# Highlights of Condensed Matter Physics (DCMP) Talks @ APS 2020 March Meeting (1)

American Physics Society (APS) March meeting is one of the largest physics meetings in the world. In 2020, the meeting was canceled due to concerns over the rapid spread of 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 | Designing nano-biocomposite materials using CVD grown CNTs and ZnO nanostructures for hybrid interfaces and hydrogel environments with future biomedical applications | Schaper, Nicholas; Hutchinson, Brannan; Zustiak, Silviya; Kuljanishvili, Irma | Here we investigate CVD-grown CNTs, ZnO NWs and CNTs/ZnO hybrid structures interfaced with hydrogels. | Session 1: 1D Materials: Nanowires, Nanotubes, and Nanoribbons |

2 | Unfolding the temperature induced dual bandgap in TiO2 nanotubes with improved photocatalytic application | Bhowmick, Sangita; Saini, Chetan; Khan, Saif; Gupta, Mukul; Singhal, Rahul; Sen, Raja; Kanjilal, Aloke | Here, we report the efficacy of dual-phase mediated bandgap modulation and the subsequent improvement of photocatalytic activity of TiO2 nanotubes as a function of temperature by various complementary techniques like UV-Vis, XRD, XPS, XAS, Raman, etc. and supported by DFT calculations. | Session 1: 1D Materials: Nanowires, Nanotubes, and Nanoribbons |

3 | Modulation Doping of Template-Defined InGaAs Nanowires | Cerveny, Kristopher; Friedl, Martin; Samani, Mohammad; Dede, Didem; Huang, Chunyi; Lauhon, Lincoln; Fontcuberta i Morral, Anna; Zumbuhl, Dominik | We investigate modulation doping in GaAs nanomembranes grown via molecular beam epitaxy in a selective area growth approach. | Session 1: 1D Materials: Nanowires, Nanotubes, and Nanoribbons |

4 | Reflection of light from gold coated InP NW arrays | Tu, ChiaWei; Gao, Qian; Tan, Hoe; Jagadish, Chennupati; Kaveh, Masoud; Schmitzer, Heidrun; Fraenzl, Martin; Wagner, Hans-Peter | To optimize light coupling into a plasmonic nanowire (NW) array as a function of incident angle and excitation wavelength, we investigated the reflection of light from two different bare and gold coated InP NW arrays. | Session 1: 1D Materials: Nanowires, Nanotubes, and Nanoribbons |

5 | Enhanced Dresselhaus spin-orbit interaction in low-symmetry nanowires | Carballido, Miguel; Kloeffel, Christoph; Zumbuhl, Dominik; Loss, Daniel | We present qualitative and quantitative results for low-symmetry NW cross-sections modeled after sectors of rings or circles. | Session 1: 1D Materials: Nanowires, Nanotubes, and Nanoribbons |

6 | Investigating the magneto-optics in quantum wires for designing the optical amplifiers | Kushwaha, Manvir | This paper aims at a core issue related with the magnetoplasmon excitations in the quantum wires characterized by the confining harmonic potential and subjected to a longitudinal electric field and a perpendicular magnetic field in the symmetric gauge. | Session 1: 1D Materials: Nanowires, Nanotubes, and Nanoribbons |

7 | Mid-infrared photoconductivity of tellurium nanowire devices | Li, Pengke; Appelbaum, Ian | Here, we present photocurrent spectroscopy of single tellurium nanowire devices in the mid-infrared range close to the band gap, demonstrating interesting anisotropic features closely related to the linear polarization of the incident light and the resonant modes of the nanowires. | Session 1: 1D Materials: Nanowires, Nanotubes, and Nanoribbons |

8 | Quantum confinement and edge effects in zigzag green phosphorene nanoribbons | Ma, Chi; Ma, Tianxing; Peng, Xihong | Quantum confinement and edge effects in zigzag green phosphorene nanoribbons | Session 1: 1D Materials: Nanowires, Nanotubes, and Nanoribbons |

9 | Lifetime analysis of quasistationary states of an electron in open quantum wires | Jao, Ruei-Fu; Hsu, Hua-Yi; Lin, Ming-Chieh | Here, we solve the eigenvalue equations for the quasibound states of an electron in open quantum wires using the adaptive finite element method (FEM). | Session 1: 1D Materials: Nanowires, Nanotubes, and Nanoribbons |

10 | Distinct magneto-Raman signatures of spin-flip phase transitions in CrI3 | McCreary, Amber; Mai, Thuc; Utermohlen, Franz; Simpson, Jeffrey; Garrity, Kevin; Feng, Xiaozhou; Shcherbakov, Dmitry; Zhu, Yanglin; Hu, Jin; Weber, Daniel; Watanabe, Kenji; Taniguchi, Takashi; Goldberger, Joshua; Mao, Zhiqiang; Lau, Chun Ning; Lu, Yuanming; Trivedi, Nandini; Valdes Aguilar, Rolando; Hight Walker, Angela | We observe a striking evolution of the Raman spectra with increasing magnetic field in which clear, sudden changes in intensities of the modes are attributed to the interlayer ordering changing from antiferromagnetic to ferromagnetic at a critical magnetic field. | Session 2: 2D Magnetic Materials |

11 | Probing Tunneling Magnetoresistances in Chromium Trihalide Junctions via First Principles Calculations | Heath, Jonathan; Kuroda, Marcelo | Here we characterize physical properties of multilayer chromium trihalide/graphene junctions using density functional theory (DFT) and Landauer’s formalism for ballistic transport. | Session 2: 2D Magnetic Materials |

12 | Optically probing low energy magnetic excitations in bilayer CrI3 | Xie, Hongchao; Ye, Zhipeng; Tian, Shangjie; Lei, Hechang; He, Rui; Zhao, Liuyan | Study of spin waves, collective magnetic excitations, in two-dimensional (2D) magnets emerges as one key yet new topic in the research of 2D magnetism. | Session 2: 2D Magnetic Materials |

13 | Current Control of Magnetism in Two-Dimensional Fe3GeTe2 | Brataas, Arne | We investigate how a current can control the ferromagnetic properties of such materials. | Session 2: 2D Magnetic Materials |

14 | Enhanced magnetoresistance in mixed van der Waals magnetic tunnel junctions | Klein, Dahlia; MacNeill, David; Tschudin, Märta; Watanabe, Kenji; Taniguchi, Takashi; Jarillo-Herrero, Pablo | Studies have demonstrated large tunneling magnetoresistances in van der Waals magnetic tunnel junctions fabricated from the insulating layered chromium trihalides (CrX 3) due to the spin filter effect. | Session 2: 2D Magnetic Materials |

15 | Hall micromagnetometry of two-dimensional ferromagnets | Kim, Minsoo; Kumaravadivel, Piranavan; Birkbeck, John; Kuang, Wenjun; Xu, Shuigang; Hopkinson, David; Knolle, Johannes; McClarty, Paul; Berdyugin, Alexey; Ben Shalom, Moshe; Gorbatchev, Roman; Haigh, Sarah; Liu, Song; Edgar, James; Novoselov, Konstantin; Grigorieva, Irina; Geim, Andre | Here we show that ballistic Hall micromagnetometry provides a reliable and convenient way to measure magnetization of individual two-dimensional ferromagnets. | Session 2: 2D Magnetic Materials |

16 | The quantum non-Heisenberg nature of two-dimensional CrI3 magnets | Santos, Elton; Wahab, Dina; Augustin, Mathias; Mañas-Valero, Samuel; Kuang, Wenjun; Jenkins, Sarah; Coronado, Eugenio; Grigorieva, Irina; Vera Marun, Ivan; Navarro-Moratalla, Efren; Evans, Richard; Novoselov, Kostya | We find that biquadratic exchange interactions are essential to quantitatively describe the magnetism of CrI 3 but requiring quantum scaling corrections to reproduce its thermal properties. | Session 2: 2D Magnetic Materials |

17 | Substrate-assisted asymmetric electronic gap in artificial magnetic honeycomb lattice | Guo, Jiasen; Chen, Yiyao; Yumnam, George; Cunningham, Quinn; Singh, Deepak | Substrate-assisted asymmetric electronic gap in artificial magnetic honeycomb lattice | Session 2: 2D Magnetic Materials |

18 | Magneto-Raman study of the Neel-type Antiferromagnet MnPSe3 | Mai, Thuc; Argo, Joshua; McCreary, Amber; Valdes Aguilar, Rolando; Doan-Nguyen, Vicky; Hight Walker, Angela | We perform a systematic magneto-Raman study of MnPSe 3. | Session 2: 2D Magnetic Materials |

19 | Magnetic structure determination of transition metal dichalcogenide Fe1/3NbS2 | Wu, Shan; Xu, Zhijun; Maniv, Eran; Acharya, Arani; Doyle, Spencer; John, Caolan; Analytis, James; Birgeneau, Robert | From neutron diffraction experiment,we determined a stripe-type order that develops into three magnetic domains, which is strongly coupled to three nematic domains. | Session 2: 2D Magnetic Materials |

20 | Magnetic interactions and excitations in magnetic 2D van der Waals materials | Ke, Liqin | Using linear-response ab initio methods, we investigate the magnetic interactions and spin excitations in various m2DvdW systems. | Session 2: 2D Magnetic Materials |

21 | Is 2H-MoTe2 an intrinsically magnetic semiconductor? | Krieger, Jonas; Guguchia, Zurab; Shiroka, Toni; Prokscha, Thomas; Suter, Andreas; Strokov, Vladimir; Salman, Zaher | Here we present results of complementary spectroscopic techniques to elucidate the nature and origin of the reported magnetic order. | Session 2: 2D Magnetic Materials |

22 | Patterning-induced ferromagnetism of Fe3GeTe2 van der Waals materials beyond room temperature | Yang, Mengmeng; Li, Qian; Gong, Cheng; Chopdekar, Rajesh; N’Diaye, Alpha; Turner, John; Chen, Gong; Scholl, Andreas; Shafer, Padraic; Arenholz, Elke; Schmid, Andreas; Wang, Sheng; Liu, Kai; Gao, Nan; Admasu, Alemayehu; Cheong, Sang-Wook; Hwang, Chanyong; Li, Jia; Wang, Feng; Zhang, Xiang; Qiu, Zi Q. | Here we report a real space imaging study of itinerant ferromagnet Fe 3GeTe 2 and the enhancement of its Curie temperature well above ambient temperature. | Session 2: 2D Magnetic Materials |

23 | Observation of flat bands and singularity collapse in back-gated semiconductor artificial graphene | Du, Lingjie; Liu, Ziyu; Pfeiffer, Loren; Manfra, Michael; Pinczuk, Aron | We find that the doublets in PL persist for a large range of electron densities, suggesting a pinning of the Fermi energy in a flat band. | Session 3: 2D Materials: Graphene and Transition Metal Dichalcogenides |

24 | First-principle Studies of Flexoelectric Effect in Corrugated Two-dimensional Materials | Jin, Yeongrok; Lee, Jaekwang | Here, combining density functional theory calculation and mathematical analysis, we find that the corrugation generates the great out-of-plane polarization mediated by the flexoelectric effect even in centrosymmetric two-dimensional materials. | Session 3: 2D Materials: Graphene and Transition Metal Dichalcogenides |

25 | Electronically Engineered Nanoporous Graphene | Jacobse, Peter; McCurdy, Ryan; Rizzo, Daniel; Jiang, Jingwei; Butler, Paul; Veber, Gregory; Louie, Steven; Fischer, Felix; Crommie, Michael | Here we present a new methodology for creating covalently connected, fully conjugated two-dimensional graphene structures through the utilization of cyclopentadiene (CP) moieties. | Session 3: 2D Materials: Graphene and Transition Metal Dichalcogenides |

26 | Band structure engineering of 2D materials using 1D superlattice | Li, Yutao; Dietrich, Scott; Forsythe, Carlos; Chen, Shaowen; Taniguchi, Takashi; Watanabe, Kenji; Hone, James; Dean, Cory | We exploit our recently developed technique of dielectric superlattices to pattern graphene with a 1D superlattice potential with periodicity as low as 47nm. | Session 3: 2D Materials: Graphene and Transition Metal Dichalcogenides |

27 | Periodic strain-induced magnetization in graphene over NbSe2 | Manesco, Antonio; Lado, Jose; Ribeiro, Eduardo; Weber, Gabrielle; Rodrigues Jr., Durval | Motivated by recent experiments, here we explore the emergence of a periodic-modulated magnetization caused by epitaxial-induced strain in graphene stemming from a NbSe2 substrate. | Session 3: 2D Materials: Graphene and Transition Metal Dichalcogenides |

28 | Strain tunable magnetotransport study of ABC trilayer graphene/h-BN moiré superlattices | Liu, Chuankun; Tsuchikawa, Ryuichi; Berg, Jameson; Deshpande, Vikram | We study the responses of low energy bands by performing magnetotransport measurements at low temperatures. | Session 3: 2D Materials: Graphene and Transition Metal Dichalcogenides |

29 | Interaction-driven broken symmetry states in moiré vdWs heterostructure | Zheng, Zhiren; Dinh, Thao; Watanabe, Kenji; Taniguchi, Takashi; Xu, Suyang; Gedik, Nuh; Ma, Qiong; Jarillo-Herrero, Pablo | Here, we report on our design and experimental exploration of a multiferroic system based on moiré vdW heterostructures. | Session 3: 2D Materials: Graphene and Transition Metal Dichalcogenides |

30 | Optical study of electric field tunable 2D semiconductor moiré superlattices | Li, Lizhong; Tang, Yanhao; Mak, Kin Fai; Shan, Jie | In this talk, I will discuss our recent optical study on electric field tunable TMD moiré superlattices and the search for novel quantum phases of matter. | Session 3: 2D Materials: Graphene and Transition Metal Dichalcogenides |

31 | Charge transfer in transition metal dichalcogenide superlattices and moiré quantum chemistry | Zhang, Yang; Yuan, Noah; Fu, Liang | We theoretically investigate the band structure and interaction effects in moiré superlattices of transition metal dichalcogenides and find the Mott and charge-transfer insulating phases around half filling. | Session 3: 2D Materials: Graphene and Transition Metal Dichalcogenides |

32 | Stokes spectroscopy applied to monolayer MoS2 photoluminescence at room temperature; different helicities observed for A-exciton and A-trion | Zolghadr, Ehsan; Garg, Sourav; Kung, Patrick; Barbosa Neto, Newton; Araujo, Paulo | Here, we present our investigation of room temperature Stokes spectroscopy applied to the photoluminescence emitted by a large-area MoS 2 monolayer grown by CVD technique standing on a SiO 2 substrate. | Session 3: 2D Materials: Graphene and Transition Metal Dichalcogenides |

33 | Studying Transition Metal Dichalcogenide Superlattices with nano-ARPES | Stansbury, Conrad; Utama, Iqbal; Fatuzzo, Claudia; Jozwiak, Chris; Bostwick, Aaron; Avila, José; Rotenberg, Eli; Wang, Feng; Lanzara, Alessandra | In this talk, I show how this technique can address basic questions of electronic and structural order in a few model systems: heterobilayer interfaces, and in the interface of TMD monolayers with a substrate. | Session 3: 2D Materials: Graphene and Transition Metal Dichalcogenides |

34 | Tip-enhanced nano-imaging of 2D alloy with gradual concentration profile | Hrim, Hana; Ambardar, Sharad; Voronine, Dmitri | We demonstrate nano-optical imaging using tip-enhanced photoluminescence (TEPL) as a function of the composition x for obtaining the higher spatial resolution beyond the diffraction limit. | Session 3: 2D Materials: Graphene and Transition Metal Dichalcogenides |

35 | Clean 2D superconductivity in a bulk van der Waals superlattice | Devarakonda, Aravind; Inoue, Hisashi; Fang, Shiang; Ozsoy Keskinbora, Cigdem; Suzuki, Takehito; Kriener, Markus; Fu, Liang; Kaxiras, Efthimios; Bell, David; Checkelsky, Joseph | Here, we report experimental evidence for a possible solution in the form of a bulk single crystal, van der Waals superlattice that simultaneously exhibits high cleanliness and two-dimensional superconductivity. | Session 3: 2D Materials: Graphene and Transition Metal Dichalcogenides |

36 | Algorithm on the absolute formation energy of edges in transition metal dichalcogenides | Sin, Chuen Keung; Zhu, Junyi | To solve the fundamental problem, we proposed a new calculation scheme to calculate the formation energy of edges in monolayer MoS 2. | Session 3: 2D Materials: Graphene and Transition Metal Dichalcogenides |

37 | Tunable correlated insulator behavior in twisted double bilayer graphene | de la Barrera, Sergio; Aronson, Samuel; Cao, Yuan; Rodan-Legrain, Daniel; Rubies-Bigorda, Oriol; Jarillo-Herrero, Pablo; Ashoori, Raymond | Here, we explore the detailed evolution of these features in the electronic structure via sensitive measurements of the electronic compressibility. | Session 4: 2D Materials: Twisted Bilayers |

38 | Ferromagnetism and its stability from the one-magnon spectrum in twisted bilayer graphene | Alavirad, Yahya; Sau, Jay | We study ferromagnetism and its stability in twisted bilayer graphene. | Session 4: 2D Materials: Twisted Bilayers |

39 | Recovery of massless Dirac fermions at charge neutrality in strongly interacting twisted bilayer graphene with disorder | Thomson, Alex; Alicea, Jason | We propose that the interplay between interactions and disorder admits either behavior, even when the system is strongly correlated and locally gapped. | Session 4: 2D Materials: Twisted Bilayers |

40 | Evolution of charge modulation in twisted bilayer graphene near the magic angle | Lai, Xinyuan; Tilak, Nikhil; Jiang, Yuhang; Mao, Jinhai; Xu, Mingyu; Ribeiro, Raquel; Canfield, Paul; Andrei, Eva | Using STM on magic-angle twisted bilayer graphene with a gate tunable doping dependence, we study the evolution of the band structure with doping and its effect on the charge ordered state. | Session 4: 2D Materials: Twisted Bilayers |

41 | Magic continuum in twisted bilayer WSe2: Mott state and superconductivity | Wang, Lei; Shih, En-Min; Ghiotto, Augusto; Xian, Lede; Rhodes, Daniel; Tan, Cheng; Claassen, Martin; Kennes, Dante; Bai, Yusong; kim, Bumho; Watanabe, Kenji; Taniguchi, Takashi; Zhu, Xiaoyang; Hone, James; Rubio, Angel; Pasupathy, Abhay; Dean, Cory | Unlike twisted bilayer graphene where the flat band appears only within a narrow range around a “magic angle", we observe correlated states over a continuum of angles, spanning 4° to 5.1°. | Session 4: 2D Materials: Twisted Bilayers |

