 58: Heavy Fermions and Quantum Criticality |

819 | Competing interactions in the quasi-2D heavy fermion Ce2RhIn8 | Williams, Travis; Winn, Barry; Ronning, Filip; Bauer, Eric | Here, we use time-of-flight neutron scattering to probe the magnetic interactions in Ce 2RhIn 8 in order to probe the effect of reduced dimensionality on the magnetic coupling. | Session 58: Heavy Fermions and Quantum Criticality |

820 | Magnetoresistance of Sn-substituted CeCoIn5 | Maksimovic, Nikola; Wan, Fanghui; Analytis, James | In this talk, magnetoresistance measurements of CeCoIn5 and Sn-substituted CeCoIn5 will be presented. | Session 58: Heavy Fermions and Quantum Criticality |

821 | Phase diagram and Fermi surface of CeOs4Sb12 under pressure | Goetze, Kathrin; Pearce, Matthew; Coak, Matthew; Goddard, Paul; Coniglio, William; Grockowiak, Audrey; Tozer, Stanley; Graf, David; Maple, M Brian; Brown, Matthew; Ho, Pei-Chun; Singleton, John | We present measurements of resistivity, Hall and magnetoresistance, and TDO conductivity under pressures of up to 3 GPa and in magnetic fields up to 41 T. | Session 58: Heavy Fermions and Quantum Criticality |

822 | Physical properties of Ce3+xRu4Sn13-x (0 ≤ x ≤ 1) single crystals | Lee, Jeonghun; Mun, Eundeok | In this study, we have grown single crystals of Ce 3+xRu 4Sn 13-x (0 ≤ x ≤ 1) by Sn flux. | Session 58: Heavy Fermions and Quantum Criticality |

823 | Heavy fermion behavior in single crystal Pr0.5Ir4Sb10.2Sn1.8 | Cook, Matthew; Burns, Clement | Heavy fermion behavior in single crystal Pr0.5Ir4Sb10.2Sn1.8 | Session 58: Heavy Fermions and Quantum Criticality |

824 | Quantum nematicity in EuB6 | Beaudin, Gabrielle; Witczak-Krempa, William; Bianchi, Andrea | Quantum nematicity in EuB6 | Session 58: Heavy Fermions and Quantum Criticality |

825 | Frustration and quantum first-order transitions in trimer quantum magnets | Weber, Lukas; Wessel, Stefan | In this work, we extend this set to lattices comprised of fully-frustrated spin trimers. | Session 58: Heavy Fermions and Quantum Criticality |

826 | Non-unitary dynamics of 2+1d free Fermions: Emergent quantum criticality | Tang, Qicheng; Chen, Xiao; Zhu, Wei | We investigate non-unitary random dynamics of 2+1d free Fermion models. | Session 58: Heavy Fermions and Quantum Criticality |

827 | Formation of short-range magnetic order and avoided ferromagnetic quantum criticality in pressurized LaCrGe3 | Gati, Elena; Wilde, John; Khasanov, Rustem; Xiang, Li; Dissanayake, Sachith; Gupta, Ritu; Matsuda, Masaaki; Ye, Feng; Haberl, Bianca; Kaluarachchi, Udhara; McQueeney, Robert; Kreyssig, Andreas; Budko, Sergey; Canfield, Paul | In this talk, we will present our results from combining thermodynamic, transport, x-ray and neutron scattering as well as μSR measurements on LaCrGe 3 under pressure to identify the various phases in the phase diagram across the avoided FM quantum-critical point. | Session 58: Heavy Fermions and Quantum Criticality |

828 | Magnetic Structures in the Vicinity of the Pressure-Induced Superconducting Phase in CeNiC2 | Zhang, Depei; Ma, Hanming; Gouchi, Jun; Ye, Feng; Matsuoka, Takahiro; Uwatoko, Yoshiya; Matsuda, Masaaki | Most importantly, we have recently observed the pressured-induced heavy-fermion superconductivity in this compound below 3.5 K under 10.7 and 11GPa [2]. | Session 58: Heavy Fermions and Quantum Criticality |

829 | Evolution of the electronic structure of CeCoIn5 across a quantum critical point | Eilbott, Daniel; Ai, Ping; Lin, Yi; Ciocys, Samuel; Maksimovic, Nikola; Wan, Fanghui; Denlinger, Jonathan; Analytis, James; Lanzara, Alessandra | Here we report a doping- and temperature-dependent study of CeCoIn5 by angle-resolved photoemission spectroscopy. | Session 58: Heavy Fermions and Quantum Criticality |

830 | The Hall Effect and Dynamical Scaling about the Quantum Critical Point in Elemental Chromium | Armstrong, Stephen; Silevitch, Daniel; Rosenbaum, Thomas | The Hall Effect and Dynamical Scaling about the Quantum Critical Point in Elemental Chromium | Session 58: Heavy Fermions and Quantum Criticality |

831 | Universality and quantum criticality in quasiperiodic spin chains | Agrawal, Utkarsh; Gopalakrishnan, Sarang; Vasseur, Romain | We use this approach to analyze the quasiperiodic Heisenberg, Ising, and Potts spin chains, as well as a phenomenological model for the quasiperiodic many-body localization transition. | Session 58: Heavy Fermions and Quantum Criticality |

832 | First Principles Study on Pressure Induced Valence Transition in Eu-based Compounds | Song, Young-Joon; Valenti, Roser | In this presentation, we will focus on the tetragonal magnetic Eu-based compounds. | Session 58: Heavy Fermions and Quantum Criticality |

833 | Measuring the macroscopic angular momentum in 3He-A via superfluid sound | Forstner, Stefan; Baker, Christopher; Harris, Glenn; Sawadsky, Andreas; Choi, Hyoungsoon; Bowen, Warwick | In this talk, we present a new experimental approach in which we create a substantial coupling between the chiral current and the third sound of superfluid 3He. | Session 59: Helium-3 and Helium-4 Low Temperature Properties |

834 | Effect of the boundary condition on the Kapitza resistance between superfluid 3He-B and sintered metal | Haley, Richard; Autti, Samuli; Jennings, Asher; Pickett, George; Schanen, Roch; Soldatov, Arkady; Tsepelin, Viktor; Vonka, Jakub; Zmeev, Dmitry | In the ballistic regime of superfluid 3He−B we find the Kapitza resistance can be described via scattering of thermal quasiparticle excitations with a macroscopic geometric area rather than the sintered metal’s microscopic area. | Session 59: Helium-3 and Helium-4 Low Temperature Properties |

835 | Heat Transport in Superfluid 3He in Anisotropic Aerogel | Sharma, Priya; Sauls, James | We report new theoretical results for heat transport by quasiparticle excitations in superfluid 3He infused into silica aerogel engineered with uniaxial anisotropy. | Session 59: Helium-3 and Helium-4 Low Temperature Properties |

836 | Spectroscopy of surface Majorana fermions in superfluid 3He-B using a mechanical oscillator | Mizushima, Takeshi; Mori, Wataru | Here we investigate the damping mechanism of a laterally oscillating plate in the topological superfluid 3He, and clarify the roles of surface Majorana fermions. | Session 59: Helium-3 and Helium-4 Low Temperature Properties |

837 | Low temperature dynamics of quasi-1d 3He: NMR studies | Huan, Chao; Adams, Johnny; Lewkowitz, Marc; Masuhara, Naoto; Steinke, Lucia; Candela, Donald; Sullivan, Neil | We explore Luttinger liquid behavior of 3He constrained to nanochannels in mesoporous MCM-41, thermalized using silver powder. | Session 59: Helium-3 and Helium-4 Low Temperature Properties |

838 | The Effect of Leggett–Takagi Relaxation on Vortex-Generated Spin Waves in Superfluid 3He-B | Laine, Sami; Thuneberg, Erkki | Here, we study the phenomenon at intermediate temperatures T∼0.5 T c within the framework of Leggett–Takagi theory [4] by solving the equations of spin dynamics for an isolated vortex line in the absence of spin diffusion and calculating the energy relaxation rate. | Session 59: Helium-3 and Helium-4 Low Temperature Properties |

839 | X-Ray Imaging of the Phase Separation in Mixed 3He/4He Nanodroplets | O’Connell, Sean; Verma, Deepak; Feinberg, Alexandra; Erukala, Swetha; Saladrigas, Catherine; Toulson, Benjamin; Borgwardt, Mario; Shivaram, Niranjan; Lin, Ming-Fu; Al Haddad, Andre; Jaeger, Wolfgang; Bostedt, Christoph; Walter, Peter; Gessner, Oliver; Vilesov, Andrey | A mixture of 3He and 4He liquids separates into a 3He-rich and a 4He-rich phase below 0.87 K. Here, we present a study of this phase separation in freely-rotating, sub-micrometer-sized helium droplets under molecular beam conditions in vacuum at T ≈ 0.15 K. Density distributions within individual droplets are studied by ultrafast x-ray diffraction using the LCLS free electron laser. | Session 59: Helium-3 and Helium-4 Low Temperature Properties |

840 | Specific heat of a thin 4He film on graphite | Boninsegni, Massimo; Moroni, Saverio | Specific heat of a thin 4He film on graphite | Session 59: Helium-3 and Helium-4 Low Temperature Properties |

841 | Cluster Aggregation in Bosonic and Fermionic Helium Nanodroplets | Feinberg, Alexandra; Verma, Deepak; O’Connell, Sean; Erukala, Swetha; Tanyag, Rico; Pang, Weiwu; Saladrigas, Catherine; Toulson, Benjamin; Borgwardt, Mario; Shivaram, Niranjan; Lin, Ming-Fu; Al Haddad, Andre; Jäeger, Wolfgang; Bostedt, Christoph; Walter, Peter; Gessner, Oliver; Vilesov, Andrey | Here, we study the formation of clusters in non-superfluid fermionic helium-3 droplets, which also rotate but are devoid of any quantum vortices. | Session 59: Helium-3 and Helium-4 Low Temperature Properties |

842 | Tuning the quantumness of simple Bose systems and the evolution of the phase diagram | Kora, Youssef; Boninsegni, Massimo; Son, Dam; Zhang, Shiwei | By means of first-principle Quantum Monte Carlo simulations, we study systems of Bose particles interacting via the Lennard-Jones interaction, which constitute a broad class of condensed matter systems that ranges from crystals to normal fluids to superfluids and gases. | Session 59: Helium-3 and Helium-4 Low Temperature Properties |

843 | Suppression of triplet superfluidity near magnetically-active surfaces | Vorontsov, Anton | I will review existing models of magnetic scattering to prove that they cannot, in principle, give such suppression of the A phase. | Session 59: Helium-3 and Helium-4 Low Temperature Properties |

844 | Functional Renormalization Group Study of Correlated Bose-Einstein Systems — Low-Temperature Properties of Specific Heat | Kirikoshi, Akimitsu; Kita, Takafumi | In this talk, we report the numerical results on the specific heat of superfluid 4He obtained by solving the functional renormalization group equations. | Session 59: Helium-3 and Helium-4 Low Temperature Properties |

845 | Coupling of Pair Fluctuations to Zero Sound: A Field Theoretical Approach | Lin, Wei-Ting; Sauls, James | By introducing auxiliary bosonic fields to describe the zero sound and pair fluctuations, we obtain the collisionless Boltzmann-Landau equation for zero sound and the GL theory for the pair fluctuations. | Session 59: Helium-3 and Helium-4 Low Temperature Properties |

846 | Non-linear Dynamics of the Trapped Quantum Vortex | Depellette, Joe; Hayward, Callum; Guthrie, Andrew; Kafanov, Sergey; Morrison, Nathaniel; Noble, Mark; Pashkin, Yuri; Pickett, George; Tsepelin, Viktor | We analysed the non-linear response of a doubly clamped nanobeam resonator submerged in helium-4 at 10 mK in the presence of a partially trapped vortex. | Session 59: Helium-3 and Helium-4 Low Temperature Properties |

847 | Possible coexistence of Superfluidity and Spatial Order in Monolayers of Helium-4 | USAMI, JUN; Toda, Ryo; Fukuyama, Hiroshi | Possible coexistence of Superfluidity and Spatial Order in Monolayers of Helium-4 | Session 59: Helium-3 and Helium-4 Low Temperature Properties |

848 | High harmonic generation in Mott Insulators: Insights from dynamical mean field theory | Eckstein, Martin | We use dynamical mean-field theory [1] to study the electronic structure of quantum materials in the presence of strong fields. | Session 60: High Harmonic Generation of Strongly Correlated Quantum Materials |

849 | High harmonic generation driven by mid-infrared lasers | Chang, Zenghu | In recent years, high-power ultrafast lasers centered at 1.7 to 2.5 micron have enabled the generation of attosecond X-ray pulses reaching the water window (282 to 533 eV), which is of great interest given their applications in the study of electron dynamics in atoms, molecules and condensed matter containing carbon, nitrogen, oxygen and other important elements [1]. | Session 60: High Harmonic Generation of Strongly Correlated Quantum Materials |

850 | Anomalous symmetry breaking in an insulating cuprate | Hsieh, David | In this talk, I will discuss recent optical second harmonic generation results on a model insulating cuprate Sr 2CuO 2Cl 2, which show evidence of anomalous broken symmetries suggesting physics beyond these simple models. | Session 60: High Harmonic Generation of Strongly Correlated Quantum Materials |

851 | High harmonic generation in heavy fermion systems | Fauseweh, Benedikt; Zhu, Wei; Zhu, Jian-Xin | In this talk, we examine the nonequilibrium dynamics in a prototypical class of strongly correlated materials: heavy fermion systems. | Session 60: High Harmonic Generation of Strongly Correlated Quantum Materials |

852 | Higher-order topology of Bismuth | Goswami, Pallab; Tyner, Alexander | In this work, we perform homotopy classification of non-Abelian Berry’s connections for the Liu-Allen model of bismuth, and compute bulk invariants from the windings of gauge-invariant eigenvalues of straight Wilson lines and planar Wilson loops. | Session 61: Higher-Order Topological Insulators |

853 | Quasi-One-Dimensional Higher-Order Topological Insulators | Yoon, Chiho; Liu, Cheng-Cheng; Min, Hongki; Zhang, Fan | We show that in fact the two α phases are both pristine HOTIs yet with distinct hinge state patterns. | Session 61: Higher-Order Topological Insulators |

854 | Filling anomaly in 2D and 3D C4 symmetric lattices | Fang, Yuan; Cano, Jennifer | As an example, we build an explicit tight-binding model on a body-centered tetragonal lattice and numerically calculate the energy spectrum on a rod that is finite in two dimensions and infinite in the third. | Session 61: Higher-Order Topological Insulators |

855 | Quadrupole moments, edge polarizations, and corner charges in the Wannier representation | Ren, Shang; Souza, Ivo; Vanderbilt, David | The modern theory of polarization determines the macroscopic end charge of a truncated 1D insulator, modulo e, from a knowledge of bulk properties alone. | Session 61: Higher-Order Topological Insulators |

856 | Bound states in the continuum of higher-order topological phases | Benalcazar, Wladimir; Cerjan, Alexander | In this talk, we connect the study of bound states in the continuum (BICs) with the field of topological band theory. | Session 61: Higher-Order Topological Insulators |

857 | Observation of a higher-order topological bound state in the continuum | Cerjan, Alexander; Jürgensen, Marius; Benalcazar, Wladimir; Mukherjee, Sebabrata; Rechtsman, Mikael | Observation of a higher-order topological bound state in the continuum | Session 61: Higher-Order Topological Insulators |

858 | Simulating Higher-Order Topological Insulators in Density Wave Insulators | Lin, Kuan-Sen; Bradlyn, Barry | In this talk, we present a general procedure to compute the gauge fields in higher dimensions associated to low-dimensional systems with periodic density wave modulations. | Session 61: Higher-Order Topological Insulators |

859 | Glide Symmetry Protected Higher-Order Topological Insulators from Semimetals with butterfly-like Nodal Lines | ZHOU, XIAOTING; Hsu, Chuang-Han; Aramberri, Hugo; Huang, Cheng-Yi; Iraola, Mikel; Mane, Juan; Garcia Vergniory, Maia; Lin, Hsin; Kioussis, Nicholas | We propose a new family of topological semimetals (TSMs) which harbors an unprecedented nodal line (NL) landscape consisting of a pair of concentric intersecting coplanar ellipses (CICE). | Session 61: Higher-Order Topological Insulators |

860 | Square-root higher-order topological insulators and topological semimetals | Mizoguchi, Tomonari; Kuno, Yoshihito; Yoshida, Tsuneya; Hatsugai, Yasuhiro | In this presentation, we address several extensions of the square-root topological insulator, taking a 2D decorated honeycomb model as an example. | Session 61: Higher-Order Topological Insulators |

861 | Pfaffian formalism for higher-order topological insulators | Li, Heqiu; Sun, Kai | We generalize the Pfaffian formalism, which has been playing an important role in the study of time-reversal invariant topological insulators (TIs), to 3D chiral higher-order topological insulators (HOTIs) protected by the product of four-fold rotational symmetry C 4 and the time-reversal symmetry T. | Session 61: Higher-Order Topological Insulators |

862 | Principles of higher-order topology | Sur, Shouvik; Tyner, Alexander; Goswami, Pallab | In this work, we develop a unified theory of different orders of topological insulators, based on first and second homotopy classifications of non-Abelian, Berry’s connections. | Session 61: Higher-Order Topological Insulators |

863 | Generalized corner-charge formula in higher-order topological insulators and its application to one-dimensional electrides | Takahashi, Ryo; Hirayama, Motoaki; Zhang, Tiantian; Matsuishi, Satoru; Hosono, Hideo; Murakami, Shuichi | As an application of these formulae, we show that the apatite A 6B 4(SiO 4) 6, one of the one-dimensional electrides, realizes a higher-order topological insulator with 2/3-filled one-dimensional hinge states [3,4], which is explained with our formula. | Session 61: Higher-Order Topological Insulators |

864 | Higher-Order Topology and Defect States in the Charge-Density-Wave Phase of (TaSe4)2I | Hua, Meng; Khor, Brian; Hu, Yichen; Wieder, Benjamin J.; Teo, Jeffrey C. Y. | We present a physically motivated, lattice-commensurate coupled-wire model based on Topological Quantum Chemistry and crystalline symmetry that approximates the CDW phase of (TaSe 4) 2I. | Session 61: Higher-Order Topological Insulators |

865 | Discovery of Higher-Order Topological Insulators using the Spin Hall Conductivity as a Topology Signature | Costa, Marcio; Schleder, Gabriel; Mera Acosta, Carlos; Padilha, Antonio; Cerasoli, Frank; Buongiorno Nardelli, Marco; Fazzio, Adalberto | Here we show a connection between spin Hall effect and HOTIs using a combination of ab initio calculations and tight-binding modeling. | Session 61: Higher-Order Topological Insulators |