42 | Magic continuum in twisted bilayer WSe2: Correlated states under high magnetic field | Shih, En-Min; Wang, Lei; Ghiotto, Augusto; Xian, Lede; Rhodes, Daniel; Tan, Cheng; Claassen, Martin; Kennes, Dante; Bai, Yusong; kim, Bumho; Watanabe, Kenji; Taniguchi, Takashi; Zhu, Xiaoyang; Hone, James; Rubio, Angel; Pasupathy, Abhay; Dean, Cory | We observed that a Mott- like insulator appears at half band filling that can be sensitively tuned with displacement field over a continuum of angles, spanning 4° to 5.1°. | Session 4: 2D Materials: Twisted Bilayers |

43 | Magic continuum in twisted bilayer WSe2: critical phenomena and phase transitions | Ghiotto, Augusto; Wang, Lei; Shih, En-Min; Xian, Lede; Rhodes, Daniel; Tan, Cheng; Claassen, Martin; Kennes, Dante; kim, Bumho; Bai, Yusong; Watanabe, Kenji; Taniguchi, Takashi; Zhu, Xiaoyang; Hone, James; Rubio, Angel; Dean, Cory; Pasupathy, Abhay | This talk will focus on the critical phenomena and phase transitions in this system in an attempt to convey the uniqueness of its quantum phases. | Session 4: 2D Materials: Twisted Bilayers |

44 | Designing quantum geometry and nonlinear responses in van der Waals homostackings | Shen, Huitao; Zhang, Yang; Xu, Suyang; Fu, Liang | In this talk, I will show that van der Waals (vdW) homostackings can be used to very effectively design the quantum geometry and nonlinear or nonreciprocal responses of many vdW materials. | Session 4: 2D Materials: Twisted Bilayers |

45 | Moire Physics of Twisted Bilayers from the Fourier Transforms of Two-Center Amplitudes | Smith, Andrew; Xiao, Di | Applied with a first-order gradient expansion of the strain fields, we evaluate this continuum model approach in relation to commensurate band structure calculations for a variety of appropriate Van-der Waals bilayer structures. | Session 4: 2D Materials: Twisted Bilayers |

46 | Phonons in Twisted Transition Metal Dichalcogenide Bilayers (“Twistnonics”): Ultra-soft Phasons, and a transition from Superlubric to Pinned Phase | Maity, Indrajit; Naik, Mit; Maiti, Prabal; Ramaswamy, Sriram; Krishnamurthy, Hulikal; Jain, Manish | We study the effects of twisting on low-frequency shear (SM) and layer breathing (LBM) modes in transition metal dichalcogenide (TMD) bilayer using atomistic classical simulations. | Session 4: 2D Materials: Twisted Bilayers |

47 | Particle-Hole Duality, Emergent Fermi Liquids and Fractional Chern Insulators in Moiré Flatbands | Abouelkomsan, Ahmed; Liu, Zhao; Bergholtz, Emil | We consider the core problem of Coulomb interactions within fractionally filled Moiré flat bands and demonstrate that the dual description in terms of holes, which acquire a non-trivial hole-dispersion, provides key physical intuition and enables the use of standard perturbative techniques for this strongly correlated problem. | Session 4: 2D Materials: Twisted Bilayers |

48 | Valley Jahn-Teller effect in Twisted Bilayer Graphene | Angeli, Mattia; Tosatti, Erio; Fabrizio, Michele | We found that, among the 33492 phonons of a fully relaxed θ=1.08° twisted bilayer, there are few special, hard, and nearly dispersionless modes that resemble global vibrations of the moiré supercell (‘moiré phonons’). | Session 4: 2D Materials: Twisted Bilayers |

49 | Electron pairing instability in magic angle twisted bilayer graphene | Xie, Ming; Macdonald, Allan | Here we make an unbiased assessment of different pairing models, taking both Coulomb interactions and effective interactions induced by electron-phonon coupling into account. | Session 4: 2D Materials: Twisted Bilayers |

50 | Electronic structure and ferroelectricity of multiferroic Lu0.5Sc0.5FeO3 | Kim, Jeong Kyu; Kim, Bongjae; Kim, Donghwan; Kim, Kyoo; Kim, Younghak; Wang, Yazhong; Cheong, Sang-Wook; Park, Jae-Hoon; Ko, Kyung-Tae | We investigated the electronic structure of a multiferroic Lu 0.5Sc 0.5FeO 3 single crystal using x-ray absoprtion spectroscopy, cluster model calculation, and ab initio analysis. | Session 5: 5d/4d Transition Metal Systems |

51 | Competing magnetic orders and anisotropic transport in quantum critical Sr3Ru2O7 | Putatunda, Aditya; Qin, Guanhua; Ren, Wei; Singh, David | We investigated Sr 3Ru 2O 7, the classic example of a quantum critical metal known to show a metamagnetic quantum phase transition as well as electronic nematicity, through first-principles calculations. | Session 5: 5d/4d Transition Metal Systems |

52 | Dynamical simulation of spin-orbit insulator and application to bilayer iridate | Suwa, Hidemaro; Chern, Gia-Wei; Barros, Kipton; Batista, Cristian | We have developed a new numerical approach that enables large-scale numerical simulations (on finite lattices of more than 10,000 sites) of dynamical correlation functions at finite temperatures in a broad range of U/t values. | Session 5: 5d/4d Transition Metal Systems |

53 | Infrared Spectroscopic Study on Doping Evolution of the Electronic Response of Sr3(Ir1-xRux)2O7 | Ahn, Gihyeon; Schmehr, Julian; Wilson, Stephen; Moon, Soonjae | We investigate the electronic response of the spin-orbit-coupled Sr 3(Ir 1-xRu x) 2O 7 system over a wide doping range by using infrared spectroscopy. | Session 5: 5d/4d Transition Metal Systems |

54 | Temperautre dependence of the low-energy electronic structure of Ca3Ru2O7 | Markovic, Igor; Watson, Matthew; Clark, Oliver; Mazzola, Federico; Abarca Morales, Edgar; Sokolov, Dmitry; Mackenzie, Andrew P.; King, Phil | We use angular-resolved photoemission spectroscopy (ARPES) and ab initio calculations to study the low-energy electronic band structure of a bilayer ruthenate system, Ca 3Ru 2O 7, across a wide temperature range. | Session 5: 5d/4d Transition Metal Systems |

55 | Hydrodynamic electron flow in PdCoO2: in-plane microwave spectroscopy | Day, James; Baker, Graham; Khim, Seunghyun; Mackenzie, Andrew; Bonn, Douglas | Here we report results of microwave spectroscopy measurements of PdCoO 2 aimed at testing these predictions. | Session 5: 5d/4d Transition Metal Systems |

56 | Hydrodynamic electron flow in PdCoO2: out-of-plane microwave spectroscopy | Baker, Graham; Day, James; Khim, Seunghyun; Mackenzie, Andrew; Bonn, Douglas | Here we report results of microwave spectroscopy measurements of PdCoO 2 aimed at testing these predictions. | Session 5: 5d/4d Transition Metal Systems |

57 | Suppression of ferromagnetic spin correlation in the filled skutterudite superconductor SrOs4As12 revealed by 75As NQR-NMR | Furukawa, Yuji; Ding, Qing Ping; Nishine, K; Hayashi, Jun-ichi; Kawamura, Yukihiro; Sekine, Chihiro | From the temperature dependence of Knight shift K and nuclear spin lattice relaxation time T 1, we found that no obvious ferromagnetic spin correlations in SrOs 4As 12. | Session 5: 5d/4d Transition Metal Systems |

58 | First Principles Studies of Fe-intercalated $\mathrm{NbS_2}$ | Weber, Sophie; Neaton, Jeffrey | To shed light on these findings, we examine the ground state structure and magnetic properties of $\mathrm{Fe_{1/3}NbS_2}$ using density functional theory calculations. | Session 5: 5d/4d Transition Metal Systems |

59 | Theory of magneto-elastoresistance and application to WTe2: exploring electronic structure and extremely large magnetoresistance under strain | Orth, Peter; Jo, Na Hyun; Wang, Lin-Lin; Bud’ko, Sergey; Canfield, Paul | We apply this powerful approach to study the combined effect of strain and magnetic fields on the semi-metallic transition metal dichalcogenide WTe 2, and discover a large and temperature non-monotonic elastoresistance (ER) that can be tuned by magnetic field. | Session 5: 5d/4d Transition Metal Systems |

60 | Photoelectrical imaging and coherent spin-state readout of single nitrogen-vacancy centers in diamond | Jelezko, Fedor | Photoelectrical imaging and coherent spin-state readout of single nitrogen-vacancy centers in diamond | Session 5: 5d/4d Transition Metal Systems |

61 | Nonequilibrium Orbital Transitions via Applied Electrical Current in Calcium Ruthenate | Hu, Bing; Zhao, Hengdi; Ye, Feng; Hoffmann, Christina; Kimchi, Itamar; Cao, Gang | Studying the spin-orbit-coupled antiferromagnet Ca 2RuO 4, and its derivative with 3% Mn doping to alleviate the violent first-order transition for more robust measurements, we find that a small applied electrical current couples to the lattice by significantly reducing its orthorhombicity and octahedral rotations, concurrently diminishing the 125K antiferromagnetic transition and inducing a new orbital order below 80K. | Session 5: 5d/4d Transition Metal Systems |

62 | Quantum liquid from strange frustration in the trimer magnet Ba4Ir3O10 | Zheng, Hao; Zhao, Hengdi; Ni, Yifei; Pocs, Christopher; Zhang, Yu; Ye, Feng; Hoffmann, Christina; Wang, Xiaoping; Lee, Minhyea; Hermele, Michael; Kimchi, Itamar; Cao, Gang | We present the experimental observation of a new kind of frustrated quantum liquid arising in an unlikely place: the magnetic insulator Ba 4Ir 3O 10 where Ir 3O 12 trimers form an unfrustrated square lattice. | Session 5: 5d/4d Transition Metal Systems |

63 | New experimental approaches for exploring condensed matter physics | Yacoby, Amir | In this talk, I will review some of our recent work that uses NV center magnetometry to image skyrmions in thin magnetic films, measure the spin chemical potential in magnetic insulators, and image hydrodynamic electron flow in graphene. | Session 6: Advances in Quantum Sensing |

64 | Hybrid sensing approaches for quantum spin sensors | Flatté, Michael | Here I will describe two recent proposals for hybrid sensing modalities. | Session 6: Advances in Quantum Sensing |

65 | Defect spins in two-dimensional materials for quantum sensing and nanophotonics | Bassett, Lee | This talk will introduce the properties of optically active defects in hBN, focusing in particular on their room-temperature optical and spin properties [1,2]. | Session 6: Advances in Quantum Sensing |

66 | What would you do with a quantum-limited torque magnetometer? | Davis, John | At the University of Alberta, we have focused on harnessing cavity optomechanical detection to measure ever smaller moment of inertia resonators, thereby improving torque sensing. | Session 6: Advances in Quantum Sensing |

67 | Chalker-Coddington network model as a Floquet topological insulator | Gurarie, Victor; Potter, Andrew | Instead, the topological phase of the network model arises from a non-trivial dynamical Floquet invariant, i.e. the network model describes transitions between trivial and chiral Floquet phases of a distinct topological class from the integer quantum Hall effect. | Session 7: Advances in the Integer Quantum Hall Effect |

68 | Quantum Hall Effect in Quasi-One-Dimensional Weak Topological Insulator | Xu, Tianyi; Cheung, Patrick; Wu, Fengcheng; Zhang, Fan | We study theoretically the integer quantum Hall effect of such WTI surface states and show the important roles played by the special geometry, symmetry, topology, and their interplay in Bi 4X 4. | Session 7: Advances in the Integer Quantum Hall Effect |

69 | Non-interacting and interacting Graphene in a strong uniform magnetic field | Das, Ankur; Kaul, Ribhu; Murthy, Ganpathy | We study monolayer graphene in a uniform magnetic field in the absence and presence of interactions. | Session 7: Advances in the Integer Quantum Hall Effect |

70 | Quantum Hall Effect in Chirality-induced Weyl Semiconductor n-type Tellurene | Qiu, Gang; Niu, Chang; Wang, Yixiu; Si, Mengwei; Wu, Wenzhuo; Ye, Peide (Peter) | In this work we report the first quantum Hall experiment in ALD doped n-type 2D tellurium (dubbed as tellurene) samples with mobility 6,000 cm 2/Vs. | Session 7: Advances in the Integer Quantum Hall Effect |

71 | Chiral quasiparticle tunneling between quantum Hall edges in proximity with a superconductor | Borzenets, Ivan; Wei, Ming-Tso; Draelos, Anne; Seredinski, Andrew; Ke, Chung-Ting; Watanabe, Kenji; Taniguchi, Takashi; Yamamoto, Michihisa; Tarucha, Seigo; Amet, Francois; Finkelstein, Gleb | We study a two-terminal graphene Josephson junction with contacts shaped to form a narrow constriction, less than 100 nm in length. | Session 7: Advances in the Integer Quantum Hall Effect |

72 | Hall and dissipative viscosity and conductivity in a disordered 2D electron gas | Burmistrov, Igor; Goldstein, Moshe; Kot, Mordecai; Kurilovich, Vladislav; Kurilovich, Pavel | In the regime of weak magnetic field we describe the quantum (Shubnikov-de Haas type) oscillations of the viscosity, nonlocal conductivity, and Wen-Zee response. | Session 7: Advances in the Integer Quantum Hall Effect |

73 | Geometric entanglement in integer quantum Hall states | Fournier, Lucie; Witczak-Krempa, William | We study the structure of entanglement in integer quantum Hall states using the entanglement entropy (EE) as well as the reduced density matrix, through its spectrum and eigenstates. | Session 7: Advances in the Integer Quantum Hall Effect |

74 | Strong-disorder renormalization group approach to the integer quantum Hall effect | Getelina, João; Puschmann, Martin; Hoyos, Jose; Vojta, Thomas | We propose an alternative numerical approach, namely a modified strong-disorder renormalization group (SDRG) method, in order to investigate this transition. | Session 7: Advances in the Integer Quantum Hall Effect |

75 | Non-local induced pairing in chiral edge states | Michelsen, Andreas; Recher, Patrik; Braunecker, Bernd; Schmidt, Thomas | Such correlations are often put into models by hand in local approximations, but by building a model without assumed locality we are able predict the strength and non-local spatio-temporal behaviour of the correlation. | Session 7: Advances in the Integer Quantum Hall Effect |

76 | Reconstruction near the interface of a ν=4 and ν=3 QH systems | Saha, Amartya; De, Suman; Murthy, Ganpathy; Rao, Sumathi; Gefen, Yuval | We study the Hartree-Fock ground state near the interface between the ν=4 and ν=3 quantum Hall systems. | Session 7: Advances in the Integer Quantum Hall Effect |

77 | Spin-1 Photonic Skyrmion in Viscous Quantum Hall Fluids | Van Mechelen, Todd; Jacob, Zubin | We present the fundamental model of a topological electromagnetic phase of matter: viscous Maxwell-Chern-Simons theory. | Session 7: Advances in the Integer Quantum Hall Effect |

78 | Excited quantum Hall effect: enantiomorphic flat bands in a Yin-Yang Kagome lattice | Zhou, Yinong; Sethi, Gurjyot; Liu, Hang; Wang, Zhengfei; Liu, Feng | We propose a theoretical concept and model of non-equilibrium excited-state QHE (EQHE) without intrinsic magnetization. | Session 7: Advances in the Integer Quantum Hall Effect |

79 | ferromagnetic transition in chiral metal | Liu, Tongtong; Bi, Zhen; Hong, Sungjoon; Fu, Liang | This letter studies a spinful 1D chiral electron model with contact interaction and nonlinear dispersion, where an itinerant ferromagnetic phase transition happens at repulsive interaction and an Amperean pairing at attractive interaction, the two phases are symmetrical and connected by a particle-hole transformation. | Session 7: Advances in the Integer Quantum Hall Effect |

80 | van der Waals Heterostructures of 3D Topological Insulators and 2D Magnetic Materials | Liu, Shuwan; Chong, Su Kong; Sparks, Taylor D.; Deshpande, Vikram | Previously we have observed both massless relativistic Dirac fermions and massive (gapped) Dirac fermions in this way for the topological surface state of BiSbTeSe 2 1 and have reported quantum Hall data for these surfaces. | Session 7: Advances in the Integer Quantum Hall Effect |

81 | Phase transition and anomalous scaling in the quantum Hall transport of topological-insulator Sn-Bi1.1Sb0.9Te2S devices | Xie, Faji; Zhang, Shuai; Song, Fengqi | Phase transition and anomalous scaling in the quantum Hall transport of topological-insulator Sn-Bi1.1Sb0.9Te2S devices | Session 7: Advances in the Integer Quantum Hall Effect |

82 | Electronic nematic softening in cuprate superconductors probed by resonant ultrasound spectroscopy | Giraldo-Gallo, Paula | In this talk I will present Resonant Ultrasound Spectroscopy (RUS) measurements in single crystals of La2-xSrxCuO4 of different Sr compositions, through which we have determined the temperature dependence of all elastic moduli in the tetragonal phase of this compound. | Session 8: Anomalous Transport in Strange Metals |

83 | Strange Metal Transport in Electron-doped La2-xCexCuO4 | Greene, Richard | I present new measurements of resistivity, Hall Effect, magnetoresistance (MR) and thermopower in the electron-doped cuprate La 2-xCe xCuO 4 for 0.19≥ x ≥0.08 as a function of temperature and magnetic field. | Session 8: Anomalous Transport in Strange Metals |

84 | What determines the Hall and Thermal Hall coefficients of metals, magnets and superconductors? | Auerbach, Assa | We show that Hall sign reversal is a consequence of proximity to a Mott insulator, and that a negative thermal Hall coefficient is produced in the square lattice antiferromagnet with three-spin exchanges. | Session 8: Anomalous Transport in Strange Metals |

85 | Sign reversal of the flux flow Hall effect | Vinokour, Valerii | We present a phenomenological theory of the Hall effect sign reversal in type II superconductors taking into account the normal carriers scattering and the topological contribution to Hall conductivity and show that the latter contribution leads to a double sign change of the Hall conductivity. | Session 8: Anomalous Transport in Strange Metals |

86 | Scale-invariant magnetoresistance in a cuprate superconductor | Giraldo-Gallo, Paula; Galvis, Jose; Stegen, Zachary; Modic, Kimberly; Balakirev, Fedor; Betts, Jonathan; Lian, Xiujun; Moir, Camilla; Wu, Jie; Bollinger, Anthony; He, Xi; Bozovic, Ivan; Ramshaw, Brad; McDonald, Ross; Boebinger, Gregory; Shekhter, Arkady | In this talk, we report the high-field magnetoresistance of thin-film La 2–xSr xCuO 4 cuprate in the vicinity of the critical doping, 0.161 ≤ p ≤ 0.190. | Session 8: Anomalous Transport in Strange Metals |