866 | Quantized surface magnetism and higher-order topology: Application to the Hopf insulator | Zhu, Penghao; Hughes, Taylor; Alexandradinata, Aris | We identify topological aspects of the subextensive magnetic moment contributed by the surfaces of a three-dimensional crystallite – assumed to be insulating in the bulk as well as on all surface facets, with trivial Chern invariants in the bulk. | Session 61: Higher-Order Topological Insulators |

867 | Theory for viscous electron transport in two-dimensional electron systems | Adam, Shaffique | In this talk, I will discuss the differences in hydrodynamic transport between monolayer graphene, bilayer graphene and GaAs heterostructures. | Session 62: Hydrodynamic Electron Flow |

868 | Disorder-enabled hydrodynamics of charge and heat transport in monolayer graphene | Zarenia, Mohammad; Principi, Alessandro; Vignale, Giovanni | In this talk I show that semimetals like graphene support two distinct hydrodynamics regimes: an ambipolar hydrodynamic regime near the charge neutrality point (i.e., with nearly equal densities of electrons and holes), and a unipolar hydrodynamic regime when a single species of carriers dominates. | Session 62: Hydrodynamic Electron Flow |

869 | Transport in bilayer and multilayer graphene | Wagner, Glenn; Nguyen, Dung; Simon, Steven | We introduce a simple two-fluid hydrodynamic model of electrons and holes interacting via Coulomb drag and compare our results to the full QBE calculation. | Session 62: Hydrodynamic Electron Flow |

870 | Bilayer graphene as a model hydrodynamic conductor | Hone, James | This talk will describe our work establishing bilayer graphene as a model hydrodynamic semiconductor, in which carrier-carrier collisions play a dominant role in determining the conductivity over a wide range of temperature and carrier density. | Session 62: Hydrodynamic Electron Flow |

871 | Geometric control of universal hydrodynamic flow in a two dimensional electron fluid | Hamilton, Alex | Here we introduce a new approach to studying hydrodynamic flow. | Session 62: Hydrodynamic Electron Flow |

872 | Imaging double- moiré pattern in twisted bilayer graphene aligned on h-BN substrate | Huang, Xiong; Chen, Lingxiu; Tang, Shujie; Jiang, Chengxin; Chen, chen; Wang, Huishan; Shen, Zhixun; Wang, Haoming; Cui, Yongtao | Two graphene layers are directly grown on h-BN flakes using CVD method. | Session 63: Imaging of 2D Moire Systems |

873 | Structure of twisted transition metal dichalcogenides | Phillips, Madeleine; Hellberg, C Stephen | We present density functional theory (DFT) calculations of the reconstruction in MoSe 2/WSe 2 hetero-bilayers twisted a small angle away from 180-degree stacking. | Session 63: Imaging of 2D Moire Systems |

874 | Stripe phases in WSe2/WS2 moiré superlattices | Jin, Chenhao; Tao, Zui; Li, Tingxin; Xu, Yang; Tang, Yanhao; Zhu, Jiacheng; Liu, Song; Watanabe, Kenji; Taniguchi, Takashi; Hone, James; Fu, Liang; Shan, Jie; Mak, Kin Fai | We find stripe crystal states (insulating) at the ½ filling of the moiré superlattice and electronic liquid crystal states (conducting) over a large doping range around the ½ filling. | Session 63: Imaging of 2D Moire Systems |

875 | Observation of Electrically Tunable van Hove Singularities in Twisted Bilayer Graphene from NanoARPES | Muzzio, Ryan; Jones, Alfred; Majchrzak, Paulina; Pakdel, Sahar; Curcio, Davide; Volckaert, Klara; Biswas, Deepnarayan; gobbo, jacob; Singh, Simranjeet; Robinson, Jeremy; Watanabe, Kenji; Taniguchi, Takashi; Kim, Timur; Cacho, Cephise; Lanata, Nicola; Miwa, Jill; Hofmann, Philip; Katoch, Jyoti; Ulstrup, Søren | This work examines the effect of electrical doping on the electronic band structure of twisted bilayer graphene using a back-gated device architecture for angle-resolved photoemission measurements with a nano-focused light spot. | Session 63: Imaging of 2D Moire Systems |

876 | Nanoscale imaging of moiré superlattices in twisted van der Waals heterostructures | Luo, Yue; Engelke, Rebecca; Mattheakis, Marios; Tamagnone, Michele; Carr, Stephen; Watanabe, Kenji; Taniguchi, Takashi; Kaxiras, Efthimios; Kim, Philip; Wilson, William | Here we report a versatile scanning probe microscopy employing infrared light for imaging moiré superlattices of twisted bilayers graphene encapsulated by hexagonal boron nitride. | Session 63: Imaging of 2D Moire Systems |

877 | Moiré patterns in graphene and transition metal dichalcogenide heterostructures | Molino, Laurent; Plumadore, Ryan; Alezzi, Mohammed; Adam, Shaffique; Luican-Mayer, Adina | In this work, we use scanning tunneling microscopy and spectroscopy to study moiré patterns in mechanically assembled heterostructures of graphene and transition metal dichalcogenides. | Session 63: Imaging of 2D Moire Systems |

878 | LEEM imaging of the moiré pattern of twisted bilayer graphene | de Jong, Tobias; Benschop, Tjerk; Chen, Xing; Efetov, Dmitri; Baumberger, Felix; Tromp, Rudolf; de Dood, Michiel; Allan, Milan P.; van der Molen, Sense Jan | Here, we demonstrate that Low Energy Electron Microscopy (LEEM) can directly image MABLG moiré patterns on the full device scale, identifying specific areas of the magic twist angle. | Session 63: Imaging of 2D Moire Systems |

879 | Thermodynamic study of magic-angle graphene using scanning SET. | Zondiner, Uri; Rozen, Asaf; Park, Jeong Min; Rodan-Legrain, Daniel; Cao, Yuan; Queiroz, Raquel; Taniguchi, Takashi; Watanabe, Kenji; Stern, Ady; von Oppen, Felix; Oreg, Yuval; Berg, Erez; Jarillo-Herrero, Pablo; Ilani, Shahal | I will present local measurements of electronic compressibility, entropy, and magnetization in magic-angle graphene, taken by a scanning single-electron transistor (SET). | Session 63: Imaging of 2D Moire Systems |

880 | Thermodynamics of spin waves in a quantum Hall ferromagnet | Lee, Seung Hwan; Pierce, Andrew; Xie, Yonglong; Forrester, Patrick; Watanabe, Kenji; Taniguchi, Takashi; Halperin, Bertrand; Yacoby, Amir | In this talk, we present a local thermodynamic measurement of the ν= 1 state in the presence of magnons using a scanning single electron transistor (SET). | Session 63: Imaging of 2D Moire Systems |

881 | Isotopic Effect of Carrier Relaxation in Graphene-hBN Heterostructures | Brasington, Alexandra; Liu, Song; Edgar, James; Taniguchi, Takashi; Watanabe, Kenji; Sandhu, Arvinder; LeRoy, Brian | Theoretical studies have predicted a higher thermal conductivity with higher isotopic purity of hBN, due to reduced phonon scattering from isotopic defects. | Session 63: Imaging of 2D Moire Systems |

882 | Imaging small angle twisted bilayer graphene aligned with hexagonal Boron Nitride | Lai, Xinyuan; Tilak, Nikhil; Mao, Jinhai; Jiang, Yuhang; Watanabe, Kenji; Taniguchi, Takashi; Guinea, Francisco; Andrei, Eva | Using scanning tunneling microscopy and spectroscopy (STM/STS) on MATBG aligned with hBN, we observe a network of moiré solitons where the hBN and MATBG crystals are perfectly commensurate. | Session 63: Imaging of 2D Moire Systems |

883 | Direct Observation of Dirac Fermion Cloning in Graphene/SiC Heterostructure | Lu, Qiangsheng; Bian, Guang | In this work, we measured the electronic structures of the BLG/SiC heterostructure. | Session 63: Imaging of 2D Moire Systems |

884 | Bound states in continuum in graphene interfaces | Dai, Zhongwei; Gao, Zhaoli; Pershoguba, Sergey; Tiwale, Nikhil; Subramanian, Ashwanth; Zhang, Qicheng; Eads, Calley; Tenney, Samuel; Nam, Chang-Yong; Zang, Jiadong; johnson, charlie; Sadowski, Jerzy | We present experimental evidence of discrete bound states coexisting in the continuum (BIC) in certain graphene interface systems. | Session 63: Imaging of 2D Moire Systems |

885 | Twist angle homogeneity in twisted bilayer graphene devices studied with STM | Benschop, Tjerk; de Jong, Tobias; Stepanov, Petr; Lu, Xiaobo; Stalman, Vincent; van der Molen, Sense Jan; Efetov, Dmitri; Allan, Milan | In this talk, I will introduce a new method to quantitatively describe the local (in)homogeneity present in these devices, potentially on different length scales. | Session 63: Imaging of 2D Moire Systems |

886 | One-dimensional moiré superlattices and flat bands in collapsed chiral carbon nanotubes | Arroyo Gascón, Olga; Fernández-Perea, Ricardo; Suarez Morell, Eric; Cabrillo, Carlos; Chico, Leonor | Resorting to a combination of approaches, namely, molecular dynamics to obtain the relaxed geometries and tight-binding calculations validated against ab initio modeling, we find that magic angle physics occur in collapsed carbon nanotubes [3]. | Session 63: Imaging of 2D Moire Systems |

887 | Screening current enabled Andreev reflection in a chiral quantum Hall edge state | Michelsen, Andreas; Recher, Patrik; Braunecker, Bernd; Schmidt, Thomas | We address this by modelling the system with a many-body Hamiltonian motivated by experiments, and integrate out the superconductor to get an effective pairing Hamiltonian in the quantum Hall edge state. | Session 64: Integer Quantum Hall Effect: Coupled Layers, Superconductivity, and Interferometry |