87 | First single crystals of a new itinerant antiferromagnet without magnetic elements | Moya, Jaime; Hallas, Alannah; Morosan, Emilia; Loganathan, Vaideesh; Nevidomskyy, Andriy; Weickert, Franziska; Beare, James; Cai, Yipeng; Luke, Graeme; Huang, Chien-Lung | We present the results on single crystals of a new itinerant AFM with no magnetic constituent elements which orders at T N= 11 K. | Session 9: Antiferromagnetic Order and Instabilities |

88 | Magnetochiral dichroism in a collinear antiferromagnet MnTiO3 with zero magnetization | Sato, Tatsuki; Abe, Nobuyuki; Kimura, Shojiro; Tokunaga, Yusuke; Arima, Taka-hisa | In our presentation, we will propose the microscopic description of the origin of the MChD in MnTiO 3 from the viewpoint of local symmetry on each Mn site. | Session 9: Antiferromagnetic Order and Instabilities |

89 | Highly nonlinear magnetoelectric effect in antiferromagnetic Co4Ta2O9 single crystals | Oh, Donggun; Lee, Nara; Choi, Sungkyun; Moon, Jae Young; Kim, Jong Hyuk; Shin, Hyun Jun; Choi, Hwan Young; Kwanghyo, Son; Gutmann, Matthias; Kim, Gideok; Kiryukhin, Valery; Nuss, Jurgen; Choi, Young Jai | We observe a highly nonlinear magnetoelectric effect on single crystals of Co 4Ta 2O 9 (CTO), distinctive from the linear behavior in the isostructural Co 4Nb 2O 9. | Session 9: Antiferromagnetic Order and Instabilities |

90 | Gapless antiferromagnetic behavior in newly synthesized marcasite-phase CoAsSe | Chen, Yiyao; Yumnam, George; Dahal, Ashutosh; Rodriguez-Rivera, Jose; Xu, Guangyong; Heitmann, Thomas; Singh, Deepak | We will present the magnetic structures of the newly synthesized marcasite phase CoAsSe and discuss its relationship to electrical measurement results. | Session 9: Antiferromagnetic Order and Instabilities |

91 | Microscopic insights to ARPES spectra of doped quantum anti-ferromagnets | Grusdt, Fabian; Bohrdt, Annabelle; Pollmann, Frank; Knap, Michael | Here we present new theoretical insights to the ARPES spectrum of quantum anti-ferromagnets at low doping: We argue that, at strong coupling $t \gg J$, the spectrum directly reflects the spectral function of a spinon which forms a universal bound state with the chargon created in the measurement. | Session 9: Antiferromagnetic Order and Instabilities |

92 | Optical conductivity of CrAs across the paramagnetic to antiferromagnetic transition | Zimmers, Alexandre; Lobo, Ricardo; Haghighirad, Amir-Abbas; Le Tacon, Matthieu | We report the optical spectroscopy of monopnictide crystal CrAs. | Session 9: Antiferromagnetic Order and Instabilities |

93 | Gapless spin liquid state of the spin-1/2 honeycomb antiferromagnetic Gamma model | Wang, Xiaoqun; Luo, Qiang; Zhao, Jize | We propose a choreographed model by introducing a bond-modulated Heisenberg interaction J in addition to the Gamma term. | Session 9: Antiferromagnetic Order and Instabilities |

94 | Evidence for a Field-Induced Quantum Phase Transition in Ising-like D-Er2Si2O7 | Hester, Gavin; DeLazzer, Tim; Yahne, Danielle; Sarkis, Colin; Ross, Kate | In this work we have performed specific heat, magnetometry, and inelastic neutron scattering (INS) on a polycrystalline sample to further characterize the magnetism of D-Er 2Si 2O 7. | Session 9: Antiferromagnetic Order and Instabilities |

95 | Nonthermal interacting-magnon dynamics in an optically driven 2D Heisenberg antiferromagnet | Kalthoff, Mona; Kennes, Dante; Millis, Andrew; Sentef, Michael | Here we present first steps towards a full interacting theory of this dynamical phase transition using a Dyson Maleev large Spin expansion and a Boltzmann formalism to investigate the effects of magnon-magnon interactions on the dynamical phase transition. | Session 9: Antiferromagnetic Order and Instabilities |

96 | Coherently driven phonons coupled to antiferromagnetic order | Kasper, Valentin; Julia, Sergi; Chhajlany, Ravindra; Lewenstein, Maciej | In this work we study the effect of a single coherent phonon mode coupled to antiferromagnetic order. | Session 9: Antiferromagnetic Order and Instabilities |

97 | Refinement of exchange parameters and magnetic form factor of Mn3Ir from neutron spectroscopy measurements. | LeBlanc, Martin; Aczel, Adam; Granroth, Garrett; Southern, Byron; Nagler, Stephen; Yan, Jiaqiang; Whitehead, John; Plumer, Martin | Refinement of exchange parameters and magnetic form factor of Mn3Ir from neutron spectroscopy measurements. | Session 9: Antiferromagnetic Order and Instabilities |

98 | Orbital magnetization in magnetic neutron scattering | Chen, Hua | We show that magnetic neutron scattering in general maps out the equilibrium electric current distribution inside the material but leaves the magnetization density unfixed because of a gauge freedom. | Session 9: Antiferromagnetic Order and Instabilities |

99 | Numerical evidence for a continuous phase transition between Neel and valence bond solid phases on a spin-ladder system | Ogino, Takuhiro; Kaneko, Ryui; Morita, Satoshi; Kawashima, Naoki | We investigate the possibility of deconfined quantum criticality in the J-Q-like model in one spatial dimension. | Session 9: Antiferromagnetic Order and Instabilities |

100 | Monte Carlo study of microscopic models for Néel-to-plaquette VBS transition on 2D square lattice | Takahashi, Jun; Sandvik, Anders | Here, we construct such a model, and probe the nature of the transition with quantum Monte Carlo simulations. | Session 9: Antiferromagnetic Order and Instabilities |

101 | Terahertz 2D coherent spectroscopy of transverse field quantum Ising model with further neighbor interactions | Qiang, Yihua; Sizyuk, Yuriy; Victa Trevisan, Thais; Orth, Peter | Using a Jordan-Wigner transformation the model can be mapped to interacting fermions, for which we compute the 2DCS spectrum in a field-theoretical Keldysh approach. | Session 9: Antiferromagnetic Order and Instabilities |

102 | Superconductors, Orbital Magnets, and Correlated States in Magic Angle Bilayer Graphene | Efetov, Dmitri | Here we report on the fabrication of bilayer graphene devices with exceptionally uniform twist angles. | Session 10: Broken Symmetries and Electron Pairing in Magic-Angle Flat Bands |

103 | Competing Orders, Nematicity and Novel Josephson Effects in Magic-Angle Graphene Superlattices | Cao, Yuan | In this talk I will present that demonstrate some peculiar aspects of magic-angle twisted bilayer graphene (MATBG) which has recently been discovered to exhibit correlated insulating phase and unconventional superconductivity. | Session 10: Broken Symmetries and Electron Pairing in Magic-Angle Flat Bands |

104 | Engineering Correlation and Topology in Two-Dimensional Moire Superlattices | Wang, Feng | In this talk, I will describe how to engineer correlated and topological physics using moire superlattice in two dimensional heterostructures. | Session 10: Broken Symmetries and Electron Pairing in Magic-Angle Flat Bands |

105 | Strong coupling phases of partially filled twisted bilayer graphene narrow bands. | Vafek, Oskar; Kang, Jian | Strong coupling phases of partially filled twisted bilayer graphene narrow bands. | Session 10: Broken Symmetries and Electron Pairing in Magic-Angle Flat Bands |

106 | Correlated insulating states and broken symmetries in magic angle twisted bilayer graphene | Xie, Ming; Potasz, Pawel; Macdonald, Allan | I will argue on the basis of recent experiments that spin/valley flavor symmetries are often broken even in metallic and superconducting states and extend our SCHF calculations to metallic cases in an effort to shed light on electronic properties in the metallic regime. | Session 10: Broken Symmetries and Electron Pairing in Magic-Angle Flat Bands |

107 | A Path to the Exascale for Atomistic Simulations with Improved Accuracy, Length and Time Scales | Wood, Mitchell; Thompson, Aidan; Plimpton, Steven; Niklasson, Anders; Perez, Danny | This talk will overview the U.S. Department of Energy* EXAALT (EXascale Atomistics for Accuracy, Length and Time) project and our efforts to provide software tools for MD that not only scale efficiently to huge atom counts, but also enable efficient MD simulations for smaller systems too. | Session 11: Building the Bridge to Exascale: Applications and Opportunities for Materials, Chemistry, and Biology |

108 | Accelerating Quantum Molecular Dynamics simulations: Can GPUs really help? | Fattebert, Jean-Luc; Negre, Christian; Mohd-Yusof, Jamal; Adedoyin, Toks; Osei-Kuffuor, Daniel; Mniszewski, Susan | In this talk we will present some software library solutions in development to facilitate porting electronic structure codes to new architectures, as well as parallel strategies and algorithms that can help speed up time-to-solution in real applications. | Session 11: Building the Bridge to Exascale: Applications and Opportunities for Materials, Chemistry, and Biology |

109 | Multibillion Atom Molecular Dynamics Simulations of Cellular Membranes | Trebesch, Noah; Tajkhorshid, Emad | To take advantage of this opportunity, we have developed xMAS (E xperimentally-Derived Membranes of Arbitrary Shape) Builder, software designed to turn low resolution EM-based structures of cellular membranes into atomistic models that are suitable for MD. | Session 11: Building the Bridge to Exascale: Applications and Opportunities for Materials, Chemistry, and Biology |

110 | Unveiling the structural properties of HIV-1 vesicle from atomistic molecular dynamics simulations | Gonzalez, Fabio; Reddy, Tyler; Perilla, Juan | Here, exploiting the advances of molecular modeling, we present the first insights towards the construction of an all-atomistic model of the HIV-1 mature and immature virion. | |

111 | Molecular Understanding of Membranes for the Water-Energy Nexus in the Exascale Realm | Perahia, Dvora; Grest, Gary | Here we will present molecular dynamics simulation results that depict the structured motion and transport in polymeric membranes that consists of units, or blocks, with different chemical structures, tailored into a macromolecule with targeted roles. | |

112 | Multi-GPU parallelization of Deep Potential Molecular Dynamics for high-performance computing | Lu, Denghui; Jia, Weile; Chen, Mohan; Wang, Han; Zhang, Linfeng | In this work, we develop the multi-GPU parallelization for DeePMD-kit [3], an implementation of DPMD, and optimize the workflows when the package interfaces with LAMMPS and TensorFlow. | |

113 | Scalable Frameworks for Reinforcement Learning for Control of Self-Assembling Materials and for Chemistry Design | Welch, Paul; Sweeney, Christine; 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. | |

114 | Exascale-ready neural network interatomic potentials with CabanaMD | Reeve, Sam; Desai, Saaketh; Belak, James | In the drive towards exascale computing, new hardware and software technologies are enabling more complex, accurate, and expensive models, but only with rethinking of algorithms, communication patterns, and data layouts. | |

115 | DOE Software Center for Non-perturbative Studies of Functional Materials Under Non-equilibrium Conditions (NPNEQ) | Ogitsu, Tadashi; Andrade, Xavier; Correa, Alfredo; Tan, Liang; Prendergast, David; Pemmaraju, Sri Chaitanya Das; Lindenberg, Aaron | In this presentation, we will introduce the software center, NPNEQ, where the open-source real-time time-dependent density-functional-theory (RT-TDDFT) code is being developed. | |

116 | Towards fast and accurate exascale density functional theory calculations using DFT-FE — a massively parallel real-space code using adaptive finite-element discretization | Das, Sambit; Motamarri, Phani; Gavini, Vikram | In this talk, we present a significant advance in the state-of-the-art for accurate DFT calculations -via- the development of DFT-FE, that has enabled fast, scalable and accurate large-scale DFT calculations on material systems with tens of thousands of electrons. | |

117 | Massively-Parallel Real-Time TDDFT Simulations of Electronic Stopping in Solvated DNA under Proton Irradiation | Yost, Dillon; Yao, Yi; Shepard, Chris; Kanai, Yosuke | We discuss massively-parallel real-time, time-dependent density functional theory (RT-TDDFT) simulations for investigating electronic stopping in DNA solvated in water. | |

118 | Spatiotemporal Mapping of Polymer Dynamics | Ma, Jihong; Carrillo, Jan-Michael; Sumpter, Bobby; Wang, Yangyang | In this talk, we demonstrate a novel approach to resolve the fine spatiotemporal features of entangled polymer dynamics, by leveraging the computational resources at the Oak Ridge Leadership Computing Facility. | |

119 | Towards adaptive exascale workflows for simulating long timescales | Ossyra, John; Sedova, Ada; Smith, Jeremy | We present a highly scalable workflow software, AdaptiveMD, that implements a massively parallel adaptive-sampling algorithm to build a Markov-state model of long-timescale biomolecular kinetics. | |

120 | Accelerating Large-Scale GW Calculations on Hybrid GPU-CPU Systems | Del Ben, Mauro; Yang, Charlene; Louie, Steven; Deslippe, Jack | This talk showcases the various techniques used to accelerate the Material Science code BerkeleyGW on hybrid architectures targeting to accelerate large scale simulations with thousands of atoms. | Session 12: Building the bridge to exascale: applications and opportunities for materials, chemistry, and biology |

121 | Accuracy limits of quantum Monte Carlo in the weak-interaction limit | Fanta, Roman; Dubecky, Matus | Accuracy limits of quantum Monte Carlo in the weak-interaction limit | Session 12: Building the bridge to exascale: applications and opportunities for materials, chemistry, and biology |

122 | Simulating realistic features of chemical and materials systems with massively parallel many-body perturbation theory calculations | Vigil-Fowler, Derek; Clary, Jacob; Musgrave, Charles; Holder, Aaron | In this talk we will discuss our work on simulating the electrochemical oxygen reduction reaction (ORR) on a system of FeN 4clusters in graphene using the many-body random phase approximation (RPA) and including the effects of zero-point energy, vibrational entropy, solvation, and applied bias. | Session 12: Building the bridge to exascale: applications and opportunities for materials, chemistry, and biology |

123 | Large temperature sensitivity of optical emission via synergy of Raman and photoluminescence effects in BaTiO3-based phosphor | DE, ARNAB; Ranjan, Rajeev | Here we propose a new strategy for achieving high temperature sensitivity by considering a twin combination of Raman and PL spectrum of the phosphor material, and by introducing Raman-PL-intensity ratio ( RPIR) as a parameter for measuring relative temperature sensitivity( Sr). | |

124 | NWChemEx – Computational Chemistry for the Exascale Era | van Dam, Hubertus; Apra, Edoardo; Bair, Raymond; Boschen, Jeffery; Bylaska, Eric; De Jong, Wibe; Dunning, Thomas; Govind, Niranjan; Harrison, Robert; Keipert, Kristopher; Kowalski, Karol; Krishnamoorthy, Sriram; Kumar, Suraj; Mutlu, Erdal; Palmer, Bruce; Panyala, Ajay; Peng, Bo; Richard, Ryan; Straatsma, T; Valeev, Edward; Valiev, Marat; Williams-Young, David; Yang, Chao; Windus, Theresa | We focus on overcoming the limitations of NWChem’s design. | |

125 | Accessible and collaborative web interface for HPC materials simulations | Bazhirov, Timur | We outline the concept for the creation of a web-enabled infrastructure for predictive theory and modeling [2] able to facilitate access to, coordination and sharing of information and data produced by scalable codes adapted for exascale computing. | |

126 | Large-scale many-body perturbation theory calculations on leadership class facilities | Govoni, Marco; Ma, He; Gygi, Francois; Galli, Giulia | We will present new functionalities enabled by the concurrent use of WEST and the Qbox code [http://qboxcode.org], with focus on interoperability paradigms. | |

127 | Electronic density and atomic forces in solids by plane-wave auxiliary-field quantum Monte Carlo | Chen, Siyuan; Motta, Mario; Ma, Fengjie; Zhang, Shiwei | We present accurate electronic densities for several prototypical solids, including the ionic crystal NaCl, covalent-bond semiconductor Si, and metalic Cu. | |

128 | A pseudo-BCS wavefunction from density matrix decomposition – application in auxilary-field quantum Monte Carlo | Xiao, Zhi-Yu; Shi, Hao; Zhang, Shiwei | We present a method to construct BCS-like (pseudo-BCS) wave functions from the one-body density matrix. | |

129 | Electronic band gaps from Quantum Monte Carlo methods | Yang, Yubo; Gorelov, Vitaly; PIERLEONI, CARLO; Ceperley, David; Holzmann, Markus | We develop a method for calculating the fundamental electronic gap of semiconductors and insulators using grand canonical Quantum Monte Carlo simulations. | |

130 | RuCl3 electronic structure by quantum Monte Carlo | Annaberdiyev, Abdulgani; Melton, Cody; Clay, Raymond; Shulenburger, Luke; Wang, Guangming; Mitas, Lubos | In particular, we attempt to understand the role of electron correlations as they affect the ground and excited states. | |

131 | Heavy-atom systems in quantum Monte Carlo: pseudopotentials and beyond | Wang, Guangming; Annaberdiyev, Abdulgani; Melton, Cody; Bennett, Michael; Shulenburger, Luke; Mitas, Lubos | We study the electronic structure of selected systems with heavy atoms such as Ru, Ir, Pb, Bi and I, using quantum Monte Carlo (QMC). | |

132 | Mitigating the Sign Problem Through Basis Rotations | Levy, Ryan; Clark, Bryan | In this talk, we show how to use sign-free quantum Monte Carlo simulations to minimize the effect of the sign problem by optimizing over the choice of basis on large two-dimensional systems. | |

133 | Towards Exascale Electronic Structure and Quantum Transport Calculations | Bernholc, Jerry | We have developed an open-source code that discretizes the DFT equations on real-space grids that are distributed over the nodes of a massively parallel system via domain decomposition. | |

134 | Towards first-principles design of quantum devices | Jakowski, Jacek; Bernholc, Jerry; Yoon, Mina; Lingerfelt, David; Lu, Wenchang; Briggs, Emil | We discuss the implementation of time-dependent electron dynamics in the real-space multigrid (RMG) density functional theory software package. | |

135 | GPU-Acceleration of the ELPA2 Distributed Eigensolver for Applications in Electronic Structure Theory | Yu, Victor; Moussa, Jonathan; Blum, Volker | We here present GPU-oriented optimizations of the ELPA two-stage tridiagonalization eigensolver (ELPA2). | |