888 | Magneto-transport in near surface InAs quantum wells in contact with NbTiN | Hatefipour, Mehdi; Mayer, William; Goss, Noah; Strickland, William; Yuan, Joseph; Wickramasinghe, Kaushini; Sardashti, Kasra; Lu, Tzu-Ming; Shabani, Javad | In this work, we study the proximity effect by monitoring the current flow along the superconductor-semiconductor interface. | Session 64: Integer Quantum Hall Effect: Coupled Layers, Superconductivity, and Interferometry |

889 | Role of interactions on topological flat bands in twisted bilayer graphene at high magnetic field | Imran, Muhammad; Barlas, Yafis | We study the role of interactions in small angle twisted bilayer graphene in the presence of high magnetic fields. | Session 64: Integer Quantum Hall Effect: Coupled Layers, Superconductivity, and Interferometry |

890 | DMRG study of strongly interacting Z2 flatbands: a toy model inspired by twisted bilayer graphene | Eugenio, Paul; Dag, Ceren | In the first scenario — which we argue to be a toy model inspired by the chirally symmetric continuum model for twisted bilayer graphene — the opposite Chern LLL’s are Kramer pairs, and thus there exists time-reversal symmetry (Z2). | Session 64: Integer Quantum Hall Effect: Coupled Layers, Superconductivity, and Interferometry |

891 | Density dependence of the excitation gap in Si/SiGe bilayers | Chen, Davis; Cai, Suyang; Hsu, Nai-Wen; Huang, Shi-Hsien; Chuang, Yen; Li, Jiun-Yun; Liu, Chee; Lu, Tzu-Ming; Laroche, Dominique | We report low-temperature magneto-transport measurements of an undoped Si/SiGe antisymmetric double quantum well heterostructure . | Session 64: Integer Quantum Hall Effect: Coupled Layers, Superconductivity, and Interferometry |

892 | Quantum Transport in n-type Tellurium Quantum Well | Niu, Chang; Qiu, Gang; Wang, Yixiu; Wu, Wenzhuo; Ye, Peide (Peter) | In this work, we fabricated double-gated n-type Te Hall–bar devices, which can operate as two separate or coupled top and bottom layers controlled by the top gate and back gate independently. | Session 64: Integer Quantum Hall Effect: Coupled Layers, Superconductivity, and Interferometry |

893 | A tunable Fabry-Pérot quantum Hall interferometer in graphene | Déprez, Corentin; Veyrat, Louis; Vignaud, Hadrien; Nayak, Goutham; Watanabe, Kenji; Taniguchi, Takashi; Gay, Frédéric; Sellier, Hermann; Sacepe, Benjamin | In this talk, I will show that high-mobility monolayer graphene equipped with a series of gate-tunable quantum point contacts provides a model system to perform Fabry-Pérot quantum Hall interferometry. | Session 64: Integer Quantum Hall Effect: Coupled Layers, Superconductivity, and Interferometry |

894 | Modeling the local signatures of edge magnetoplasmons in a quantum Hall insulator | Alfaro, Julien; Wang, Taige; Cauchon, Alex; Allen, Monica | This project utilizes COMSOL finite element simulations to model the experimental signatures of quantum Hall edge currents that would be detectable using microwave impedance microscopy (MIM). | Session 64: Integer Quantum Hall Effect: Coupled Layers, Superconductivity, and Interferometry |

895 | Emergence of spin-active channels at a quantum Hall interface | Saha, Amartya; De, Suman; Rao, Sumathi; Gefen, Yuval; Murthy, Ganpathy | We study the ground state of a system with an interface between ν=4 and ν=3 in the quantum Hall regime. | Session 64: Integer Quantum Hall Effect: Coupled Layers, Superconductivity, and Interferometry |

896 | Gapless Spin Wave Transport Through a Quantum Canted-Antiferromagnet | Fu, Hailong; Huang, Ke; Watanabe, Kenji; Taniguchi, Takashi; Zhu, Jun | In this work, we demonstrate an all-electrical approach to obtain the dispersion relation ω(k) of spin wave excitations in bilayer graphene using transport devices that integrate a Fabry-Pérot cavity to resonantly select discrete wave vectors of the spin wave. | Session 64: Integer Quantum Hall Effect: Coupled Layers, Superconductivity, and Interferometry |

897 | Current correlations of Cooper-pair tunneling into a quantum Hall system | Michelsen, Andreas; Schmidt, Thomas; Idrisov, Edvin | We study Cooper pair transport through a quantum point contact between a superconductor and a quantum Hall edge state at integer and fractional filling factors. | Session 64: Integer Quantum Hall Effect: Coupled Layers, Superconductivity, and Interferometry |

898 | Probing Andreev edge state with shot noise | Sahu, Manas; Paul, Arup; Sutradhar, Jagannath; Watanabe, Kenji; Taniguchi, Takashi; Singh, Vibhor; Mukerjee, Subroto; Banerjee, Sumilan; Das, Anindya | Here, we report on measurements of both electrical conductance and shot noise in a graphene QH and SC junction at integer filling ν=2. | Session 64: Integer Quantum Hall Effect: Coupled Layers, Superconductivity, and Interferometry |

899 | Three-layer coherent quantum Hall effect | Zeng, Yihang; Dean, Cory | In this work, we report for the first time a triple-layer system with two hBN tunnel barriers between three graphene sheets. | Session 64: Integer Quantum Hall Effect: Coupled Layers, Superconductivity, and Interferometry |

900 | Fabry-Perot interferometer in bilayer graphene | Fu, Hailong; Huang, Ke; Watanabe, Kenji; Taniguchi, Takashi; Zhu, Jun | In this work, we report on the fabrication and measurements of interferometer devices in bilayer graphene using different designs. | Session 64: Integer Quantum Hall Effect: Coupled Layers, Superconductivity, and Interferometry |

901 | Numerical evidence for marginal scaling at the integer quantum Hall transition | Dresselhaus, Elizabeth; Sbierski, Bjoern; Gruzberg, Ilya | In this work, we provide numerical evidence for such a scenario by using extensive simulations of various incarnations of network models at unprecedented length scales. | Session 64: Integer Quantum Hall Effect: Coupled Layers, Superconductivity, and Interferometry |

902 | Magnetic Weyl semimetals and nodal line materials | Felser, Claudia | Magnetic Weyl semimetals and nodal line materials | Session 65: Interplay of Electronic Topology with Magnetic, Superconducting, and Crystalline Orders |

903 | Multiple topological facets of Bismuth | Avraham, Nurit; Beidenkopf, Haim; Yan, Binghai; Felser, Claudia; Nayak, Abhay; Reiner, Jonathan; Queiroz, Raquel; Fu, Huixia; Shekhar, Chandra; norris, Andrew; Sun, Yan; Qi, Yanpeng; Pan, Lin; isaeva, Anna; Zeunger, Alexander | I will explain the origin for this ambiguity and present scanning tunneling microscopy data in which we resolve the topological classification of Bismuth, as a strong topological insulator with weak indices, by spectroscopically mapping the response of its boundary modes to a topological defect in the form of a screw dislocation [1]. | Session 65: Interplay of Electronic Topology with Magnetic, Superconducting, and Crystalline Orders |

904 | Chern numbers and nodal points in topological semi metals. | Garcia Vergniory, Maia; Xu, Yuanfeng; Wieder, Benjamin; Robredo, Iigo; Elcoro, Luis; Regnault, Nicolas; Schroeter, Niels; Cano, Jennifer; Bradlyn, Barry; Schoop, Leslie; Felser, Claudia; Bernevig, Andrei | Using magnetic band theory and topological indices obtained from Magnetic Topological Quantum Chemistry (MTQC), I will present a systematic way of identifying magnetic topological materials. | Session 65: Interplay of Electronic Topology with Magnetic, Superconducting, and Crystalline Orders |

905 | Chiral topological superconductivity in the heavy fermion superconductor UTe2 | Madhavan, Vidya; Jiao, Lin; Howard, Sean; Ran, Sheng; Wang, Zhenyu; Olivares Rodriguez, Jorge; Sigrist, Manfred; Wang, Ziqiang; Butch, Nicholas | In this talk I present scanning tunneling microscopy (STM) data on the newly discovered heavy fermion superconductor, UTe 2 with a T C of 1.6K. I will show signatures of coexisting Kondo effect and superconductivity which show competing spatial modulations within one unit-cell. | Session 65: Interplay of Electronic Topology with Magnetic, Superconducting, and Crystalline Orders |

906 | Emergent pseudo-electromagnetic fields in topological semimetals | Ilan, Roni | We review the different mechanisms for creating effective pseudo-fields and their observable consequences, ranging from anomalous transport to sound absorption. | Session 65: Interplay of Electronic Topology with Magnetic, Superconducting, and Crystalline Orders |

907 | Almost zero-gap gap semiconductor/semimetal to insulator transition in layered chalcogenide Ta2NiSe5 | Takagi, Hidenori | We find a drastic collapse of the 0.2 eV gap with approaching the STM-tip to the sample surface, which we argue to indicate the many body nature of the gap. | Session 66: Is Ta2NiSe5 an Excitonic Insulator? |

908 | Band hybridization at the semimetal-semiconductor transition of Ta2NiSe5 enabled by mirror-symmetry breaking | Watson, Matthew | We present a fresh look at the experimental electronic structure of the excitonic insulator candidate Ta 2NiSe 5. | Session 66: Is Ta2NiSe5 an Excitonic Insulator? |