136 | Driving exascale computational science with AiiDA | Huber, Sebastiaan; Pizzi, Giovanni; Marzari, Nicola | Therefore, we have developed a comprehensive, robust, open source, high-throughput infrastructure AiiDA (http://aiida.net) dedicated to address the challenges in automated workflow management and data provenance storage. | |

137 | DMFTwDFT: A free-license DMFT package interfaced with various DFT implementations | Park, Hyowon; Singh, Vijay; Herath, Uthpala; Wah, Benny; Liao, Xingyu; Romero, Aldo | In this talk, we present an open-source computational package (DMFTwDFT) combining DMFT with various DFT codes interfaced to a Wannier90 package for adopting maximally localized Wannier functions as local orbitals to describe a correlated subspace. | |

138 | Scaling and Performance of Real-Space Electronic Structure Calculations on Exascale Architectures | Briggs, Emil; Lu, Wenchang; Bernholc, Jerry | We will discuss efficient and scalable implementation of distributed data flow and key electronic structure algorithms on exascale class machines in RMG, as well as methods for addressing MPI scalability constraints and data bottlenecks. | |

139 | From LSMS to MuST: Large scale first principles materials calculations at the exascale | Eisenbach, Markus; Liu, Xianglin; Odbadrakh, Khorgolkhuu; Wang, Yang | We present recent advances in our Locally-selfconsistent Multiple Scattering (LSMS) code for scalable first principles density functional calculations of materials. | |

140 | Mixed precision sampling of quantum states of matter | Maier, Thomas; Balduzzi, Giovanni; Haehner, Urs; Li, Ying Wai; Chatterjee, Arghya; D’Azevedo, Ed | In materials science, they provide an important framework to unravel the mechanisms that give rise to complex behavior and different quantum states of matter. | |

141 | Towards finite-temperature tensor network simulations of the two-dimensional Hubbard model | Wietek, Alexander; Stoudenmire, Miles | We demonstrate how the METTS algorithm in combination with modern time-evolution algorithms for matrix-product states, like the time-dependent variational principle (TDVP) method, allows simulating the Hubbard model at finite temperature for cylinder geometries approaching the two-dimensional limit. | |

142 | Comparison of systematically improvable DMC and AFQMC for condensed matter | Benali, Anouar; Malone, Fionn; Morales, Miguel; Shulenburger, Luke | In this work we assess the cost and feasibility of determining exact total energies for solid state Hamiltonians by studying primitive cells of four representative materials, Al, LiF, C and TiO2. | |

143 | Quantum Monte Carlo with orbital optimization applied on solids | Luo, Ye | Thus, we enable orbital optimization schemes like mixing occupied and unoccupied orbitals or directly optimizing orbital shapes and study their strength and weakness on solid state systems. | |

144 | Auxiliary-Field Quantum Monte Carlo Applied to Correlated Materials | Malone, Fionn; Lee, Joonho; Zhang, Shuai; Morales, Miguel | In this talk we investigate the application of auxiliary-field quantum Monte Carlo (AFQMC) to correlated materials. | |

145 | Magnetic and charge orders in the ground state of the 2D repulsive Hubbard model | Xu, Hao; Qin, Mingpu; Shi, Hao; He, Yuan-Yao; Zhang, Shiwei | Using the auxiliary field quantum Monte-Carlo (AFQMC) method combined with a self-consistent constraint [1], we systematically study the ground state of the two-dimensional repulsive Hubbard model as a function of doping and interaction strengths. | |

146 | Realizing the bulk-boundary correspondence for anomalous symmetry-enriched topological phases | Bulmash, Daniel; Barkeshli, Maissam | We construct models of anomalous 2+1D symmetry-enriched topological phases (SETs) on the surfaces of 3+1D symmetry-protected topological phases, providing an explicit realization of the bulk-boundary correspondence for SETs. | Session 13: Bulk-Boundary Correspondence and Classification of Topological Phases |

147 | Bulk-boundary correspondence for (2+1)D symmetry protected topological phases | Kawagoe, Kyle; Levin, Michael | In this talk, we present a general method for solving this problem in the case of (2+1)D interacting bosonic systems with internal (non-spatial) symmetries. | Session 13: Bulk-Boundary Correspondence and Classification of Topological Phases |

148 | Correlated bulk-boundary correspondence of the higher-order topological insulator | Kudo, Koji; Yoshida, Tsuneya; Hatsugai, Yasuhiro | In this talk, we propose a novel topological state which we call “higher-order topological Mott insulator” (HOTMI) [1]. | Session 13: Bulk-Boundary Correspondence and Classification of Topological Phases |

149 | Anomaly and symmetry fractionalization of mirror-symmetric fermionic topological orders | Mao, Binbin; Wang, Chenjie | We study symmetry fractionalization and quantum anomaly in general 2D fermionic topological orders with the mirror reflection symmetry. | Session 13: Bulk-Boundary Correspondence and Classification of Topological Phases |

150 | Computing the Classification of Fermionic Symmetry-Protected Topological States | Ouyang, Yunqing; Wang, Qing-Rui; Gu, Zhengcheng; Qi, Yang | Computing the Classification of Fermionic Symmetry-Protected Topological States | Session 13: Bulk-Boundary Correspondence and Classification of Topological Phases |

151 | Non-Abelian reciprocal braiding of Weyl nodes and fragile topology | Bouhon, Adrien; Wu, QuanSheng; Slager, Robert-Jan; Bzdusek, Tomas | Non-Abelian reciprocal braiding of Weyl nodes and fragile topology | Session 13: Bulk-Boundary Correspondence and Classification of Topological Phases |

152 | Topology of SO(5) monopoles and three dimensional Dirac semimetals | Goswami, Pallab; Tyner, Alexander; Sur, Shouvik | We will show how the implementation of global rotational symmetry causes an U(1) x U(1) abelian gauge fixing of SO(5) vector potential, allowing us to define monopole invariants and quantized “spin Chern" numbers respectively for the Dirac points and the two dimensional planes perpendicular to the direction of nodal separation. | Session 13: Bulk-Boundary Correspondence and Classification of Topological Phases |

153 | Duality between supercohomology fermionic SPT (symmetry-protected-topological) phases and higher-group bosonic SPT phases | Chen, Yu-An; Ellison, Tyler; Tantivasadakarn, Nathanan | Particularly in (3+1)D, we will show a unitary quantum circuit for any supercohomology fermionic SPT state with gapped boundary construction. | Session 13: Bulk-Boundary Correspondence and Classification of Topological Phases |

154 | Non-Abelian anomalies in multi-Weyl semimetals | Dantas, Renato M. A.; Pena-Benitez, Francisco; Roy, Bitan; Surowka, Piotr | We construct the effective field theory for time-reversal symmetry breaking multi-Weyl semimetals (mWSMs), composed of a single pair of Weyl nodes of (anti-)monopole charge $n$, with $n=1,2,3$ in crystalline environment. | Session 13: Bulk-Boundary Correspondence and Classification of Topological Phases |

155 | Entanglement Entropy of Generalized Moore-Read Fractional Quantum Hall State Interfaces | Sohal, Ramanjit; Han, Bo; Santos, Luiz; Teo, Chi Yan Jeffrey | We consider interfaces between different MR states and write down explicit tunneling terms, which we motivate using an anyon condensation picture. | Session 13: Bulk-Boundary Correspondence and Classification of Topological Phases |

156 | Majorana zero modes in the presence of many-body interactions | Maska, Maciej; Wieckowski, Andrzej; Mierzejewski, Marcin | We show that one of these approaches can be utilized for constructing local, conserved, Majorana fermions in systems with an arbitrary many-body interaction [2]. | Session 13: Bulk-Boundary Correspondence and Classification of Topological Phases |

157 | The Nieh-Yan Anomaly: Torsional Landau Levels, Central Charge and Anomalous Thermal Hall Effect | Huang, Ze-Min; Han, Bo; Stone, Michael | We study this anomaly from the point of view of torsional Landau levels. | Session 13: Bulk-Boundary Correspondence and Classification of Topological Phases |

158 | Bulk-edge and bulk-hinge correspondence in inversion-symmetric insulators | Takahashi, Ryo; Tanaka, Yutaro; Murakami, Shuichi | We show that a slab of a three-dimensional inversion-symmetric higher-order topological insulator (HOTI) in class A is a 2D Chern insulator, and that in class AII is a 2D Z 2 topological insulator. | Session 13: Bulk-Boundary Correspondence and Classification of Topological Phases |

159 | Surface Topological Order for Higher-Order Topological Phases of Matter | Tiwari, Apoorv; Li, Minghao; Bernevig, Andrei; Neupert, Titus; parameswaran, Siddharth | We show that the chiral Dirac and Majorana hinge modes in three-dimensional higher-order topological insulators (HOTIs) and superconductors (HOTSCs) can be gapped while preserving the protecting C_{2n}T symmetry upon the introduction of non-Abelian surface topological order. | Session 13: Bulk-Boundary Correspondence and Classification of Topological Phases |

160 | 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 Yb-compounds. | Session 14: Cerium-Based Heavy Fermion Metals |

161 | Crystal-field excitations and magnetic fluctuations of heavy-fermion metal CeB6 | Ye, Mai; Kung, Hsiang-Hsi; Rosa, Priscila; Bauer, Eric; Fisk, Zachary; Blumberg, Girsh | We study the crystal-field (CF) excitations and magnetic fluctuations at Ce 3+ sites by Raman scattering [Phys. | Session 14: Cerium-Based Heavy Fermion Metals |

162 | Large Fermi surface expansion through anisotropic mixing of conduction and f electrons in the semimetallic Kondo lattice CeBi | Li, Peng; Wu, Zhongzheng; Wu, Fan; Guo, Chunyu; Liu, Yi; Liu, Haijiang; Sun, Zhe; Shi, Ming; Rodolakis, Fanny; McChesney, Jessica; Cao, Chao; Yuan, Huiqiu; Steglich, Frank; Liu, Yang | Using angle-resolved photoemission spectroscopy (ARPES) and resonant ARPES, we report evidence of strong anisotropic conduction- f electron mixing ( c- f mixing) in CeBi by observing a largely expanded Ce-5 d pocket at low temperature, with no change in the Bi-6 p bands. | Session 14: Cerium-Based Heavy Fermion Metals |

163 | Vanishing Hall number at a quantum critical point | Maksimovic, Nikola; Cookmeyer, Taylor; Hayes, Ian; Altman, Ehud; Analytis, James | We study the effect of particle-hole dilution in the unconventional superconductor CeCoIn 5, and discover an unusual critical point that connects two distinct Fermi liquids with different Fermi surface volumes without any apparent symmetry breaking. | Session 14: Cerium-Based Heavy Fermion Metals |

164 | Quantum Critical Strange Metal and Fermi Surface Reconstruction in a large-N Kondo Lattice Model | Patel, Aavishkar; Cookmeyer, Taylor; Aldape, Erik; Altman, Ehud | We present a modified large- N Kondo lattice model, which also describes a transition from a small Fermi surface to a heavy Fermi liquid with a large Fermi surface, but gives rise to T-linear resistivity at the critical point. | Session 14: Cerium-Based Heavy Fermion Metals |

165 | Spectroscopic evidence for pre-formed heavy electron pairs and novel pairing mechanism in CeCoIn5 (Part 1/2) | Shrestha, Keshav; Zhang, Shengzhi; Greene, Laura; Thompson, Joe; Lai, You; Baumbach, Ryan; Sasmal, Kalyan; Maple, M Brian; Park, Wan Kyu | Here, we present results from planar tunneling spectroscopy measurements on CeCoIn 5 along [001], [100], and [110] directions. | Session 14: Cerium-Based Heavy Fermion Metals |

166 | Spectroscopic evidence for pre-formed heavy electron pairs and novel pairing mechanism in CeCoIn5 (Part 2/2) | Shrestha, Keshav; Zhang, Shengzhi; Greene, Laura; Thompson, Joe; Lai, You; Baumbach, Ryan; Sasmal, Kalyan; Maple, M Brian; Park, Wan Kyu | Here, we present results from planar tunneling spectroscopy on CeCoIn 5, revealing the pairing gap opens at T p~5K. | Session 14: Cerium-Based Heavy Fermion Metals |

167 | Resonances in thermal conductivity of superconducting CeCoIn5 in rotating magnetic field | Kim, Duk Young; Lin, Shizeng; Bauer, Eric; Ronning, Filip; Movshovich, Roman | We performed thermal conductivity measurements of d-wave superconducting CeCoIn 5 in magnetic field up to 12 Tesla rotating in the a-b plane of this tetragonal compound, in a dilution refrigerator. | Session 14: Cerium-Based Heavy Fermion Metals |

168 | Thermal expansion of heavy-fermion CeRhIn5 under pressure | Seo, Soonbeom; Thomas, Sean; Ronning, Filip; Bauer, Eric; Thompson, Joe; Rosa, Priscila | Here we probe the CEF scheme of CeRhIn 5 via thermal expansion measurements under pressure using the strain gauge method at high temperature and optical fiber sensors at low temperature. | Session 14: Cerium-Based Heavy Fermion Metals |

169 | Ferromagetic quantum critical point in heavy fermion compound CeRh6Ge4 | Shen, Bin; Zhang, Yongjun; Smidman, Michael; Nicklas, Michael; Borth, Robert; Wang, An; Lee, Hanoh; Steglich, Frank; Yuan, Huiqiu | Here we report various measurements of the ferromagnetic compound CeRh 6Ge 4 under pressure, which provide clear evidence for the existence of a ferromagnetic critical point, at which strange metal behavior is also observed [4]. | Session 14: Cerium-Based Heavy Fermion Metals |

170 | Theoretical investigation of mixed valence compound CeRh3 by means of 3d-4f resonant inelastic X-ray scattering | Sasabe, Norimasa | In this study, the spectral calculation for 3 d-4 f resonant inelastic X-ray scattering (RIXS) of CeRh 3 is shown, and the character of the final state for 3 d-4 f RIXS is clarified by paying attention to the incident X-ray energy and polarization. | Session 14: Cerium-Based Heavy Fermion Metals |

171 | Low temperature characterization of single crystalline Ce2Ni2In | Maiwald, Jannis; Aronson, Meigan | In this talk we will introduce Ce 2Ni 2In, as a new single crystalline addition to the 221 family of materials. | Session 14: Cerium-Based Heavy Fermion Metals |

172 | Frist Principles Study of the Fermi Surface Topology of CeCu2Si2 | Tutchton, Roxanne; Si, Qimiao; Zhu, Jian-Xin | We have performed an analysis of the electronic structure and the Fermi surface topology by varying the interaction strength and taking into account the crystal-field splitting. | Session 14: Cerium-Based Heavy Fermion Metals |

173 | Quantum Criticality from Sequential Destruction of SU(4) Spin-Orbital-coupled Kondo Effect* | Buehler-Paschen, Silke; Liu, Chia-Chuan; Cai, Ang; Nica, Emilian; Yu, Rong; Ingersent, Kevin; Si, Qimiao | Here we report an analytical renormalization group calculation of the model with Ising anisotropy, using a Coulomb-gas representation. | Session 14: Cerium-Based Heavy Fermion Metals |

174 | X-ray and neutron-diffraction studies of the CeOs4Sb12 valence transition at low temperatures and high magnetic fields | Singleton, John; Goetze, Kathrin; Pearce, Matthew; Islam, Zahirul; Welp, Ulrich; Goddard, Paul; Johnson, Roger; Manuel, Pascal; Maple, M Brian; Ho, Pei-Chun | X-ray and neutron-diffraction studies of the CeOs4Sb12 valence transition at low temperatures and high magnetic fields | Session 14: Cerium-Based Heavy Fermion Metals |

175 | Growth of the Transparent Correlated Metal SrVO3 | Shoham, Lishai; Baskin, Maria; Han, Myung-Geun; Zhu, Yimei; Kornblum, Lior | In this work we present low defect SrVO 3 films with residual resistivity ratios exceeding 10 and room temperature resistivities in the order of 30 µΩ cm. | Session 15: Complex Oxide Films, Surfaces, and Interfaces |

176 | Magnetic properties in strained PrVO3 thin films | Prellier, Wilfrid | At the end, I will propose a model based on dead layer to explain the data. | Session 15: Complex Oxide Films, Surfaces, and Interfaces |

177 | Phase transformation by superoxygenation in cuprate and iridate thin films | Zhang, Chao; Zhang, Hao; Gauquelin, Nicolas; Cheng, Shaobo; Botton, Gianluigi; McMahon, Christopher; Hawthorn, David; Clancy, Patrick; Chun, Saehwan; Seo, Ambrose; Kim, Young-June; Wei, John | We extend this superoxygenation technique to materials in thin film form since they are more reactive due to their large surface-to-volume ratio. | Session 15: Complex Oxide Films, Surfaces, and Interfaces |

178 | Coupling lattice instabilities across the interface in ultrathin oxide heterostructures | van Thiel, Thierry; Fowlie, Jennifer; Autieri, Carmine; Manca, Nicola; Siskins, Makars; Afanasiev, Dmytro; Gariglio, Stefano; Caviglia, Andrea | We investigate its origin through synchrotron X-ray diffraction measurements, electronic transport and ab-initio calculations. | Session 15: Complex Oxide Films, Surfaces, and Interfaces |

179 | Structure of SrRuO3 films on SrTiO3 (001) in the ultrathin limit | Siwakoti, Prahald; Saghayezhian, Mohammad; Wang, Zhen; Zhu, Yimei; Plummer, E; Zhang, Jiandi | We discuss the lattice distortion effect on the Dzyaloshinskii – Moriya interaction in the system. | Session 15: Complex Oxide Films, Surfaces, and Interfaces |

180 | Electronic and lattice coupling in thin films of Nd1-xLaxNiO3 | Fowlie, Jennifer; Mundet, Bernat; Georgescu, Alexandru Bogdan; Dominguez Ordonez, Claribel; Gibert, Marta; Triscone, Jean-Marc | Using an intermittant sputtering technique, we grow high quality epitaxial thin films of this solid solution on various substrates and, in this way, achieve an analog control of the composition. | Session 15: Complex Oxide Films, Surfaces, and Interfaces |

181 | Co valence transformation in isopolar LaCoO3 / LaTiO3 perovskite heterostructures via interfacial engineering | Araizi-Kanoutas, Georgios; Geessinck, Jaap; Gauquelin, Nicolas; Smit, Steef; Verbeek, Xanthe; Mishra, Shrawan; Bencok, Peter; Schlueter, Christoph; Lee, Tien-Lin; Krishnan, Dileep; Verbeeck, Jo; Rijnders, Guus; Koster, Gertjan; Golden, Mark | We provide robust evidence of systematic and controllable conversion of trivalent to divalent cobalt that occurs within an interfacial region of three unit cells in LaCoO 3 as a direct result of the ensuing Fermi energy mismatch, without the presence of dopants or structural modification, in agreement with the theoretical prediction. | Session 15: Complex Oxide Films, Surfaces, and Interfaces |