909 | Spatial mapping of collective modes and time-resolved tracking of excitonic order melting in Ta2NiSe5 at room temperature | Andrich, Paolo; Bretscher, Hope | In this talk, I will present our investigation of this material by imaging the spatial propagation of the condensate’s collective modes and detecting the effect of the destruction of the excitonic order on a femtosecond timescale. | Session 66: Is Ta2NiSe5 an Excitonic Insulator? |

910 | Electronic phase diagram of the excitonic insulator candidates Ta2Ni(Se1-xSx)5 probed by Raman scattering | Volkov, Pavel | We observe an overdamped electronic mode, consistent with excitonic fluctuations in a semimetal, softening at the transition temperature, indicating a strong electronic contribution to ordering. | Session 66: Is Ta2NiSe5 an Excitonic Insulator? |

911 | The spontaneous symmetry breaking in Ta2NiSe5 is structural in nature | Baldini, Edoardo; Zong, Alfred; Choi, Dongsung; Lee, Changmin; Michael, Marios; Windgaetter, Lukas; Mazin, Igor; Latini, Simone; Azoury, Doron; Lyu, Baiqing; Kogar, Anshul; Wang, Yao; Lu, Yangfan; Takayama, Tomohiro; Takagi, Hidenori; Millis, Andrew; Rubio, Angel; Demler, Eugene; Gedik, Nuh | The spontaneous symmetry breaking in Ta2NiSe5 is structural in nature | Session 66: Is Ta2NiSe5 an Excitonic Insulator? |

912 | Magnetic proximity effect in graphene on 2D van der Waals magnets | Tseng, Chun-Chih; Hwangbo, Kyle; Jiang, Qianni; Watanabe, Kenji; Taniguchi, Takashi; Chu, Jiun-Haw; Xu, Xiaodong; Yankowitz, Matthew | Here, we investigate the MPE in heterostructures comprising graphene on XPS 3 (X=Ni/Fe/Mn) substrates. | Session 67: Magnetism in 2D Systems |

913 | Interplay between opto-electronic response and edge magnetic coupling in graphene nanoflakes | Esteban-Puyuelo, Raquel; Pujari, Bhalchandra; Grånäs, Oscar; Sanyal, Biplab | We analyze how the size and shape of graphene nanoflakes can be used to alter their magnetic structures and optical properties, using time-dependent density functional theory. | Session 67: Magnetism in 2D Systems |

914 | Imaging the Collimation and Magnetic Focusing of Dirac Electrons | Dutta, Debarghya; Rozen, Asaf; Birkbeck, John; Ilani, Shahal | In this work, we observe that the naturally occuring P-N junction formed at a metal-graphene interface leads to a strongly collimated beam of electrons, which can be turned on/off by simply changing the doping of the graphene. | Session 67: Magnetism in 2D Systems |

915 | First principle study on electronic, magnetic, and phase transition properties of 2D magnetic material CrTe2 | Liu, Yuhang; Coster, George; Lake, Roger; Neupane, Mahesh | In this work, we studied the structural, electronic, and magnetic properties of 1T, 1H, and 2H phases of CrTe 2 using density functional theory (DFT). | Session 67: Magnetism in 2D Systems |

916 | Spin-dependent magneto-transport in bilayer WSe2 | Shih, En-Min; Shi, Qianhui; Rhodes, Daniel; Kim, Bumho; Watanabe, Kenji; Taniguchi, Takashi; Hone, James; Dean, Cory | We report magneto-transport measurements in Hall bar and corbino geometry in the bilayer WSe 2 van der Waals heterostructure two-dimensional electron system, showing distinct behavior for electrons with spin-up and spin-down orientations. | Session 67: Magnetism in 2D Systems |

917 | Magnetic Response of a Twisted Bilayer Graphene Barrier. | Bahamon, Dario; Gomez Santos, Guillermo; Stauber, Tobias | Behind the new phenomena, for low twist angle, we can find the emergence of flat-bands produced by the localization of the electronic wave-function on the AA-stacked regions. | Session 67: Magnetism in 2D Systems |

918 | Magneto intersubband oscillations in twisted double bilayer graphene | Tomić, Petar; De Vries, Folkert; Rickhaus, Peter; Zheng, Giulia; Portoles, Elias; Ihn, Thomas; Ensslin, Klaus | Here we investigate interlayer scattering in twisted double bilayer graphene with an intermediate twist (1.94°) angle. | Session 67: Magnetism in 2D Systems |

919 | Twisted bilayer WSe2 (I): Band topology, Hubbard model, Heisenberg model, and Dzyaloshinskii-Moriya interaction | Pan, Haining; Wu, Fengcheng | We present a theoretical study of single-particle and many-body properties of twisted bilayer WSe 2. | Session 67: Magnetism in 2D Systems |

920 | Magneto-infrared spectroscopy of nonpolar epigraphene | Zhao, Tianhao; Jiang, Yuxuan; Hu, Yiran; Hu, Yue; Nunn, Grant; Ozerov, Mykhaylo; Smirnov, Dmitry; ma, lei; berger, Claire; de Heer, Walter; Jiang, Zhigang | Failing to explain the splittings with electron-hole asymmetry, we suggest that it could arise from the (twist) bilayer epigraphene components, which we will discuss with a numerical twist-bilayer model. | Session 67: Magnetism in 2D Systems |

921 | Control of Giant Orbital Magnetic Moment and Valley Splitting in Bernal Stacked Trilayer Graphene | Ge, Zhehao; Slizovskiy, Sergey; Joucken, Frederic; Quezada, Eberth; Taniguchi, Takashi; Watanabe, Kenji; Falko, Vladimir; Velasco Jr., Jairo | In this talk, I will show our recent scanning tunneling spectroscopy (STS) study of ABA-TLG with magnetic field and back gate modulation. | Session 67: Magnetism in 2D Systems |

922 | Frustrated magnetism in a cyclacene crystal | Ortiz Cano, Ricardo; Sancho-García, Juan Carlos; Fernández-Rossier, Joaquín | We consider a triangular lattice of short carbon nanorings (cyclacenes). | Session 67: Magnetism in 2D Systems |

923 | Magnetoexcitons in Transition-Metal Dichalcogenides Monolayers and Double-Layer Heterostructures | Spiridonova, Anastasia; Kezerashvili, Roman | We calculate the binding energies of 1s, 2s, 3s, and 4s Rydberg states of magnetoexcitons by numerical solution of the Schrödinger equation using both Rytova-Keldysh and Coulomb potentials, and electron and hole masses obtained in the framework of density functional theory. | Session 67: Magnetism in 2D Systems |

924 | Experimental detection of graphene’s singular orbital diamagnetism at the Dirac point. | Vallejo Bustamante, Jorge; Ferrier, Meydi; Gueron, Sophie; Bouchiat, Helene | Experimental detection of graphene’s singular orbital diamagnetism at the Dirac point. | Session 67: Magnetism in 2D Systems |

925 | Strong intervalley scattering in twisted bilayer graphene revealed by high-temperature magnetooscillations | Phinney, Isabelle; Bandurin, Denis; Collignon, Clement; Watanabe, Kenji; Taniguchi, Takashi; Jarillo-Herrero, Pablo | We show that at small twist angles, unlike in monolayer graphene, intervalley electron scattering plays a critical role in momentum relaxation. | Session 67: Magnetism in 2D Systems |

926 | Doping dependence of low-energy band dispersions and magnetic properties of twisted bilayer graphene | Cho, YoSep; Choi, Young Woo; Choi, Hyoung Joon | Here, we present an efficient method to calculate electronic and magnetic properties of electron- and hole-doped TBGs based on results of density functional theory calculations of undoped TBG. | Session 67: Magnetism in 2D Systems |

927 | Visualizing the Quantum Phases of Magic Angle Graphene | Ilani, Shahal | In this talk I will describe our nanotube-based scanning single-electron-transistor (SET) experiments that explore and visualize some of these phases. | Session 68: Manipulation of Strongly Correlated Electronic Ground States by the Competition between the Contact and Long-Range Parts of the Coulomb Interaction |

928 | The role of electron-electron interactions in two-dimensional Dirac fermions: from realistic to toy models. | Assaad, Fakher | In this talk I will review a body of quantum Monte Carlo results aimed at exploring the effect of correlations in Dirac fermions. | Session 68: Manipulation of Strongly Correlated Electronic Ground States by the Competition between the Contact and Long-Range Parts of the Coulomb Interaction |

929 | Phase diagram of twisted graphene bilayers near a magic angle | Guinea, Francisco | Phase diagram of twisted graphene bilayers near a magic angle | Session 68: Manipulation of Strongly Correlated Electronic Ground States by the Competition between the Contact and Long-Range Parts of the Coulomb Interaction |

930 | Critical role of device geometry for the phase diagram of twisted bilayer graphene | Lischner, Johannes | In this talk, I will describe two approaches for understanding the electronic structure of twisted bilayer graphene. | |

931 | Programming Sequences in Multistable Mechanical Metamaterials | Bertoldi, Katia; Zanaty, Mohamed; Van Hecke, Martin | Here, we focus on a model system comprising a 1D array of rigid blocks connected by rigid levers and a linear spring and use a combination of experiments and analyses to study the effect of geometric parameters on the deformation sequences that emerge when the displacement of the top unit is controlled. | Session 69: Memory Formation in Matter: Encoding, Reading, and Design |

932 | Sequential snapping of hysterons in a biholey metamaterial | Ding, Jiangnan; Van Hecke, Martin | We show how to construct metamaterials that exhibit a sequence of actions under monotonic input. | Session 69: Memory Formation in Matter: Encoding, Reading, and Design |