182 | Long-range ordered domain walls in MBE-grown BiFeO3 thin films and manipulation of their electrical properties | Tang, Yongjian; Mei, Antonio; Schubert, Jürgen; Saremi, Sahar; Miao, Ludi; Martin, Lane; Schlom, Darrell; Ralph, Daniel | We have investigated the use of adsorption-controlled molecular-beam epitaxy to grow BiFeO 3 thin films, as an alternative to the more commonly-used pulsed laser deposition or sputtering. | Session 15: Complex Oxide Films, Surfaces, and Interfaces |

183 | Properties of the BiVO4 (010) surface in single crystals and epitaxially grown samples: A joint first-principles and experimental effort | Wang, Wennie; Strohbeen, Patrick; Lee, Dongho; Zhou, Chenyu; Kawasaki, Jason; Choi, Kyoung-Shin; Liu, Mingzhao; Galli, Giulia | Here, we present an integrated experimental and computational study aimed at an atomistic understanding of the surface morphology and electronic properties of BiVO 4 as a function of oxygen vacancy concentration. | Session 15: Complex Oxide Films, Surfaces, and Interfaces |

184 | Multi-level ionic conductivity in Ca-doped BiFeO3 thin films | Suh, Jeonghun; Lim, Ji Soo; Park, Heung-Sik; Yang, Chan-Ho | We conduct impedance analysis with different magnitudes of AC voltage to understand the ionic conduction mechanism of this material. | Session 15: Complex Oxide Films, Surfaces, and Interfaces |

185 | Observation of anisotropic filamentary conduction pathways in Ca-doped bismuth ferrite thin films | Park, Heung-Sik; Lim, Ji Soo; Suh, Jeonghun; Yang, Chan-Ho | We investigate the evolution of the ionic conduction pathways based on optical contrast in an epitaxial Bi 0.7Ca 0.3FeO 3-δ thin film where oxygen vacancies are spontaneously produced. | Session 15: Complex Oxide Films, Surfaces, and Interfaces |

186 | Charge transport and distribution at the interfaces of SrTiO3/LaAlO3/SrTiO3 (100) (STO/LAO/STO (100)) | Singh, Akhilesh; Su, C.P.; Wu, T.C.; Chen, M.C.; Song, M.Y.; Lai, Y.C.; Guo, Guang-Yu; Chu, M.-W; Lee, Wei-Li | In this report, the STO(6-uc)/LAO(t-uc)/STO (100) samples with t = 5 and 3 were grown using oxide MBE technique. | Session 15: Complex Oxide Films, Surfaces, and Interfaces |

187 | Observation of polar domains in a relaxor La-substituted BiFeO3 thin film | YEO, Youngki; Kim, Yong-Jin; You, Mujin; Yang, Chan-Ho | In this work, we report the direct observation of PNRs within tetragonal BiFeO 3 near morphotropic phase boundaries (MPBs) which are expected to involve large strain gradient. | Session 15: Complex Oxide Films, Surfaces, and Interfaces |

188 | The linear electro-optical effect in thin oxide films | Demkov, Alexander; Hamze, Ali; Li, Wente; Paoletta, Therese; Fredrickson, Kurt | In this talk we will discuss general design rules for developing strong Pockels materials inferred from first principles theory. | Session 15: Complex Oxide Films, Surfaces, and Interfaces |

189 | Symmetry breaking of in-plane anisotropic magnetoresistance with temperature in La-doped Sr2IrO4 film | Liu, Mingrui; xue, hongxia; Meng, Jianchao; Bai, Ruipeng; Jiang, Weimin; Zhang, Zhe; Ling, Jingzhuo; He, Lin; Dou, Ruifen; Xiong, Changmin; Nie, Jiacai | In this study, a 14-nm thick La-doped Sr 2 IrO 4 film was grown on a (001) SrTiO 3 substrate. | Session 15: Complex Oxide Films, Surfaces, and Interfaces |

190 | Rock-salt type superconductor/ferromagnet heteroepitaxial junction: LaO/EuO | Kaminaga, Kenichi; Oka, Daichi; Oka, HIrofumi; Fukumura, Tomoteru | We report the first synthesis of rock-salt type superconductor/ferromagnet heteroepitaxial junctions using ferromagnetic semiconductor EuO [1]. | Session 15: Complex Oxide Films, Surfaces, and Interfaces |

191 | Growth and electronic structure of LTO/STO heterostructure: Multi-modal studies | Hong, Hawoong; Wrobel, Friederike; YAN, XI; Bhattacharya, Anand; Fong, Dillon | Growth and electronic structure of LTO/STO heterostructure: Multi-modal studies | Session 15: Complex Oxide Films, Surfaces, and Interfaces |

192 | Coherent lattice motion in freestanding perovskite films probed by ultrafast electron diffraction | Su, Yifan; Zong, Alfred; Kogar, Anshul; Lu, Di; Hong, Seung Sae; Hwang, Harold; Gedik, Nuh | Following photoexcitation, we observed a 0.15 THz acoustic phonon extracted from Bragg peak intensity, position and width. | Session 15: Complex Oxide Films, Surfaces, and Interfaces |

193 | Stoichiometry-Dependence of Electronic Properties in LaVO3 Thin Films | ZHANG, BIWEN; Holleman, Jade; Xin, Yan; McGill, Stephen; Beekman, Christianne | We find that while V-rich films show behaviors that are similar to bulk LVO, films that are La-rich show remarkable differences in optical measurements, and more rich temperature dependent transport behaviors, which indicates the presence of electronic phase separation. | Session 15: Complex Oxide Films, Surfaces, and Interfaces |

194 | Oxygen vacancy induced electronic phenomena of KTaO3 | Ojha, Shashank Kumar; Gogoi, Sanat Kumar; Jain, Manish; Middey, Srimanta | In this work, we report on sole effect of oxygen vacancy on electronic structure modification of a prototypical perovskite KTaO 3 by deliberately creating oxygen vacancies in a pristine single-crystalline sample. | Session 15: Complex Oxide Films, Surfaces, and Interfaces |

195 | Effect of Growth Conditions on the Formation of a 2-Dimensional Electron Gas at Antiferromagnetic LaCrO3 /SrTiO3 Interfaces | Al-Tawhid, Athby | To realize such an interface, we examine the effect of growth conditions and post growth treatment on the structural and electronic properties of the polar/non-polar(LCO/STO) interfaces. | Session 15: Complex Oxide Films, Surfaces, and Interfaces |

196 | Interfacial mechanical coupling at the interface of Pb0.2Zr0.8TiO3/LaNiO3/SrTiO3 heterostructures | Lau, Claudia; Visani, Cristina; Albright, Stephen; Zhang, Zhan; Disa, Ankit; Kumah, Divine; Ahn, Charles; Walker, Frederick | Interfacial mechanical coupling at the interface of Pb0.2Zr0.8TiO3/LaNiO3/SrTiO3 heterostructures | Session 15: Complex Oxide Films, Surfaces, and Interfaces |

197 | Zero-Bias Anomalies Observed in the Tunneling Spectra of Sr3(Ru0.84Mn0.16)2O7 | Yang, Yifan; Fu, Mingming; Zou, Qiang; Jin, Rongying; Gai, Zheng; Zhang, Jiandi; Plummer, E | Here, we report the observation of a well-defined symmetric zero-bias anomaly (ZBA) at 5.2 K in the scanning tunneling spectroscopy (STS) of x = 0.16. | Session 15: Complex Oxide Films, Surfaces, and Interfaces |

198 | Tuning the electronic properties of the 4d transition metal oxide LaRhO3 | Jiang, Juan; Lee, TaeKyun; Lee, Sangjae; Ismail-Beigi, Sohrab; Walker, Frederick; Ahn, Charles | Tuning the electronic properties of the 4d transition metal oxide LaRhO3 | Session 15: Complex Oxide Films, Surfaces, and Interfaces |

199 | Engineering Coercivity of SrRuO3 thin film by SrTiO3 capping layer | Ko, Eun Kyo; Mun, Junsik; Lee, Han-Gyeol; Kim, Jinkwon; Kim, Miyoung; Wang, Lingfei; Noh, Tae Won | By controlling the thickness and growth oxygen partial pressure of STO capping layer, we can tune the H C of SRO films by an amplitude over 100%. | Session 15: Complex Oxide Films, Surfaces, and Interfaces |

200 | Effects of Tungsten Doping on Magnetic and Material Properties of VO2/Ni Bilayers | Sutton, Logan; De La Venta, Jose; Lauzier, Joshua | In this study, a sol-gel synthesis technique was used to fabricate W-doped VO 2/Ni bilayers. | Session 15: Complex Oxide Films, Surfaces, and Interfaces |

201 | Pulsed-laser epitaxy of metallic delafossite PdCrO2 | Ok, Jong Mok; Brahlek, Matthew; Choi, Woo Seok; Roccapriore, Kevin; Chisholm, Matthew; Rimal, Gaurab; Kim, Soyeun; Sohn, Changhee; Skoropata, Elizabeth; Oh, Seongshik; Lee, Ho Nyung | Here, we report the epitaxial growth of the metallic delafossite PdCrO 2 by pulsed laser deposition (PLD) across many different substrates and epitaxial buffer layers and growth conditions. | Session 15: Complex Oxide Films, Surfaces, and Interfaces |

202 | Growth of metallic delafossite PdCoO2 by molecular beam epitaxy | Brahlek, Matthew; Rimal, Gaurab; Ok, Jong Mok; Mukherjee, Debangshu; Mazza, Alessandro; Qiyang, lu; Lee, Ho Nyung; Ward, Thomas; Unocic, Raymond; Eres, Gyula; Oh, Seongshik | Here, we report successful growth of the metallic delafossite PdCoO2 by molecular beam epitaxy (MBE) [1]. | Session 15: Complex Oxide Films, Surfaces, and Interfaces |

203 | Molecular Modeling of the Adsorption-Induced Expansion of Graphene Oxide Frameworks | Lombardi, Todd; Schaeperkoetter, Joseph; Albesa, Alberto; Wexler, Carlos | We present the results of molecular dynamics simulations based on ab initio models of GOFs. | Session 15: Complex Oxide Films, Surfaces, and Interfaces |

204 | Time-reversal-invariant Weyl semimetals indicated by symmetry indictors and invariants | Qian, Yuting; Gao, Jiacheng; Song, Zhida; Nie, Si-Min; Wang, Zhijun; Weng, Hongming; Fang, Zhong | Here, based on the the first-principles calculations and symmetry analysis, we demonstrate that, for the TR-preversing noncentrosymmetric systems with S4 symmetry, the Weyl semimetal phase can be characterised by the nonequality between an invariant $\eta$ and an S4 indicator $z_2$. | Session 16: Computational Studies of Topological Materials |

205 | Topological crystalline insulator: from symmetry indicators to material discovery | Chang, Tay-Rong; ZHOU, XIAOTING; Hsu, Chuang-Han; Pereira, Vitor; Bansil, Arun; Xu, Suyang; Lin, Hsin; Fu, Liang | We systematically examine the topological properties of the TCI states in Ca 2As. | Session 16: Computational Studies of Topological Materials |

206 | Emergent dual topology in the three-dimensional Kane-Mele Pt2HgSe3 | Marrazzo, Antimo; Marzari, Nicola; Gibertini, Marco | Here, we extend the two-dimensional Kane-Mele model to bulk jacutingaite and unveil the microscopic origin of the gapped nodal line and the emerging crystalline topological order. | Session 16: Computational Studies of Topological Materials |

207 | Doping induced topological phase transition in Bi: The role of quantum electronic stress | Jin, Kyung-Hwan; Yeom, Han Woong; Liu, Feng | Surprisingly, using first-principles calculations, here we demonstrate an electron doping induced TPT in bulk Bi from a higher-order topological insulator (HOTI) to a TI. | Session 16: Computational Studies of Topological Materials |

208 | Possibility of topological properties in 2D cadmium chalcogenide (CdX, X = S, Se, and Te) buckled honeycomb monolayer on substitutional doping | Chattopadhyay, Sutapa; Kshirsagar, Anjali | Two-dimensional honeycomb monolayers doped with tin atoms are designed from (111) surface of bulk zinc blende structures of cadmium chalcogenides using first principles density functional theory based calculations. | Session 16: Computational Studies of Topological Materials |

209 | The electronic and topological properties of plumbene by first-principles calculations | Li, Yue; Yang, Zhongqin | Combining tight-binding (TB) models with first-principles calculations, we investigate the electronic and topological properties of plumbene. | Session 16: Computational Studies of Topological Materials |

210 | Topological States in β-PbO2? | Mahatara, Sharad; Kiefer, Boris | In our work, we use a self-consistent DFT+U approach and find stochiometric β-PbO 2 to be an indirect semiconductor with a band gap of ~0.8 eV, similar to experiment. | Session 16: Computational Studies of Topological Materials |

211 | Mode-Selective Spontaneous Oscillation of Bandgap in Dirac Wedge Semimetals | Song, Zhigang | This article studies the time-dependent behavior of semimetal Zr 3AgX 3F 20 [X=Cd and Hg], M(MoS) 3 and M(MoSe) 3 [M=Li, Na, K, Rb, Tl, In, I] using time-dependent density functional theory. | Session 16: Computational Studies of Topological Materials |

212 | Application of Convolutional Neural Network to Quantum Percolation in Topological Insulators | Ohtsuki, Tomi; Mano, Tomohiro | Here we study the topological insulators with random vacancies, namely the quantum percolation in topological insulators, by analyzing the wave functions via convolutional neural network. | Session 16: Computational Studies of Topological Materials |

213 | Predicting Topological Properties of Quantum Materials via Statistical Methods | Mertz, Thomas; Zantout, Karim; Valenti, Roser | We discuss the topological phases of correlated and non-correlated (insulating) quantum materials using a statistical method that explores the entire phase space. | Session 16: Computational Studies of Topological Materials |

214 | Strong-coupling superconductivity and pseudogap in topological flat bands: a quantum Monte Carlo study | Hofmann, Johannes; Berg, Erez; Chowdhury, Debanjan | We study a two-dimensional model of an isolated narrow topological band at partial filling with local attractive interactions. | Session 16: Computational Studies of Topological Materials |

215 | Role of van der Waals interactions in topological insulators: bulk, surface and interfaces | Shirali, Karunya Shailesh; Shelton, William; Vekhter, Ilya | We attribute these differences to the importance of the long range r -6 tail of the vdW interaction, and we discuss its relevance for the properties of topological interfaces. | Session 16: Computational Studies of Topological Materials |

216 | Topological Phases in Hydrogenated Group 13 Monolayers | Barik, Ranjan; Kumar, Ritesh; Singh, Abhishek | Using an effective k.p model, symmetry analysis and group theoretical approach with first-principles calculations we studied the topological properties of hydrogenated gallenene (gallenane) and other group 13 elements. | Session 16: Computational Studies of Topological Materials |

217 | Robust descriptor for high-throughput discovery of alloyed topological insulators based on artificial intelligence | Cao, Guohua; Ouyang, Runhai; Ghiringhelli, Luca; Scheffler, Matthias; Liu, Huijun; Carbogno, Christian; Zhang, Zhenyu | To date, these approaches have been applied to materials in existing databases, and are severely limited to systems with well-defined symmetries, leaving a much larger materials space unexplored. | Session 16: Computational Studies of Topological Materials |

218 | A defect TQFT approach to fractons | Aasen, David; Bulmash, Daniel; Prem, Abhinav; Slagle, Kevin; Williamson, Dominic | We explicitly construct many well known examples of fracton phases and a few new models using the defect construction. | Session 17: Construction and detection of topological orders |

219 | Anomalous surfaces of fracton phases | Schuster, Thomas; Tantivasadakarn, Nathanan; Vishwanath, Ashvin; Yao, Norman | In this talk, we demonstrate that boundaries of well-known fracton models feature anomalous constraints arising from the emergent conservation laws that govern the bulk fracton order, in a manner similar to 2D topological orders such as the toric code. | Session 17: Construction and detection of topological orders |

220 | Multipole gauge theory for fracton phases | Gromov, Andrey | I will describe an effective field theory approach to the fracton order. | Session 17: Construction and detection of topological orders |

221 | Geodesic string condensation from symmetric tensor gauge theory: a unifying framework of holographic toy models | Yan, Han | In this talk we reason that there is a universal picture for several different holographic toy model constructions, and a gravity-like bulk field theory that gives rise it. | Session 17: Construction and detection of topological orders |

222 | Localized representation and surface signature of Hopf insulators. | Nelson, Aleksandra; Alexandradinata, Aris; Soluyanov, Alexey | We propose that Wannier functions are exponentially localized and preserve the symmetries of the system. | Session 17: Construction and detection of topological orders |

223 | Lattice models that realize Zn-1-symmetry protected topological states for even n | Tsui, Lokman; Wen, Xiao-Gang | We study the lattice model of Z n-1-symmetry protected topological states (1-SPT) in 3+1D for even n. | Session 17: Construction and detection of topological orders |

224 | Strong 3D planar subsystem symmetry-protected topological phases and their dual fracton orders | Devakul, Trithep; Shirley, Wilbur; Wang, Juven | We classify subsystem symmetry-protected topological (SSPT) phases in 3+1D protected by planar subsystem symmetries: short-range entangled phases which are dual to long-range entangled abelian fracton topological orders via a generalized `gauging’ duality. | Session 17: Construction and detection of topological orders |

225 | Coupled wire constructions of 3D topological phases | Sullivan, Joseph | We present a general coupled wire construction in 3D in an effort to study novel topological phases of matter. | Session 17: Construction and detection of topological orders |

226 | Modeling Electron Fractionalization with Unconventional Fock Spaces | Cobanera, Emilio | As an application of potential mesoscopic interest, I investigate numerically the hybridization of Majorana and parafermion zero-energy edge modes caused by fractionalizing but charge-conserving tunneling. | Session 17: Construction and detection of topological orders |

227 | Fractionalization and Anomalies in Symmetry-Enriched U(1) Gauge Theories | Zou, Liujun; Ning, Shang-Qiang; Cheng, Meng | We classify symmetry fractionalization and anomalies in a 3+1d U(1) gauge theory enriched by a global symmetry group G. | Session 17: Construction and detection of topological orders |

228 | Coupled Wire Model of Z2 × Z2 Orbifold Quantum Hall States | Tam, Pok Man; Hu, Yichen; Kane, Charles | The orbifold states constructed here are complementary to the Z 4 orbifold states, whose neutral edge theory is described by orbifold CFT with odd integer p and contains a Z 4 fusion algebra. | Session 17: Construction and detection of topological orders |

229 | Properties of the Dice-Lattice and its Ribbons | Soni, Rahul; Kaushal, Nitin; Dagotto, Elbio; Okamoto, Satoshi | Previous theoretical studies established the existence of nearly flat bands with non-zero Chern numbers in the dice lattice using non-interacting electrons in the presence of spin-orbit coupling and magnetic field [1]. | Session 17: Construction and detection of topological orders |

230 | Anyonic partial transpose | Shapourian, Hassan; Mong, Roger; Ryu, Shinsei | In this talk, I will present our attempts to generalize partial transpose to anyons with fractional statistics. | Session 17: Construction and detection of topological orders |

231 | Detecting Topological Order at Finite Temperature Using Entanglement Negativity | Lu, Tsung-Cheng; Hsieh, Timothy; Grover, Tarun | We propose a scheme to diagnose finite temperature topological order using the long-range component of entanglement negativity, dubbed topological entanglement negativity. | Session 17: Construction and detection of topological orders |

232 | Aharonov-Bohm Effect without Using Vector Potential | LI, XIANG; Hansson, Hans; Ku, Wei | Here, we demonstrate that this effect can be completely accounted for by consideration of the gauge invariant magnetic field only, if the entire system is included in the analysis. | Session 17: Construction and detection of topological orders |

233 | Phonon-Induced Emergent Charge Order in Cuprates | Banerjee, Saikat; Atkinson, Bill; Kampf, Arno | Here we propose a mechanism which traces the charge-density wave formation in underdoped cuprates to the incipient softening of a bond-buckling phonon. | Session 18: Copper Oxides: Superconductivity and Charge Order |

234 | Superconducting order in the doped Holstein model | Bradley, Owen; Scalettar, Richard; Batrouni, George; Cohen-Stead, Benjamin | We use Quantum Monte Carlo simulations to explore the onset of SC order in doped systems through measurements of the s-wave pair susceptibility. | Session 18: Copper Oxides: Superconductivity and Charge Order |

235 | Charge Density Wave and Superconductivity in the Disordered Holstein Model | Xiao, Bo; Costa, Natanael; Khatami, Ehsan; Batrouni, George; Scalettar, Richard | Here we extend this physics to explore electron-phonon interactions and show, via exact quantum Monte Carlo simulations, that the suppression of the charge density wave correlations in the half-filled Holstein model by disorder can stabilize a superconducting phase. | Session 18: Copper Oxides: Superconductivity and Charge Order |

236 | Charge ordering due to topological reconstruction of the Fermi surface | Radić, Danko; Kadigrobov, Anatoly; Bjeliš, Aleksa | We show that topological reconstruction of the Fermi surface (FS), appearing as a consequence of spontaneously created CDW of such wave vector to bring closed electron pockets to touching, lowers the total energy of electron condensate. | Session 18: Copper Oxides: Superconductivity and Charge Order |

237 | Enhanced electron-phonon coupling for charge-density-wave formation in La1.8-xEu0.2SrxCuO4 | Peng, Yingying; Husain, Ali; Mitrano, Matteo; Sun, Xiaolan; Johnson, Thormas; Zakrzewski, Alexander; MacDougall, Greg; Barbour, Andi; Jarrige, Ignace; Bisogni, Valentina; Abbamonte, Peter | Here we present the first RIXS study of the CDW and Cu-O bond-stretching phonons in La 1.8-xEu 0.2Sr xCuO 4 compounds. | Session 18: Copper Oxides: Superconductivity and Charge Order |

238 | Observation of two types of charge-density-wave orders in superconducting La2-xSrxCuO4 | Wen, Jiajia; Huang, Hai; Lee, Sang Jun; Jang, Hoyoung; Knight, Jason; Lee, Young; Fujita, Masaki; Suzuki, K. M.; Asano, Shun; Kivelson, Steven; Kao, Chi-Chang; Lee, Jun-Sik | Here we use resonant soft X-ray scattering to study the CDW order in superconducting La 2-xSr xCuO 4 (LSCO) over a broad doping range. | Session 18: Copper Oxides: Superconductivity and Charge Order |

239 | Observation of an extended charge density wave boundary beyond the LTT phase in optimally doped LBCO | Lee, Sang Jun; Lee, Sangjun; Huang, Hai; Joe, Young-Il; Doriese, William; Knight, Jason; Lu, Donghui; Ullom, Joel; Szypryt, Paul; Swetz, Daniel; Abbamonte, Peter; Lee, Jun-Sik | Here, we present a resonant soft X-ray scattering (RSXS) study of CDW in optimally-doped LBCO, where we utilized a novel TES spectrometer with unprecedented sensitivity. | Session 18: Copper Oxides: Superconductivity and Charge Order |

240 | Doping dependence study of CDW and its excitations via high resolution RIXS | Lu, Haiyu; Hepting, Matthias; Hashimoto, Makoto; Chen, Su-Di; Ishida, Shigeyuki; yoshida, yoshiyuki; Eisaki, Hiroshi; Nag, Abhishek; Garcia-Fernandez, Mirian; Arpaia, Riccardo; Ghiringhelli, Giacomo; Braicovich, Lucio; Moritz, Brian; Huang, Edwin; Kummer, Kurt; Brookes, Nicholas; Zhou, Kejin; Shen, Zhixun; Devereaux, Thomas; Lee, Wei-Sheng | To gain further insights, it is necessary to conduct a comprehensive doping and temperature dependence study. | Session 18: Copper Oxides: Superconductivity and Charge Order |

241 | Resonant x-ray scattering studies of nematicity and charge order in the La-based superconducting cuprates | Boyle, Timothy; Walker, Morgan; Zhao, Zitong; Moore, William; Da Silva Neto, Eduardo; Ruiz, Alejandro; Frano, Alex; Blanco-Canosa, Santiago; Li, Zhao; Guo, Hanjie; Komarek, Alexander; Schüßler-Langeheine, Christian; Schierle, Enrico; Sutarto, Ronny; He, Feizhou; Boschini, Fabio | In this study we use resonant x-ray scattering (RXS) to probe the energy and temperature dependent CDW correlations. | Session 18: Copper Oxides: Superconductivity and Charge Order |

242 | X-ray scattering study of the role of charge-order in enhancing the superconducting transition | Leroux, Maxime; Islam, Zahirul; Mishra, Vivek; Ruff, Jacob; Tranquada, John; Smylie, Matthew; Niraula, Prashanta; Kayani, Asghar; Gu, Genda; Kwok, Wai-Kwong; Welp, Ulrich | We combined proton irradiation (PI) and x-ray scattering to controllably tune and probe the competition between superconductivity (SC) and spatially modulated orders (e.g. charge order, CO). | Session 18: Copper Oxides: Superconductivity and Charge Order |

243 | Time-resolved resonant soft x-ray scattering study on charge density wave in YBCO | Jang, Hoyoung; Kim, Minseok; Eom, Intae; Fujita, Masaki; Lee, Jun-Sik | In this study, we have investigated the temporal dynamics of the CDW in YBa 2Cu 3O 6+x single crystal using time-resolved resonant soft x-ray scattering (tr-RSXS) at the newly developed RSXS endstation of the PAL-XFEL. | Session 18: Copper Oxides: Superconductivity and Charge Order |

244 | Search for charge density wave order in (Y1-xPrx) Ba2Cu307 | Sasmal, Kalyan; Ruiz, Alejandro; Gunn, Brandon; Lee, Jun-Sik; McChesney, Jessica; Rodolakis, Fanny; Frano, Alex; Maple, M Brian | We report on the growth and characterization of single crystals of Y 1-xPr xBa 2Cu 30 7 cuprate superconductors with 0 < x < 1.0 by means of XRD, magnetic susceptibility, and electrical resistivity measurements, as well as RSXS measurements performed to probe the relationship between CDW order, the pseudogap, and high Tc superconductivity in this unexplored system. | Session 18: Copper Oxides: Superconductivity and Charge Order |

245 | Visualizing charge ordering in a charge-transfer insulating cuprate | Zeljkovic, Ilija; Zhao, He; Ren, Zheng; Rachmilowitz, Bryan; Schneeloch, John; Zhong, Ruidan; Gu, Genda; Wang, Ziqiang | Our work provides strong evidence that charge ordering in cuprates is unlikely to be related to the pseudogap phase. | Session 18: Copper Oxides: Superconductivity and Charge Order |

246 | The effect of magnetic field on the charge density wave in La2−xSrxCuO4 near the critical end point | Zhu, Mengze; Petsch, Alexander; Ivashko, Oleh; Blackburn, Elizabeth; Cane, Lauren; von Zimmermann, Martin; Hayden, Stephen | Here, we study the effects of a magnetic field on the CDW of La 2−xSr xCuO 4 ( x = 0.132), a composition close to the end point of the SDW where no SDW is observed at zero field. | Session 18: Copper Oxides: Superconductivity and Charge Order |

247 | Temperature dependence of the Mott gap in single-layer 1T-TaSe2 revealed by scanning tunneling spectroscopy | Ruan, Wei; Chen, Yi; Hwang, Jinwoong; Tang, Shujie; Lee, Ryan; Tsai, Hsin-Zon; Kahn, Salman; Liou, Franklin; Aikawa, Andrew; Shen, Zhixun; Mo, Sung-Kwan; Crommie, Michael | Here we use scanning tunneling microscopy/spectroscopy to investigate the temperature dependence of the electronic structure of the single-layer Mott insulator 1T-TaSe 2 which has a much more modest Mott gap of ~ 0.1 eV. | Session 19: Correlated 2D Materials and Models |

248 | Manipulation of electron-phonon energy transfer pathways in 2D transition metal dichalcogenides through ultrafast excitation | Cating-Subramanian, Emma; Gentry, Christian; Shi, Xun; Zhang, Yingchao; You, Wenjing; Ryan, Sinead; Varner, Baldwin; Rossnagel, Kai; 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 19: Correlated 2D Materials and Models |

249 | Negative Parabolic Magneto-resistance in a strongly interacting 2D Hole system in GaAs/AlGaAs | Kumar, Arvind Shankar; Liu, Chieh-Wen; Liu, Shuhao; Pfeiffer, Loren; West, Kenneth; Gao, Xuan | We study the extracted hole-hole interaction correction to Drude conductivity in this regime and compare its temperature dependence to conventional Fermi Liquid theories. | Session 19: Correlated 2D Materials and Models |

250 | Theory of Strain Effects on Extremely Correlated Metals in Two-dimensions | Arciniaga, Michael; Mai, Peizhi; Shastry, B | We study the strain dependence of anisotropic resistivity [1] within the t-t’-J model, applicable to cuprate superconductors. | Session 19: Correlated 2D Materials and Models |

251 | Construction and classification of point group symmetry protected topological phases in 2D interacting fermionic systems | Zhang, Jianhao; Wang, Qing-Rui; Yang, Shuo; Qi, Yang; Gu, Zhengcheng | In this paper, we attempt to generalize this classification and construction scheme into interacting fermion systems systematically. | Session 19: Correlated 2D Materials and Models |

252 | The Non-Gaussian Exact Diagonalization Method and Its Application to the 2D Hubbard-Holstein Model | Wang, Yao; Esterlis, Ilya; Shi, Tao; Cirac, Juan; Demler, Eugene | We propose a novel numerical method that embeds the variational non-Gaussian wavefunction approach with exact diagonalization, allowing for efficient treatment of correlated systems with both electron-electron and electron-phonon interactions. | Session 19: Correlated 2D Materials and Models |

253 | Electro-magnetic duality in 2D topological orders with gapped boundaries | Wang, Hongyu; Li, Yingcheng; Hu, Yuting; Wan, Yidun | To achieve our goal, we Fourier transform the extended QD model defined on the lattice with boundaries. | Session 19: Correlated 2D Materials and Models |

254 | Catastrophe theory classification of Fermi surface topological transitions in two dimensions | Chandrasekaran, Anirudh; Shtyk, Oleksandr; Betouras, Joseph; Chamon, Claudio | We classify all possible singularities in the electronic dispersion of two-dimensional systems that occur when the Fermi surface changes topology, using catastrophe theory. | Session 19: Correlated 2D Materials and Models |

255 | Symmetry protected long-lived excitations and tomographic dynamics in 2D electron fluids | Ledwith, Patrick; Guo, Haoyu; Levitov, Leonid | We will discuss the peculiar collective behavior in two-dimensional Fermi gases arising from head-on carrier-carrier collisions. | Session 19: Correlated 2D Materials and Models |

256 | Hydrodynamic electron flow in 2D semiconductor heterostructures | Keser, Aydin; Wang, Daisy; Klochan, Oleh; Ho Yew Hung, Derek; Adam, Shaffique; Culcer, Dimitrie; Hamilton, Alex; Sushkov, Oleg | We propose simple geometries to directly test hydrodynamic flow in 2D electron systems by longitudinal resistance measurements. | Session 19: Correlated 2D Materials and Models |

257 | Atypical Behavior of Collective Modes in Two-Dimensional Fermi Liquids | Gochan, Matthew; Heath, Joshuah; Bedell, Kevin | In this talk we apply the Landau kinetic equation to a two-dimensional Fermi liquid and discuss the consequences of the reduced dimensionality on the behavior of the collective modes. | Session 19: Correlated 2D Materials and Models |

258 | A determinantal quantum Monte Carlo study of deconfined quantum criticality | Wang, Chao; Schattner, Yoni; Kivelson, Steven | We present evidence for a deconfined quantum critical point between antiferromagnetic and columnar valence-bond solid phases and examine the properties of the critical point. | Session 19: Correlated 2D Materials and Models |

259 | Metal insulator transition induced by magnetic field in GdTe | Cai, Xinqiang; Xu, Zhilin; Zhou, Zuoping; Huang, Wan-tong; Ji, Shuaihua; Chen, Xi | We grow GdTe thin films by molecular beam epitaxy (MBE) and study their properties by scanning tunneling microscopy (STM) and magnetic property measurement. | Session 19: Correlated 2D Materials and Models |

260 | Spin chains with long range RKKY interaction | Yang, Luhang; Feiguin, Adrian | To reconcile these two pictures we interpret magnons as bound states of spinons. | Session 20: Correlated Chains and 1D Models |

261 | Dynamics of a tunable spin chain with three-body interactions | Adhikari, Khagendra; Beach, Kevin | We formulate a projective Monte Carlo scheme for a spin-half chain with tunable 3-body interactions that encompass the Fredkin model and its t-deformed extension. | Session 20: Correlated Chains and 1D Models |

262 | Universality and Quantum Criticality in Quasiperiodic Spin Chains | Agrawal, Utkarsh; Vasseur, Romain; Gopalakrishnan, Sarang | 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 20: Correlated Chains and 1D Models |

263 | Universal Spin Dynamics in Infinite-Temperature One-Dimensional Quantum Magnets | Dupont, Maxime; Moore, Joel | We address the nature of spin dynamics in various integrable and non-integrable, isotropic and anisotropic quantum spin-S chains, beyond the paradigmatic S=1/2 Heisenberg model. | Session 20: Correlated Chains and 1D Models |

264 | Excitations of critical quantum spin chains from non-equilibrium classical dynamics | Vinet, Stéphane; Longpré, Gabriel; Witczak-Krempa, William | We study critical quantum spin chains with spin 1/2 that are dual to the non-equilibrium dynamics of a classical spin chain coupled to a bath. | Session 20: Correlated Chains and 1D Models |

265 | Critical quantum spin chains from non-equilibrium classical dynamics: level statistics and entanglement entropy | Longpré, Gabriel; Vinet, Stéphane; Witczak-Krempa, William | Critical quantum spin chains from non-equilibrium classical dynamics: level statistics and entanglement entropy | Session 20: Correlated Chains and 1D Models |

266 | 1D spin chain with topologically constrained dynamics | Dai, Zhehao; Nahum, Adam | We discuss a new type of quantum critical point in 1+1D realizing topologically constrained dynamics different from blastic or diffusive transport. | Session 20: Correlated Chains and 1D Models |

267 | Dynamical properties of a driven dissipative dimerized S = 1/2 chain | Normand, Bruce; Yarmohammadi, Mohsen; Meyer, Constantin; Fauseweh, Benedikt; Uhrig, Goetz | We consider the dynamical properties of a gapped quantum spin system coupled to the electric field of a laser, which drives the resonant excitation of specific phonon modes that modulate the magnetic interactions. | Session 20: Correlated Chains and 1D Models |

268 | Generalization of the Haldane conjecture to SU(n) chains | Wamer, Kyle; Lajkó, Miklós; Mila, Frederic; Affleck, Ian | In this paper, we extend these results to SU(n) chains in the symmetric representation. | Session 20: Correlated Chains and 1D Models |

269 | Constructing Low-Energy Effective Models for the Hydrogen Chain using sb-DMRG | Sawaya, Randy; White, Steven | We obtain much better models using Wannier functions constructed from an average density matrix over a small set of low lying DMRG eigenstates. | Session 20: Correlated Chains and 1D Models |

270 | Fractons from confinement in one dimension | Pai, Shriya; Pretko, Michael | Recent work has shown that two seemingly different physical mechanisms, namely fracton behavior and confinement, can give rise to non-ergodicity in one-dimensional quantum many-body systems. | Session 20: Correlated Chains and 1D Models |

271 | Emptiness Formation Probability in 1D Bose 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 20: Correlated Chains and 1D Models |

272 | One-dimensional repulsive Hubbard model with mass imbalance | He, Yuchi; Pekker, David; Mong, Roger | We investigate the phase diagram of the one-dimensional repulsive Hubbard model with mass imbalance away from half-filling. | Session 20: Correlated Chains and 1D Models |

273 | Dielectric breakdown of strongly correlated insulators in one dimension: Universal formula from non-Hermitian sine-Gordon theory | Takasan, Kazuaki; Nakagawa, Masaya; Kawakami, Norio | In this talk, we present our recent study about the dielectric breakdown of generic strongly correlated insulators in one dimension [1]. | Session 20: Correlated Chains and 1D Models |

274 | Deconfined quantum criticality in a spin chain with long-range interactions | Yang, Sibin; Yao, Dao-Xin; Sandvik, Anders | We study a 1D spin-1/2 model with long-range power-law decaying unfrustrated (bipartite) Heisenberg exchange interactions Jr ∝ r-α (for odd distances r) and a competing multi-spin interaction Q favoring a dimerized (valence-bond solid, VBS) ground state. | Session 20: Correlated Chains and 1D Models |

275 | Phase stabilization by electronic entropy in plutonium | Harrison, Neil; Betts, Jonathan; Wartenbe, Mark; Balakirev, Fedor; Richmond, Scott; Jaime, Marcelo; Tobash, Paul | The entropy originates from two competing instabilities of the $5f$-electron shell, which we show to drive the volume of Pu in opposing directions, depending on the temperature and volume. | Session 21: Correlated F-Electron Materials |