933 | Controlled pathways in corrugated sheets | bense, hadrien; Van Hecke, Martin | Here we introduce mechanical driving of corrugated elastic sheets to precisely observe and manipulate complex, multi-step pathways. | Session 69: Memory Formation in Matter: Encoding, Reading, and Design |

934 | Memory and aging in the cyclic crumpling of a film | Dong, Pan; He, Mengfei; Keim, Nathan; Paulsen, Joseph | Here we study a thin cylindrical shell under cyclic loading. | Session 69: Memory Formation in Matter: Encoding, Reading, and Design |

935 | Encoding, retrieving and erasing mechanical memories in a crumpled sheet | Shohat, Dor; Hexner, Daniel; Lahini, Yoav | We study the behavior of crumpled sheets under cyclic strain. | Session 69: Memory Formation in Matter: Encoding, Reading, and Design |

936 | Non-commuting Mechanical Metamaterials | Singh, Amitesh; Labousse, Matthieu; Van Hecke, Martin | Here, we introduce an elegant solution in the form of non-commuting mechanical metamaterials, which are sensitive to the magnitude as well as the order of inputs. | Session 69: Memory Formation in Matter: Encoding, Reading, and Design |

937 | Topological Memory and Hysteresis in Ice-like Mechanical Metamaterials | Merrigan, Carl; Shokef, Yair; Nisoli, Cristiano | We present a mechanical analogue of artificial spin ice built up from bistable square cells that act as simple mechanical hysterons. | Session 69: Memory Formation in Matter: Encoding, Reading, and Design |

938 | Novel memory formation in interacting hysterons | Lindeman, Chloe; Nagel, Sidney | Novel memory formation in interacting hysterons | Session 69: Memory Formation in Matter: Encoding, Reading, and Design |

939 | Multiperiodic orbits in a model of interacting soft spots in cyclically-sheared amorphous solids | Keim, Nathan; Paulsen, Joseph | We investigate multiperiodicity in a simplified coarse-grained model of soft spots—locations where particles rearrange under stress—and we identify simple routes to multiperiodic behavior. | Session 69: Memory Formation in Matter: Encoding, Reading, and Design |

940 | Cyclic memory in random energy landscapes | Szulc, Asaf; Gat, Omri; Regev, Ido | Here we use a novel simulation algorithm, that uses a sampling technique to simulate deterministic forced dynamics on a Gaussian landscape. | Session 69: Memory Formation in Matter: Encoding, Reading, and Design |

941 | Limits on memory storage in amorphous solids from analysis of transition networks | Regev, Ido; Attia, Ido; Dahmen, Karin; Sastry, Srikanth; Mungan, Muhittin | We analyze the directed graph of plastic transitions obtained by shearing an initial quenched configuration. | Session 69: Memory Formation in Matter: Encoding, Reading, and Design |

942 | Memory in non-orientable mechanics | Guo, Xiaofei; Guzmán, Marcelo; Bartolo, Denis; Carpentier, David; Coulais, Corentin | Here we show that it is possible to achieve non-orientable mechanics in an orientable metamaterial, rotating-square mechanism. | Session 69: Memory Formation in Matter: Encoding, Reading, and Design |

943 | Complex pathways in models of coupled hysterons | Van Hecke, Martin; Korovin, George | Complex pathways in models of coupled hysterons | Session 69: Memory Formation in Matter: Encoding, Reading, and Design |

944 | Random Close Packing as a Dynamical Phase Transition | Wilken, Sam; Guerra, Rodrigo; Levine, Dov; Chaikin, Paul | Here we show that a simple model, “Biased Random Organization”, BRO, exhibits a dynamical phase transition between absorbing (non-overlapping) and active states that appears to have RCP as its critical endpoint. | Session 69: Memory Formation in Matter: Encoding, Reading, and Design |

945 | Correlation Lengths in the Language of Computable Information | Martiniani, Stefano; Lemberg, Yuval; Chaikin, Paul; Levine, Dov | Here we show that correlation lengths can be obtained by decimation, thinning a configuration by sampling data at increasing intervals and recalculating the CID. | Session 69: Memory Formation in Matter: Encoding, Reading, and Design |

946 | Jerky active matter: a phase field crystal model with translational and orientational memory | te Vrugt, Michael; Jeggle, Julian; Wittkowski, Raphael | In this work, we combine modern mathematical methods from particle physics and nonlinear dynamics to derive the general mathematical form of a field theory for soft-matter systems with two different time scales. | Session 69: Memory Formation in Matter: Encoding, Reading, and Design |

947 | Hysteretic dynamics of driven disordered systems provide insights into biological evolution in a changing environment | Das, Suman; Krug, Joachim; Mungan, Muhittin | Specifically, our model can be described as a Preisach system with interacting hysterons, and it exhibits effects of memory such as hysteresis loops under antibiotic concentration cycling. | Session 69: Memory Formation in Matter: Encoding, Reading, and Design |

948 | Memory in 3D Cyclically Driven Granular Matter | Benson, Zackery; Peshkov, Anton; Richardson, Derek; Losert, Wolfgang | We perform experimental and numerical studies of a granular system under cyclic-compression to investigate reversibility and memory effects. | Session 69: Memory Formation in Matter: Encoding, Reading, and Design |

949 | An out-of-equilibrium Gardner-like transition in compressed hard sphere liquids | Morse, Peter; Charbonneau, Patrick | In this talk, we will explore the properties of this dynamical Gardner-like transition–itself is a second form of memory–and its relationship to the aforementioned onset. | Session 69: Memory Formation in Matter: Encoding, Reading, and Design |

950 | New strategies for memory formation and disruption in non-equilibrium materials | Cohen, Itai | Here, I discuss new strategies for creating and destroying memories in three of these systems: gels, suspensions, and shape memory actuators. | Session 69: Memory Formation in Matter: Encoding, Reading, and Design |

951 | Disordered hyperuniformity, memory and information coding in droplet chains. | Guzowski, Jan; Buda, Robert; Bogdan, Michal | We develop a model which predicts that the length of the memory is set by the relaxation time and the frequency of droplet generation, in agreement with observations. | Session 69: Memory Formation in Matter: Encoding, Reading, and Design |

952 | Capturing the local entropy production by data compression | Guo, Buming; Ro, Sunghan; Shih, Aaron; Phan, Trung; Martiniani, Stefano; Levine, Dov; Austin, Robert; Chaikin, Paul | We introduce a universal protocol to estimate local entropy production by data compression. | Session 69: Memory Formation in Matter: Encoding, Reading, and Design |

953 | Topological characterization of memories formed under oscillatory shear | Graham, Ian; Arratia, Paulo; Riggleman, Robert | Here we consider 2D simulations of jammed Hertzian bidisperse particles and subject the samples to athermal quasistatic shear. | Session 69: Memory Formation in Matter: Encoding, Reading, and Design |

954 | The Interplay between Memory Training and Stability in Jammed Solids | Arceri, Francesco; Corwin, Eric; Faghir Hagh, Varda | We perform cyclic shear training on marginally stable and highly stable packings, the latter being produced via a constrained minimization of both positional and radial degrees of freedom. | Session 69: Memory Formation in Matter: Encoding, Reading, and Design |

955 | Characterizing phase transitions in 2D Repulsive Random Organization | Guo, Ashley; Wilken, Sam; Chaikin, Paul; Levine, Dov | Here, we study the random organization model in 2D with the addition of repulsive displacements between particles. | Session 69: Memory Formation in Matter: Encoding, Reading, and Design |

956 | Coherent phonons and the interplay between charge density wave and Mott phases in 1T-TaSe2 | Sayers, Charles; Hedayat, Hamoon; Ceraso, Ariana; Museur, Flavien; Cattelan, Mattia; Hart, Lewis; Farrar, Liam; Dal Conte, Stefano; Cerullo, Giulio; Dallera, Claudia; Da Como, Enrico; Carpene, Ettore | We investigated the CDW-Mott phase in 1 T-TaSe 2 at 77 K using a combination of time- and angle-resolved photoemission spectroscopy (TR-ARPES) and time-resolved reflectivity (TRR) which reveals strong coherent phonon oscillations [1]. | Session 70: Metal-Insulator Phase Transition |

957 | Structural Manipulation of Phase Transitions by Self-induced Strain in Geometrically Confined Thin Films | Kalcheim, Yoav; Adda, Coline; Salev, Pavel; Lee, Minhan; Ghazikhanian, Nareg; Vargas, Nicolas; del Valle, Javier; Navarro, Henry; Schuller, Ivan | We found means of controlling the magnitude of self-strain by modifying substrate morphology. | Session 70: Metal-Insulator Phase Transition |

958 | Unraveling the role of V-V dimer on the vibrational properties of VO2 by first-principles simulations and Raman spectroscopic analysis | Mondal, Wasim; Evlyukhin, Egor; Howard, Sebastian; Paez Fajardo, Galo; Paik, Hanjong; Schlom, Darrell; Piper, Louis; Lee, Wei-Cheng | We perform the structural optimization using SCAN meta-GGA functional and obtain the optimized crystal structures not only with the correct energy hierarchy for the rutile and M1 phases, but also phonon properties in great agreement with previous neutron scattering measurement as well as Raman spectroscopic measurements presented in this work. | Session 70: Metal-Insulator Phase Transition |