276 | Physical Properties of 1-Dimensional 4f/5f-electron Heavy Fermion Materials | Bauer, Eric; Asaba, T.; Thomas, Sean; Thompson, Joe; Rosa, Priscila; Ronning, Filip | In this talk, I will describe the thermodynamic and transport properties of several 4f and 5f quasi-1D heavy fermion materials. | Session 21: Correlated F-Electron Materials |

277 | Probing the local 4f-orbital symmetry in heavy fermion systems by linearly polarized angle-resolved core-level hard x-ray photoemission spectroscopy | Sekiyama, Akira; Fujiwara, Hidenori; Hamamoto, Satoru; Kanai-Nakata, Yuina; Imada, Shin; Tanaka, Arata; Tamasaku, Kenji; Ishikawa, Tetsuya | We have applied this technique to Ce, Pr, and Yb-based heavy fermion systems, where the Γ 7 states with Jz = ±3/2 and the Γ 8 states in the CEF-split GS 4f symmetry have been established for tetragonal YbRh 2Si 2 [2] and cubic YbB 12 [3]. | Session 21: Correlated F-Electron Materials |

278 | Pressure effect on the chiral helimagnetic order in YbNi3Al9 | Ota, Yoshihiko; Umeo, Kazunori; Otaki, Takumi; Arai, Yudai; Onimaru, Takahiro; Nakamura, Shota; Ohara, Shigeo | In this work, we have studied pressure effect on the CHM order in YbNi 3Al 9 by measuring magnetization, electrical resistivity, and magnetoresistance under hydrostatic pressures. | Session 21: Correlated F-Electron Materials |

279 | Quadrupolar fluctuations of heavy-fermion metal YbRu2Ge2 | Ye, Mai; Rosenberg, Elliott; Fisher, Ian; Blumberg, Girsh | We study the quadrupolar fluctuations of this compound by Raman scattering [Phys. | Session 21: Correlated F-Electron Materials |

280 | Thermodynamic and transport properties of Kondo lattice YbCuAs2 single crystals | Mun, Eundeok; Evans, David; Huang, Symphony | In this talk, I will present thermodynamic and transport properties of Kondo lattice YbCuAs 2 single crystals. | Session 21: Correlated F-Electron Materials |

281 | Dynamical Scaling of Charge Responses at a Kondo Destruction Quantum Critical Point | Kirchner, Stefan; Hu, Haoyu; Cai, Ang; Yu, Zuodong; Si, Qimiao | In the studies of heavy fermion metals, the notion of Kondo destruction has been developed to address this issue [1]. | Session 21: Correlated F-Electron Materials |

282 | Itinerant Nature of Ce in CeCo5 | Choudhary, Renu; Paudyal, Durga | Here, we discuss the itinerant nature of Ce in CeCo 5 using density functional theory (DFT). | Session 21: Correlated F-Electron Materials |

283 | The ground state and Fermi-surface nesting phenomenon in antiferromagnetic CeAuSb2. | JANG, JAEKYUNG; Rhee, Joo Yull | To elucidate this SDW and the ground state we investigate the electronic structure of antiferromagnetic (AFM) CeAuSb 2 using the full-potential linearized-augmented-plane-wave method. | Session 21: Correlated F-Electron Materials |

284 | Microscopic Nature of Magnetic Ground State in CeAuSb2 | Yumnam, George; Chen, Yiyao; Zhao, Yang; Thamizhavel, A.; Dhar, Sudesh; Singh, Deepak | Microscopic Nature of Magnetic Ground State in CeAuSb2 | Session 21: Correlated F-Electron Materials |

285 | Electronic and Magnetic Properties of EuNi2-xSb2 Structural Variants | Nelson, William; Jayasinghe, Ashini; Graf, David; Latturner, Susan; Baumbach, Ryan | Electronic and Magnetic Properties of EuNi2-xSb2 Structural Variants | Session 21: Correlated F-Electron Materials |

286 | Magnetically-enhanced lattice instability in EuRh2Si2 under pressure | Krishnadas, Anjana; Armstrong, Stephen; Bi, Wenli; zhao, jiyong; Alp, Esen; Kobayashi, Riki; Hedo, Masato; Nakama, Takao; Onuki, Yoshichika; Rosenbaum, Thomas; Feng, Yejun | Here, in a series of ThCr 2Si 2 structured Eu antiferromagnets, we explore the subtle interaction and cooperation between these instabilities under pressure, using synchrotron-based Mossbauer spectroscopy and optical Raman scattering to track the evolution of the magnetism and the lattice, respectively. | Session 21: Correlated F-Electron Materials |

287 | Magnetic fluctuations in the itinerant ferromagnet LaCrGe3 studied by 139La NMR | Rana, Khusboo; Kotegawa, Hisashi; Ullah, Rahim; Harvey, Jeffrey; Bud’ko, Sergey; Canfield, Paul; Tou, Hideki; Taufour, Valentin; Furukawa, Yuji | Here we present our analysis of the NMR data using self-consistent-renormalization theory and provide a comparison of this system in the generalized Rhodes-Wohlfarth plot with other similar itinerant ferromagnets. | Session 21: Correlated F-Electron Materials |

288 | Crystal field splitting and spin Hamiltonian of the quantum magnet YbCl3 | Sala, Gabriele; Stone, Matthew; Rai, Binod; Do, Seunghwan; May, Andrew; Parker, David; Halasz, Gabor; Laurell, Pontus; Okamoto, Satoshi; Butch, Nicholas; Cheng, Yongqiang; Ehlers, G.; Garlea, Vasile; Zhang, Qiang; Pokharel, Ganesh; Suriya Arachchige, Hasitha; Mandrus, David; Lumsden, Mark; Christianson, Andy | Here we study YbCl 3 with neutron scattering, magnetic susceptibility, and heat capacity measurements. | Session 21: Correlated F-Electron Materials |

289 | Quasi-1D Kondo chain in CeCo2Ga8 | Luo, Yongkang | Quasi-1D Kondo chain in CeCo2Ga8 | Session 21: Correlated F-Electron Materials |

290 | Spin Hall magnetoresistance studies of differently strained ultrathin SrMnO3 films | Das, Arijit; Watson, Adam J; Vallabhaneni, Eswara phanindra; Banerjee, Tamalika | We use Spin Hall magnetoresistance (SMR) as a probe of the magnetic ordering in thin films of SrMnO 3 (SMO) when grown on two different substrates –SrTiO 3 (STO) and LaAlO 3 (LAO) -that changes the induced strain from tensile to compressive respectively. | Session 22: Correlated Transition Metal Oxides |

291 | Orbital wave in the Raman scattering cross section of LaMnO3 | Munkhbaatar, Purevdorj; Kim, Myung-Whun | We calculated the polarization-dependent Raman scattering cross-section spectra of LaMnO3 below the A-type magnetic ordering temperature. | Session 22: Correlated Transition Metal Oxides |

292 | Investigation of the Jahn-Teller transition in La1-xSrxMnO3 by single-crystal neutron diffuse scattering | Li, Hongze; Liu, Yaohua; Zhou, Jianshi | With single-crystal neutron diffuse scattering (NDS), we have observed patterns that show an interesting evolution as it is cooled through three transitions. | Session 22: Correlated Transition Metal Oxides |

293 | Visualization of Site- and Bond-Centered Charge Order in a Half-Doped Manganite | El Baggari, Ismail; Baek, David; Zachman, Michael; Lu, Di; Hikita, Yasuyuki; Nowadnick, Elizabeth; Hwang, Harold; Kourkoutis, lena | Using cryogenic scanning transmission electron microscopy, we map the charge-ordered structure in a Nd1/2Sr1/2MnO3 thin film by measuring picoscale periodic lattice distortions. | Session 22: Correlated Transition Metal Oxides |

294 | Probing Orbital Order in Magnetite with Resonant Elastic X-Ray Scattering | Hua, Nelson; Li, Jianheng; Hrkac, Stjepan; Shabalin, Anatoly; Barbour, Andi; Hu, Wen; Mazzoli, Claudio; Wilkins, Stuart; Kukreja, Roopali; Fullerton, Eric; Shpyrko, Oleg | Standard X-ray diffraction studies are difficult to perform due to twinned domains, and the various studies investigating the bond lengths between Fe+2 and Fe+3 at the octahedral sites have shown at most a charge disproportionality. | Session 22: Correlated Transition Metal Oxides |

295 | Metal-insulator transition with ferromagnetic background in the two-orbital model for manganites | Sen, Cengiz; Dagotto, Elbio | In this talk, we present results of unbiased Monte Carlo simulations with fermionic exact diagonalization of the two-orbital model with Jahn-Teller phonons at filling x=1/3 on lattice sizes up to 15×15. | Session 22: Correlated Transition Metal Oxides |

296 | Gyrotropic birefringence via electromagnon resonance in multiferroic manganite | Ogino, Makiko; Kaneko, Yoshio; Tokura, Yoshinori; Takahashi, Youtarou | We focus on the electrically active spin excitation i.e. electromagnon, inherent to the multiferroics, which potentially exhibits the enhanced optical ME effect. | Session 22: Correlated Transition Metal Oxides |

297 | Torsional mode as order parameter in H-ErMnO3: mode screening, Fröhlich resonance, bipolarons | Massa, Néstor; Canizarès, Aurelien; del Campo, Leire; Holldack, Karsten; Ta Phuoc, Vinh; Kayser, Paula; Alonso, Jose | Since the longitudinal optical (LO) mode macroscopic field screening implies phonon dynamic coupling to charge fluctuations in an electron correlated insulating polar environment we used the above the gap λ exc= 355 nm Raman line to turn on the Fröhlich mechanism at macroscopic field frequencies at which the interaction between carriers and the Coulomb long range, responsible of the TO-LO split, takes place. | Session 22: Correlated Transition Metal Oxides |

298 | Doping evolution of the electronic structure in RENiO3 | Li, Jiarui; Green, Robert; Zhu, Zhihai; Zhang, Grace; Zhou, Da; Kang, Min Gu; Sadowski, Jerzy; Sutarto, Ronny; He, Feizhou; Zhang, Zhen; Sun, Yifei; Ramanathan, Shriram; Comin, Riccardo | In this talk, I will present our recent soft X-ray spectroscopy, resonant scattering, and photoemission microscopy experiments on both pristine and electron doped RENiO 3. | Session 22: Correlated Transition Metal Oxides |

299 | Local metallic properties of LaNiO3 detected using β-detected NMR | Karner, Victoria; Chatzichristos, Aris; Cortie, David; Dehn, Martin; Foyevtsov, Oleksandr; Foyevtsova, Kateryna; Fujimoto, Derek; Kiefl, Robert; Levy, Philip; Li, Ruohong; McFadden, Ryan; Morris, Gerald; Pearson, Matt; Stachura, Monika; Ticknor, John; Christiani, Georg; Logvenov, Gennady; Wrobel, Friederike; Keimer, Bernhard; Zhang, Junjie; Mitchell, John; MacFarlane, W | Here, we will compare measurements on a single crystal and a thin film of LaNiO 3 using β-detected NMR. | Session 22: Correlated Transition Metal Oxides |

300 | Electron- and Hole-Doping Effects on the Metal-Insulator Transition in “113” Nickelates [RNiO3, R = Pr, Nd, (La,Y)] Prepared at High Oxygen Pressure* | Ponti, Gregorio; Kuklinski, Zachary; Timmers, Quinn D. B.; Markert, John | We report x-ray diffraction, electrical resistivity, and other data on bulk polycrystalline materials prepared under high oxygen pressure (150–200 bar) at high temperature ( T ≈ 1000°C). | Session 22: Correlated Transition Metal Oxides |

301 | Large magnetic excitation gap in antiferromagnetic YNiO3 detected by NMR | Korosec, Lukas; Gawryluk, Dariusz; Medarde, Marisa; Shiroka, Toni; Ott, Hans; Mesot, Joel | We present 17O nuclear-spin–lattice relaxation measurements demonstrating the presence of a large gap of 30 meV in the magnetic excitation spectrum of YNiO 3. | Session 22: Correlated Transition Metal Oxides |

302 | Impact of low-temperature stripe freezing in La1.67Sr0.33NiO4 | Tranquada, John; Merritt, Adrian; Reznik, Dmitry; Garlea, Vasile; Gu, Genda | From new neutron diffraction measurements of a significant set of stripe-order peaks, we make the case that the charge stripes, which can be centered on either Ni or O sites, become predominantly Ni-centered at low temperature. | Session 22: Correlated Transition Metal Oxides |

303 | Many-body physics of single and double spin-flip excitations in NiO | Nag, Abhishek; Robarts, Hannah; Wenzel, F; Li, Jiemin; Elnaggar, H.; Wang, Ru-Pan; Walters, A; Garcia-Fernandez, Mirian; de Groot, F. M. F.; Haverkort, Maurits; Zhou, Kejin | Here, we study spin-flip excitations in NiO using Ni L3-edge RIXS and present a strikingly different resonant energy behaviour between single and double spin-flip excitations. | Session 22: Correlated Transition Metal Oxides |

304 | Structural and electronic properties of doped NiO | Wrobel, Friederike; Sohn, Changhee; Park, Hyowon; Shin, Hyeondeok; Lee, Ho Nyung; Sterbinsky, George; Hsiao, Haw-Wen; Zuo, Jian-Min; Ganesh, Panchapakesan; Krogel, Jaron; Benali, Anouar; Kent, Paul; Heinonen, Olle; Bhattacharya, Anand | We find that both K- and In-doped films at concentrations below 10% exhibit good X-ray diffraction spectra. | Session 22: Correlated Transition Metal Oxides |

305 | Domain wall spin-texture in quantum Hall magnets | Wei, Nemin; Huang, Chunli; MacDonald, Allan | Using a self-consistent Hartree-Fock calculation, we show that the spin-textures around the junction of \nu=0 and \nu=\pm 1 QHMs are wide, reaching ~140nm at B=8T. | Session 23: Correlations – Measurement and Control |

306 | Spin transport in quantum Hall magnets | Huang, Chunli; Wei, Nemin; MacDonald, Allan | I will discuss our efforts to understand several different aspects of these experiments: 1) using an electric circuit model, we provide an explanation for the finite range of bias voltages over which nonlocal voltages are observed across insulating magnetic states and 2) using a microscopic spin-wave theory we estimate the transmission probabilities of magnon-like collective modes across junctions between QHMs that have different Landau level filling factors. | Session 23: Correlations – Measurement and Control |

307 | Enhanced thermal Hall effect in nearly ferroelectric insulators | Chen, Jing-Yuan; Kivelson, Steven; Sun, Xiao-Qi | In the context of recent experimental observations of an unexpectedly large thermal Hall conductivity in insulating La 2-xSr xCuO 4 and SrTiO 3, we theoretically explore conditions under which acoustic phonons can give rise to such a large thermal Hall effect. | Session 23: Correlations – Measurement and Control |

308 | Probing quantum spin liquids in equilibrium using the inverse spin Hall effect | Aftergood, Joshua; Takei, So | We propose an experimental method utilizing a spin orbit coupled metal to quantum magnet bilayer that will probe quantum magnets lacking long range magnetic order, e.g., quantum spin liquids, via a dc resistance measurement across the metal. | Session 23: Correlations – Measurement and Control |

309 | Improved quantum transport calculations for interacting nanostructures | Minarelli, Emma; Mitchell, Andrew | In this talk I present theoretical reformulations of the Kubo and Meir-Wingreen formulae for mesoscopic quantum transport calculations in linear response, and demonstrate the improvement over standard methods with several example applications using the numerical renormalization group. | Session 23: Correlations – Measurement and Control |

310 | Resistive switching duality: insulator-to-metal vs. metal-to-insulator switching | Salev, Pavel; Berkoun, Rani; Sasaki, Dayne; del Valle, Javier; Kalcheim, Yoav; Takamura, Yayoi; Rozenberg, Marcelo; Schuller, Ivan | We present a detailed study of M-I switching in (La,Sr)MnO 3 (LSMO). | Session 23: Correlations – Measurement and Control |

311 | Quantum aspects of “hydrodynamic” transport from weak electron-impurity scattering | Hui, Aaron; Lederer, Samuel; Oganesyan, Vadim; Kim, Eun-Ah | By explicit calculation of the conductivity at finite wavevector σ(q) for selected weakly disordered free fermion systems, we propose experimental strategies for demonstrating distinctive quantum effects in non-local transport at odds with the expectations of classical kinetic theory. | Session 23: Correlations – Measurement and Control |

312 | Integrable systems of heterogeneous qubits | Sinitsyn, Nikolai; Chernyak, Vladimir; Sun, Chen | We explore an unusual type of quantum spin matter that can be realized by qubits having different physical origin, such as in bound states near defects in Dirac materials. | Session 23: Correlations – Measurement and Control |

313 | Looking into thermalization and localization through the lens of quantum coherence | Dhara, Sayandip; Hamma, Alioscia; Mucciolo, Eduardo | We present a protocol to calculate measurement-based localized coherence to investigate the thermal and many-body localized phases. | Session 23: Correlations – Measurement and Control |

314 | Measurement-induced criticality in random quantum circuits | Jian, Chao-Ming; You, Yizhuang; Vasseur, Romain; Ludwig, Andreas | In particular, we compute the exact value of the universal coefficient of the logarithm of subsystem size in the nth Rényi entropies for n≥1 in this limit using relatively recent results for conformal field theory describing the critical theory of 2D percolation, and we discuss how to access the generic transition at finite on-site Hilbert space dimension from this limit, which is in a universality class different from 2D percolation. | Session 23: Correlations – Measurement and Control |

315 | Temperature dependence of quantum information scrambling in gapped local systems | Sahu, Subhayan; Swingle, Brian | We study temperature dependence of quantum information scrambling, specifically, in systems with a gap. | Session 23: Correlations – Measurement and Control |

316 | Magnetic Hamiltonian Engineering by Light-Matter Interaction | Lin, Zexun; Rodriguerz-Vega, Martin; Fiete, Gregory | In this work, we explore the flexibility and magnitude of Hamiltonian engineering by considering photon-electron coupling and photon-phonon coupling. | Session 23: Correlations – Measurement and Control |

317 | Hydrogenated Rare-Earth Nickelate Nanojunctions with Synaptic Behavior Studied by X-ray Nanodiffraction | Zaluzhnyy, Ivan; Sprau, Peter; Wang, Qi; Zhang, Hai-Tian; Hua, Nelson; Stoychev, Boyan; Ramanathan, Shriram; Frano, Alex; Shpyrko, Oleg | With nanofocused x-ray diffraction and spectroscopy we performed in-situ spatially-resolved studies of the microscopic mechanism behind the potentiation and depression of an SNO-based device. | Session 23: Correlations – Measurement and Control |