959 | Observation of the insulator to metal transition in VO2 by non-contact AFM | Spitzig, Alyson; Arumainayagam, Michael; Guo, Elizabeth; Wang, Xuguang; Yildiz, Dilek; Hoffman, Jason; Hoffman, Jenny | Here we present non-contact atomic force microscopy (nc-AFM) measurements from a VO 2 film grown with oxygen plasma-assisted MBE. | Session 70: Metal-Insulator Phase Transition |

960 | Near-Field Forces and Non-Contact Dissipation in VO2 Films | Guo, Elizabeth; Spitzig, Alyson; Arumainayagam, Michael; Yildiz, Dilek; Hoffman, Jason; Hoffman, Jenny | Two theories can describe how VO 2 undergoes its insulator-to-metal transition (IMT) at 340 K: it may exhibit a Mott transition; or exhibit a Peierls or structural phase transition (SPT) due to electron-phonon interactions. | Session 70: Metal-Insulator Phase Transition |

961 | Simultaneous Structural and Electronic Transitions in Epitaxial VO2/TiO2(001) | Paez Fajardo, Galo; Singh, Christopher; Wahila, Matthew; Tirpak, Keith; Quackenbush, Nicholas; Sallis, Shawn; Paik, Hanjong; Liang, Yufeng; Schlom, Darrell; Schlueter, christoph; Lee, Tien-Lin; Lee, Wei-Cheng; Piper, Louis | Here we will present a temperature dependence study [2] of biaxially stretched, epitaxial VO 2 films grown by molecular beam epitaxy on TiO 2(001) employing x-ray standing waves and hard x-ray photoelectron spectroscopy, which are sensitive to the interplanar distance along the V-V dimer direction and the metallicity of VO 2, respectively. | Session 70: Metal-Insulator Phase Transition |

962 | Real-space cluster dynamical mean-field theory: Center focused extrapolation on the one- and two particle level | Klett, Marcel; Wentzell, Nils; Schaefer, Thomas; Simkovic, Fedor; Parcollet, Olivier; Andergassen, Sabine; Hansmann, Philipp | We revisit the cellular dynamical mean-field theory (CDMFT) for the single band Hubbard model on the square lattice at half filling, reaching real-space cluster sizes of up to 9 x 9 sites. | Session 70: Metal-Insulator Phase Transition |

963 | Filament dynamics in the voltage-driven insulator-to-metal transition | del Valle, Javier; Vargas, Nicolas; Salev, Pavel; Rocco, Rodolfo; Dominguez Ordonez, Claribel; Fowlie, Jennifer; Lapa, Pavel; Kalcheim, Yoav; Adda, Coline; Lee, Minhan; Gariglio, Stefano; Rozenberg, Marcelo; Triscone, Jean-Marc; Schuller, Ivan | We combine reflectivity and transport measurements to image metallization with spatial and temporal resolution. | Session 70: Metal-Insulator Phase Transition |

964 | Joule heating simulations of VO2 films | Arumainayagam, Michael; Spitzig, Alyson; Guo, Elizabeth; Wang, Xuguang; Yildiz, Dilek; Hoffman, Jason; Hoffman, Jenny | Here we present a computational study of Joule heating in a VO 2 film due to CAFM bias sweeps. | Session 70: Metal-Insulator Phase Transition |

965 | Out-of-equilibrium dynamics in a 2D electron system with screened Coulomb interactions | Stanley, Lily; Popovic, Dragana | To address the fundamental question whether glassy behavior of electrons exists in the absence of long-range Coulomb interactions, we studied strongly disordered 2D electrons in thin-oxide Si devices in which the Coulomb interaction is screened by the nearby metallic gate. | Session 70: Metal-Insulator Phase Transition |

966 | Tunneling injection of doublon-like excitations and their coupling to the charge density wave in 1T-TaS2 | Butler, Christopher; Yoshida, Masaro; Hanaguri, Tetsuo; Iwasa, Yoshihiro | Here, we observe the dynamic response to tunneling injection of single electrons, facilitated using a scanning tunneling microscope. | Session 70: Metal-Insulator Phase Transition |

967 | Electron-Phonon Coupled Materials in Nonequilibrium | Nesselrodt, Ryan; Freericks, James | We examine the case of the Holstein model and we present the results for an exact solution of time-resolved ARPES data for phonon mediated charge-density-wave systems. | Session 70: Metal-Insulator Phase Transition |

968 | A Systematic Study of V1-xMoxO2 Correlation Length as a Function of Mo Composition and Temperature | Douglas, Tyra; Davenport, Matthew; Whitt, Logan; Rawot Chhetri, Top; Krogstad, Matthew; Rosenkranz, Stephan; Osborn, Raymond; Allred, Jared | Here, a systematic study of correlation length as a function of both Mo concentration and temperature is presented to better understand the origins of these structural phase transitions. | Session 70: Metal-Insulator Phase Transition |

969 | Fragile 3D Order in V(1-x)MoxO2 | Krogstad, Matthew; Davenport, Matthew; Whitt, Logan; Rosenkranz, Stephan; Osborn, Raymond; Allred, Jared | Electron doping via molybdenum substitution enhances metallicity and reduces the structural transition temperature; between 17% and 19% Mo, we find that the long-range structural transition is suppressed entirely while the electronic transitions remain similar. | Session 70: Metal-Insulator Phase Transition |

970 | Abrupt structural transition in V2O3 revealed by pair distribution function analysis | Fletcher, Ethan; Frandsen, Benjamin; Kageyama, Hiroshi; Higashi, Kentaro | Here, we present comprehensive atomic and magnetic pair distribution function (PDF) analyses of V 2O 3 using both x-ray and neutron total scattering measurements, shedding new light on the mechanism of the transition from the point of view of short-range structural and magnetic correlations on both sides of the transition. | Session 70: Metal-Insulator Phase Transition |

971 | Metal-insulator transitions in complex oxide heterostructures from DFT+DMFT | Beck, Sophie; Ederer, Claude | We study the interplay between several control mechanisms on the emerging functionalities of complex oxide thin films and heterostructures composed in early transition metal oxides using a combination of density functional theory (DFT) and dynamical mean-field theory (DMFT). | Session 70: Metal-Insulator Phase Transition |

972 | Vanadium trimers randomly aligned along the c-axis direction in layered LiVO2 | Kojima, Keita; Katayama, Naoyuki; Tamura, Shinya; Shiomi, Manabu; Sawa, Hiroshi | In this presentation, we will explain that the presence/absence of such a periodicity in the trimer patterns is brought by the difference in their inherent stacking structures. | Session 70: Metal-Insulator Phase Transition |

973 | Role of local temperature in the current-driven metal–insulator transition of Ca2RuO4 | Mattoni, Giordano; Yonezawa, Shingo; Nakamura, Fumihiko; Maeno, Yoshiteru | We present infrared thermal imaging measurements performed on single-crystal Ca 2RuO 4 while controlling the MIT by electric current. | Session 70: Metal-Insulator Phase Transition |

974 | Electric field-driven resistive transitions in correlated CuIr2S4 | Adhikari, Dasharath; Mansaray, Ishiaka; Ali, Ahmed; Han, Jong E; Ganapathy, Sambandamurthy | The electrically-driven transition is studied using electrical transport, resistance noise spectroscopy, and a nonequilibrium free-energy model, where effective temperature of charge carriers is defined as a function of local electric field. | Session 70: Metal-Insulator Phase Transition |

975 | Imaging filamentary current flow near the metal-insulator transition in an oxide interface | Persky, Eylon; Vardi, Naor; Monteiro, Ana; van Thiel, Thierry; Yoon, Hyeok; Xie, Yan-Wu; Fauque, Benoit; Caviglia, Andrea; Hwang, Harold; Behnia, Kamran; Kalisky, Beena | In my talk, I will discuss the scaling properties of the metal-insulator transition at the LaAlO 3/SrTiO 3 interface. | Session 70: Metal-Insulator Phase Transition |

976 | A Machine Learning Model and Database for The Identification of New Metal-Insulator Transition Compounds | Georgescu, Alexandru Bogdan; Ren, Peiwen; Toland, Aubrey; Wagner, Nicholas; Olivetti, Elsa; Rondinelli, James | We have built a database of MIT and stoichiometrically related materials, and trained a machine learning model designed to classify whether a material is an MIT material or not [1]. | Session 70: Metal-Insulator Phase Transition |

977 | Spectral study of the interplay among lattice, spin, and electron degrees of freedom in a strong correlated polar metal | Wang, Huaiyu; Xiong, Yihuang; Padmanabhan, Hari; Min, Lujin; Wang, Yu; Mao, Zhiqiang; Dabo, Ismaila; Gopalan, Venkatraman | Here we demonstrate for the oxide compound Ca 3Ru 2O 7 strong correlation among phononic properties, electron reconstruction, and spin reorientation due to spin-orbital coupling and strong electron-phonon correlation. | Session 70: Metal-Insulator Phase Transition |

978 | Discovery of the soft electronic modes involved in magnetite’s Verwey transition | Belvin, Carina; Baldini, Edoardo; Rodriguez-vega, Martin; Ozel, Ilkem Ozge; Legut, Dominik; Kozlowski, Andrzej; Oles, Andrzej; Parlinski, Krzysztof; Piekarz, Przemyslaw; Lorenzana, Josee; Fiete, Gregory; Gedik, Nuh | In this talk, I will present our discovery of spectroscopic signatures of the low-energy electronic modes of the trimeron network using terahertz light. | Session 70: Metal-Insulator Phase Transition |

979 | The Hubbard model on the Bethe lattice via variational uniform tree states: metal-insulator transition and a Fermi liquid | Lunts, Peter; Georges, Antoine; Stoudenmire, Edwin; Fishman, Matthew | For this purpose, we introduce and develop the `variational uniform tree state’ (VUTS) algorithm, a tensor network (TN) algorithm which generalizes the variational uniform matrix product state algorithm to tree TNs. | Session 70: Metal-Insulator Phase Transition |

980 | Pattern Recognition with Deep Learning in Quantum Materials | Basak, Sayan; Simmons, Forrest; Salev, Pavel; Schuller, Ivan; Aigouy, Lionel; Zimmers, Alexandre; Carlson, Erica | [1] A well-tuned machine learning framework can decipher this information with minimal effort from the user. | Session 70: Metal-Insulator Phase Transition |

981 | Electric Field-Induced Charge Carrier Density Driven Metal-to-Insulator Phase Transition in Few-Layered As-bP Field-effect Transistor | Pradhan, Nihar; Garcia, Carlos; Rosenmann, Daniel; Divan, Ralu; Sumant, Anirudha; Das, Priyanka; Raghavan, Dharmaraj; Karim, Alamgir; McGill, Stephen; Balicas, Luis | We will present a possible MIT in few-layered As-doped black phosphorus from conductivity measurements in field effect transistors measured from 300 K to 2 K reveal an insulating-to-metallic-like phase transition when the carrier density is tuned via an applied gate voltage. | Session 70: Metal-Insulator Phase Transition |

982 | Role of f-electrons in Ca(La1-xCex)2S4 (0 ≤ x ≤ 1) solid solutions: A DFT+U study | Sarker, Hori Pada; Huda, Muhammad | We will present the first principles-based DFT+U study of structural, magnetic, electronic, and optical properties of Ca(La 1-x Ce x) 2S 4 (0 ≤ x ≤ 1) solid solution. | Session 70: Metal-Insulator Phase Transition |

983 | Potential Glassy Behavior at Metal-to-Insulator Transitions in Elastic Media | Liang, Charles; Littlewood, Peter | When randomness is included, we explore whether the combination of long-range coupling and frustration can lead to a glassy phase where the local distortions become frozen. | Session 70: Metal-Insulator Phase Transition |

984 | Changes in phonon dispersion across metal-insulator transition in a Pr-containing cobaltite | Phelan, Daniel; Krogstad, Matthew; Schreiber, Nathaniel; Osborn, Raymond; Said, Ayman; Zheng, Hong; Rosenkranz, Stephan | We have measured the dispersion of acoustic phonons in a single crystal of (Pr 0.85Y 0.15) 0.7Ca 0.3CoO 3-δ in both the metallic and insulating states and have observed differences which arise at the phase transition temperature. | Session 70: Metal-Insulator Phase Transition |

985 | Local fluctuations in the metal-insulator transition | Villagran, Martha; Mitsakos, Nikolaos; Lee, Tsung-Han; Dobrosavljevic, Vladimir; Miller, John; Miranda, Eduardo | We performed an analysis of finite-size effects and showed that the first-order transition is smeared in the thermodynamic limit. | Session 70: Metal-Insulator Phase Transition |

986 | Coulomb correlation in noncollinear antiferromagnetic α-Mn | Barbiellini, Bernardo; Pulkkinen, Aki; Nokelainen, Johannes; Sokolovskiy, Vladimir; Baigutlin, Danil; Miroshkina, Olga; Zagrebin, Mikhail; Buchelnikov, Vasiliy; Lane, Christopher; Markiewicz, Robert; Bansil, Arun; Sun, Jianwei; Pussi, Katariina; Lähderanta, Erkki | We discuss the interplay between magnetic and structural degrees of freedom in elemental Mn. | Session 71: Metals: Functional and Actinides |

987 | Intermediate Valence Behavior of Yb2Cu9Al8 | Juckel, Martin; Kozelj, Primoz; Ormeci, Alim; Svanidze, Eteri; Leithe-Jasper, Andreas; Prots, Yurii; Burkhardt, Ulrich | In the current talk, I will discuss synthesis and characterization of an intermetallic compound Yb 2Cu 9Al 8 which crystallizes in the Th 2Zn 17 structure type. | Session 71: Metals: Functional and Actinides |

988 | A scattering framework for linear magnetoresistance when the mean free path exceeds the length scale of disorder | Boyd, Christian; Phillips, Philip | It is precisely this latter regime which we investigate from a diagrammatic repeated-scattering framework in order to clarify the mechanism of linear magnetoresistance in disordered conductors beyond a classical framework. | Session 71: Metals: Functional and Actinides |

989 | Accelerating the discovery of bimetallic materials for sensing applications via DFT and ML | Rehan, Abdul Qadeer; Kent, Robert; Kreider, Molly Kate; Bezerra, Anibal; Rebello, Mariama | Alternatively, simulation and modeling methods have enabled the expansion of databases that cover the calculated properties of known and hypothetical systems. | Session 71: Metals: Functional and Actinides |

990 | Investigating Heritage Old Copper Culture using X-ray Techniques | Koker, Margaret; Niederriter, Gretchen; Giglio, Quinten | By recreating these thermal and mechanical processes on copper deposits, we seek to characterize copper specimens from the Old Copper Culture collection based on origin and refinement techniques, as well as answer questions about early technological advances in metals processing such as smelting, using non-destructive x-ray analysis methods. | Session 71: Metals: Functional and Actinides |

991 | PdRuIr Ternary alloy as an Effective NO Reduction Catalyst: Insights from First Principles Calculation | Aspera, Susan; Arevalo, Ryan; Nakanishi, Hiroshi; Kasai, Hideaki | In this study, we used first principles calculation based on density functional theory to analyze NO interaction and dissociation on the ternary alloy PdRuIr. | Session 71: Metals: Functional and Actinides |

992 | Controlling properties by chemistry in doped shape memory alloys | Zarkevich, Nikolai; Benafan, Othmane; Lawson, John | Using theoretical and computational methods, we investigate correlations between the selected properties and composition in doped NiTi-based shape memory alloys. | Session 71: Metals: Functional and Actinides |

993 | Plasmon-related electric effects in various plasmonic materials | Keene, David; Shahabuddin, Mohammad; Ronur Praful, Tejaswini; Durach, Maxim; Noginova, Natalia | In our work, we consider these factors and theoretically estimate effective plasmonic pressure (associated with momentum transfer) and pondermotive forces acting on free carriers, in several plasmonic materials such as silver, gold, copper, aluminum, permalloy, and titanium nitride. | Session 71: Metals: Functional and Actinides |

994 | Itinerant ferromagnetism mediated by giant spin polarization of metallic ligand band in van der Waals magnet Fe5GeTe2 | Yamagami, Kohei; Fujisawa, Yuita; Driesen, Benjamin; Hsu, Chia-Hsiu; Kawaguchi, Kaisyu; Tanaka, Hiroki; Kondo, Takeshi; Zhang, Yujun; Wadati, Hiroki; Araki, Kosei; Takeda, Takahito; Takeda, Yukiharu; Muro, Takayuki; Chuang, Feng-chuan; Niimi, Yasuhiro; Kuroda, Kenta; Kobayashi, Masaki; Okada, Yoshinori | In this study, we focused on vdW ferromagnetic metals at room-temperature Fe 5GeTe 2[3] and investigated element-specific electronic states by soft X-ray angle-resolved photoemission spectroscopy (SX-ARPES) and soft X-ray magnetic circular dichroism (XMCD). | Session 71: Metals: Functional and Actinides |

995 | Antiferromagnetic ordering and 5f-electron localization in metallic PuPdSn | Gofryk, Krzysztof; Griveau, Jean-Christophe; Colineau, Eric; Caciuffo, Roberto; Smith, James | Here we present our detailed studies on the structural, magnetic, thermal, and transport properties of PuPdSn. | Session 71: Metals: Functional and Actinides |

996 | Magnetic, transport and thermal properties of δ-phase UZr2 | Ding, Xiaxin; Wei, Kaya; Hua, Zilong; Marianetti, Chris; Baumbach, Ryan; Hurley, David; Gofryk, Krzysztof | Magnetic, transport and thermal properties of δ-phase UZr2 | Session 71: Metals: Functional and Actinides |

997 | Magnetoelectronic and optical properties of CoMnZnSi quaternary Heusler alloy | Paudel, Ramesh; Kaphle, Gopi; Zhu, Jing-Chuan; Paudyal, Durga | Magnetoelectronic and optical properties of CoMnZnSi quaternary Heusler alloy | Session 71: Metals: Functional and Actinides |

998 | Thermodynamic and surface properties of Al–Li–Mg liquid alloy | Dhungana, Arjun; Yadav, Shashit Kumar; Adhikari, Devendra | Thermodynamic and surface properties of Al–Li–Mg liquid alloy | Session 71: Metals: Functional and Actinides |

999 | Non-local microwave electrodynamics in PdCoO2 | Baker, Graham; Day, James; Khim, Seunghyun; Oudah, Mohamed; Moessner, Roderich; Schmalian, Joerg; Mackenzie, Andrew; Bonn, Douglas | Here we present AC microwave spectroscopy measurements in two geometries for which, from the symmetry of the crystallographic lattice, one would conventionally expect the same result. | Session 71: Metals: Functional and Actinides |

1000 | Resonant inelastic x-ray spectroscopy (RIXS) on UO2 – a test case for actinide materials | Sundermann, Martin; Lander, Gerard; Springell, Ross; Walters, Andrew; Nag, Abhishek; Garcia-Fernnandez, Mirian; Zhou, Ke-jin; Van der Laan, Gerrit; Caciuffo, Roberto | Resonant inelastic x-ray spectroscopy (RIXS) on UO2 – a test case for actinide materials | Session 71: Metals: Functional and Actinides |