318 | Unveiling electron correlation in semiconducting Heusler FeVSb by angle-resolved photoemission and dynamical mean field theory | Shourov, Estiaque Haidar; Strohbeen, Patrick; Manzo, Sebastian; Du, Dongxue; Rodolakis, Fanny; McChesney, Jessica; Krebs, Zach; Behn, Wyatt; de Lima, Felipe Castro; Sharan, Abhishek; Brar, Victor; Janotti, Anderson; Birol, Turan; Kawasaki, Jason | Here, combining angle-resolved photoemission spectroscopy (ARPES) and dynamical mean field theory (DMFT), we directly probe the single particle spectral function of the Heusler FeVSb. | Session 23: Correlations – Measurement and Control |

319 | Correlated electronic states and Fermi surface topology in flat-band graphene layers | Andrei, Eva | This talk will highlight two examples where the electronic ground state and Fermi surface topology depend sensitively on the filling of the flat bands: stacked graphene layers 1,2 with a relative twist angle close to a magic value of ~ 1 o, and buckled graphene layers in which a periodically modulated pseudo-magnetic field creates flat electronic bands. | Session 24: Correlations and Topology in Moiré Superlattices |

320 | Magnetism and topology in graphene-based flat minibands | Goldhaber-Gordon, David; Sharpe, Aaron; Chen, Guorui; Fox, Eli; Barnard, Arthur; Finney, Joe; Watanabe, Kenji; Taniguchi, Takashi; Kastner, Marc; Wang, Feng; Zhang, Yuanbo | We have now discovered dramatic magnetic states in such systems. | Session 24: Correlations and Topology in Moiré Superlattices |

321 | Orbital magnetism and topology in moiré heterostructure | Young, Andrea | I will discuss the origins of this effect in the spontaneous orbital polarization of the electron system into a single, topological nontrivial superlattice band, and show magnetic imaging data acquired using nanoSQUID on tip microscopy that confirms the orbital character of the magnetism and reveals mesoscopic domain dynamics. | Session 24: Correlations and Topology in Moiré Superlattices |

322 | Mapping the twist-angle disorder and unconventional Landau levels in magic angle graphene | Uri, Aviram; Grover, Sameer; Cao, Yuan; Crosse, John A.; Bagani, Kousik; Rodan-Legrain, Daniel; Myasoedov, Yuri; Watanabe, Kenji; Taniguchi, Takashi; Moon, Pilkyung; Jarillo-Herrero, Pablo; Zeldov, Eli | We find a correlation between the degree of twist angle disorder and the quality of the MAG transport characteristics. | Session 24: Correlations and Topology in Moiré Superlattices |

323 | Theory of flat bands, correlated insulators and superconductivity in graphene Moire heterostructures | Khalaf, Eslam | In regards to (i), we will present an exhaustive discussion of possible mean field symmetry broken states in TBG [1]. | Session 24: Correlations and Topology in Moiré Superlattices |

324 | Chemical control of magnetism in S = 1 quantum materials: new twists on a seemingly old theme | Manson, Jamie; Villa, Jacqueline; Villa, Danielle; Calderon-Lin, Isabel; Manson, Zachary; Grinalds, Nathan; Sargent, Ashley; Blackmore, William; Curley, Sam; Goddard, Paul; Singleton, John; Stone, Matthew; Johnson, Roger; Garlea, Vasile; Manuel, Pascal; Brown, Craig | We aim to control the spatial exchange and single-ion anisotropies ( D) in bespoke S = 1 Ni(II) quantum magnets. | Session 25: Criticality and Low Dimensionality in Quantum Magnets |

325 | A near-ideal molecule-based Haldane spin chain | Goddard, Paul; Williams, Robert; Blackmore, William; Curley, Sam; Lees, Martin; Birnbaum, Serena; Singleton, John; Huddart, Benjamin; Hicken, Thomas; Lancaster, Tom; Blundell, Stephen; Xiao, Fan; Ozarowski, Andrew; Pratt, Francis; Voneshen, David; Guguchia, Zurab; Baines, Christopher; Schlueter, J.A.; Villa, Danielle; Manson, Jamie | We report on a new molecule-based magnet NiI2(3,5-lutidine)4 characterized using x-ray diffraction, electron-spin resonance, magnetometry, inelastic neutron scattering and muon-spin relaxation. | Session 25: Criticality and Low Dimensionality in Quantum Magnets |

326 | Magnetic ground-state of two new highly one-dimensional ferromagnetic chain compounds M(NCS)2(thiourea)2; M = Co, Ni. | Curley, Sam; Williams, Robert; Goddard, Paul; Scatena, Rebecca; Blundell, Stephen; Macchi, Piero; Hicken, Thomas; Lancaster, Tom; Xiao, Fan; Eckert, James; Zapf, Vivien; Villa, Jacqueline; Manson, Jamie | We employ a combination of magnetometry, heat capacity and muon spin-rotation in addition to theoretical charge density analysis, in an attempt to resolve the magnetic ground-state of both materials. | Session 25: Criticality and Low Dimensionality in Quantum Magnets |

327 | Cluster-Based Haldane States in Spin Cluster Chains | Sugimoto, Takanori; Morita, Katsuhiro; Tohyama, Takami | Thus, we will present several varieties of cluster-based Haldane states obatined in possible spin lattices. | Session 25: Criticality and Low Dimensionality in Quantum Magnets |

328 | A Novel Strongly Spin-Orbit Coupled Quantum Dimer Magnet: Yb2Si2O7 | Hester, Gavin; Nair, Harikrishnan; Reeder, Timothy; Yahne, Danielle; DeLazzer, Timothy; Berges, Léo; Ziat, Djamel; Neilson, James; Aczel, Adam; Sala, Gabriele; Quilliam, Jeffrey; Ross, Kate | I will discuss a new QDM in the strongly spin-orbit coupled, distorted honeycomb-lattice material Yb 2Si 2O 7. | Session 25: Criticality and Low Dimensionality in Quantum Magnets |

329 | Dimensionality of the BEC state in structurally healed Sr-doped BaCuSi2O6 | Weickert, Dagmar; Jaime, Marcelo; Puphal, Pascal; Imajo, Shusaku; Kohama, Yoshimitsu; Link, Joosep; Stern, Raivo | We establish the H-T phase diagram based on magnetization, magnetic torque, specific heat and magnetocaloric effect (MCE) measurements in DC and pulsed magnetic fields that address the dimensionality of excitations in the BEC critical exponents. | Session 25: Criticality and Low Dimensionality in Quantum Magnets |

330 | Unconventional critical behavior in the quasi-one-dimensional S = 1 chain NiTe2O5 | Lee, Jun Han; Kratochvílová, Marie; Cao, Huibo; Yamani, Zahra-Sadat; Kim, Jungsoo; Park, Je-Guen; Stewart, Gregory; Oh, Yoon Seok | In this talk, we present magnetic properties and structure of NiTe 2O 5 and discuss its unconventional critical behavior. | Session 25: Criticality and Low Dimensionality in Quantum Magnets |

331 | Magnetic phase diagram and anisotropy in the one-dimensional quantum spin system Rb2Cu2Mo3O12 | Hayashida, Shohei; Blosser, Dominic; Povarov, Kirill; Yan, Zewu; Gvasaliya, Severian; Ponomaryov, Alexey; Zvyagin, Sergei; Zheludev, Andrey | We report low temperature thermodynamic, magnetic and electron spin resonance (ESR) measurements on single crystal samples of a quantum spin chain material Rb 2Cu 2Mo 3O 12. | Session 25: Criticality and Low Dimensionality in Quantum Magnets |

332 | Comparison of spin dynamics in green and black dioptase: from classical chains to quantum fluctuations | Podlesnyak, Andrey; Nikitin, Stanislav; Prokhnenko, Oleksandr; Kolesnikov, Alexander; Prisk, Timothy; Anovitz, Lawrence {Larry} | We found that dehydration has a dual effect on the magnetic interactions: it significantly increases the intrachain exchange interaction Jc, and simultaneously decouples the chains by suppressing Jab. | Session 25: Criticality and Low Dimensionality in Quantum Magnets |

333 | Using muons to probe magnetic phases in quantum disordered systems through muon-induced distortions | Huddart, Benjamin; Lancaster, Tom; Pratt, Francis | In this talk, we will present examples where the distortions induced by the muon provide sensitivity to the magnetic state of the system. | Session 25: Criticality and Low Dimensionality in Quantum Magnets |

334 | Kaleidoscope of Quantum Phases in a Frustrated Spin-1 Chain with Single-ion Anisotropy | Luo, Qiang; Hu, Shijie; Zhao, Jize; Wang, Xiaoqun | We study the phases and phase transitions of a spin-1 chain with next-nearest neighbor (NNN) interaction J 2 and uniaxial single-ion anisotropy D by density-matrix renormalization group method. | Session 25: Criticality and Low Dimensionality in Quantum Magnets |

335 | Fermi surface transformation across the pseudogap critical point in the cuprate Nd-LSCO from thermoelectric measurements | Gourgout, Adrien; Collignon, Clement; Ataei, Amirreza; Badoux, Sven; Grissonnanche, Gael; Boulanger, Marie-Eve; Laliberte, Francis; Zhou, Jianshi; Ma, Qianli; Gaulin, Bruce; Doiron-Leyraud, Nicolas; Taillefer, Louis | Here we present a series of thermoelectric measurements in Nd-LSCO across p*, in magnetic fields large enough to suppress superconductivity. | Session 26: Cuprate and Iron Superconductor Normal State Properties |

336 | Spiral magnetic order in high-Tc cuprates – a ground state candidate at high magnetic fields | Mitscherling, Johannes; Bonetti, Pietro; Vilardi, Demetrio; Metzner, Walter | We present quantitative results for magnetic order in the Hubbard model at strong coupling using dynamical mean-field theory [4]. | Session 26: Cuprate and Iron Superconductor Normal State Properties |

337 | Thermodynamic evidence of quantum criticality at the pseudogap critical point of cuprate superconductors | Girod, Clément; Michon, Bastien; Lizaire, Maude; Gourgout, Adrien; Badoux, Sven; Doiron-Leyraud, Nicolas; Laliberte, Francis; Kačmarčík, Jozeph; Verret, Simon; Zhou, Jianshi; Ma, Qianli; Dragomir, Mirela; Dabkowska, Hannah A.; Gaulin, Bruce; Pyon, Sunseng; Takayama, Tomohiro; Takagi, Hidenori; Zheng, Guo-Qing; ono, shimpei; Marcenat, Christophe; Taillefer, Louis; Klein, Thierry | Here we provide thermodynamic evidence of a QCP in hole-doped cuprates from low-temperature measurements of the specific heat in magnetic fields up to 35 T, high enough to suppress superconductivity. | Session 26: Cuprate and Iron Superconductor Normal State Properties |

338 | Large negative thermal Hall conductivity in cuprate Mott insulators | Boulanger, Marie-Eve; Grissonnanche, Gael; Dion, Maxime; Lefrancois, Etienne; Liang, Ruixing; Hardy, Walter; Bonn, Douglas; Zhou, Jianshi; Taillefer, Louis | We observe a large negative k xy signal in both materials. | Session 26: Cuprate and Iron Superconductor Normal State Properties |

339 | Deep in the electron-doped cuprate pseudogap regime: a two-particle self-consistent approach with GG0 approximation to the two-dimensional Hubbard model | Wang, Yan; Vilk, Yuri; Tremblay, Andre-Marie | In electron-doped cuprates, the nonperturbative semianalytical two-particle-self-consistent (TPSC) approach naturally explains the PG as the finite- T precursor of the antiferromagnetic (AFM) bands of the ordered ground state at T=0. | Session 26: Cuprate and Iron Superconductor Normal State Properties |

340 | Disorder effects on the phase diagram of electron-doped cuprates using the two-particle self-consistent approach | Gauvin-Ndiaye, Chloe-Aminata; Tremblay, Andre-Marie | [3,4] In this work, we include the effect of impurities and disorder in TPSC using the impurity averaging technique. | Session 26: Cuprate and Iron Superconductor Normal State Properties |

341 | Measured vs. Calculated Phonon Dispersions in the Cuprate HgBa2CuO4 | Ahmadova, Irada; Sterling, Tyler; Sokolik, Aaron; Merritt, Adrian; Abernathy, Douglas; Chan, Mun; Tang, Yang; Yu, Guichuan; Greven, Martin; Reznik, Dmitry | Taking the prototypical high-T c superconductor HgBa 2CuO 4 as an example, I will compare ab-initio density-functional-theory (DFT) calculations of the phonon dispersions to inelastic neutron scattering results that exhibit an anomaly in the Cu-O bond stretching branch. | Session 26: Cuprate and Iron Superconductor Normal State Properties |

342 | Nature of the pseudogap in cuprate superconductors | Vielza de la Cruz, Yoandris | In the present work, the Hamiltonian is diagonalized on a Hartree-Fock base of collinear spins states that leaves fixed the magnetic order on the square sublattices. | Session 26: Cuprate and Iron Superconductor Normal State Properties |

343 | Criticality vs material inhomogeneity: an analysis of LSCO magnetoresistance data | Boyd, Christian; Phillips, Philip | We analyze existing data on this thin-film sample to demonstrate that, contrary to the high-Tc iron superconductors near optimal doping, no single scaling function of temperature and field can describe the magnetoresistance data across all measured temperatures above and below the superconducting Tc. | Session 26: Cuprate and Iron Superconductor Normal State Properties |

344 | What can Density Functional Theory tell us about Pseudogaps? | Markiewicz, Robert; Zhang, Yubo; Lane, Christopher; Furness, James; Matzelle, Matt; Barbiellini, Bernardo; Perdew, John; Sun, Jianwei; Bansil, Arun | We have shown recently that advanced exchange-correlation functionals can enable first-principles treatment of the electronic, geometric and magnetic structure of the cuprates and other correlated materials without the need to invoke ad hoc parameters such as the Hubbard U. [1,2] Here, we focus on how in this picture the pseudogap phase in YBaCu3O 7 involves a large number of competing magnetic and stripe phases with small energy differences, which can be looked upon as simple antiferromagnets with topological defects, i.e. defects consisting of stacking faults and charged antiphase boundaries or the charged stripes[3,4]. | Session 26: Cuprate and Iron Superconductor Normal State Properties |

345 | Determine the spatial locality of self-energy of LiFeAs | Kim, Minjae; Miao, Hu; Kotliar, Gabriel | In this presentation, we extract spatially resolved and orbital dependent electronic self-energy of LiFeAs from angle resolved photoemission spectroscopy with density functional theory as a reference frame, and discuss the level of locality in the different orbitals, with the xy orbital being more local than the xz yz. | Session 26: Cuprate and Iron Superconductor Normal State Properties |

346 | Quasiclassical theory of C4-symmetric magnetic order in disordered iron-based superconductors | Dzero, Maxim | In my talk, I will formulate a quasi-classical theory of such a state. | Session 26: Cuprate and Iron Superconductor Normal State Properties |

347 | Nematicity in the pseudogap and charge order phases of the cuprate YBCO | Taillefer, Louis; Grissonnanche, Gael; Cyr-Choiniere, Olivier; Doiron-Leyraud, Nicolas; Liang, Ruixing; Hardy, Walter; Bonn, Douglas | We find no trace of any additional anisotropy in either ρ( T) or S( T) upon crossing below the pseudogap temperature T*. | Session 26: Cuprate and Iron Superconductor Normal State Properties |

348 | Diverse unconventional density wave states in high-Tc cuprates and other unconventional superconductors | Kontani, Hiroshi; Kawaguchi, Kouki; Tazai, Rina; Yamakawa, Youichi; Onari, Seiichiro | We discuss the mechanism of diverse nematic orders in various strongly correlated electron systems, by considering the interference among different fluctuations given by vertex corrections (VCs). | Session 26: Cuprate and Iron Superconductor Normal State Properties |

349 | Investigation of the Orbital Moment on the Fe Impurities in Iron-Based Superconductor | PENG, SHIYU; LIU, JIANPENG; Weng, Hongming; Dai, Xi | In the present study, by applying LDA+Gutzwiller method we have systematically studied the value of the orbital magnetic moment as the function of the height between the Fe impurity and the surface of superconducting Fe(Te,Se). | Session 26: Cuprate and Iron Superconductor Normal State Properties |

350 | Oliver E. Buckley Condensed Matter Physics Prize talk | Jarillo-Herrero, Pablo | In this talk I will review the discovery of correlated insulator states and superconductivity in magic-angle twisted bilayer graphene, as well as some of the recent developments in the field. | Session 27: DCMP Prize Session |

351 | What have we learned from Dynamical Mean Field Theory and what lies ahead ? | Georges, Antoine | In this talk, I will review the main ideas at the heart of the DMFT construction and physical perspective. | Session 27: DCMP Prize Session |

352 | Towards a Theory of Strongly Correlated Materials the Dynamical Mean Field Theory Road | Kotliar, Gabriel | Dynamical Mean Field Theory (DMFT) has enabled a community of scientists to achieve great progress in this area. | Session 27: DCMP Prize Session |

353 | Frank Isakson Prize for Optical Effects in Solids: Composite Materials and Metamaterials for Nonlinear Optics | Boyd, Robert | Recent work has shown an additional means of enhancing the nonlinear optical response by making use of a material that possesses a vanishingly small electric permittivity at the wavelength of interest. | Session 27: DCMP Prize Session |

354 | Plasmonic Metamaterials Meet Quantum | Shalaev, Vladimir; Bogdanov, Simeon; Boltasseva, Alexandra | Plasmonic Metamaterials Meet Quantum | Session 27: DCMP Prize Session |

355 | The Predictive Power of Exact Constraints and Appropriate Norms in Density Functional Theory | Perdew, John | The Predictive Power of Exact Constraints and Appropriate Norms in Density Functional Theory | Session 28: DFT and Beyond |

356 | Assessment of DFAs in predicting the magnetization of transition metal solids | Vela, Alberto; Botello Mancilla, Karla; Albavera Mata, Angel; Trickey, Samuel; Gazquez, Jose | [1-4] Here we present and discuss the performance of a variety of generalized and meta-generalized gradient approximations, including our recently proposed locally parameterized GGAs, on the magnetic properties of a set composed of 3d, 4dand 5dmetals, a total of 29 solids. | Session 28: DFT and Beyond |

357 | The Importance of Smoothness with Exact Constraints in Functional Design | Furness, James; Kaplan, Aaron; Perdew, John; Sun, Jianwei | We explore how constraint restoration affects accuracy and efficiency in simple systems for which exact constraints are important. | Session 28: DFT and Beyond |

358 | Analysis of over-magnetization of elemental transition metal solids from the SCAN and three related density functionals. | Mejia-Rodriguez, Daniel; Trickey, Sam | We discuss what properties of the SCAN, revSCAN and rSCAN functional forms are responsible for such errors, and why the SCAN-L functional does much better in this respect [2]. | Session 28: DFT and Beyond |

359 | Failure of the SCAN functional for itinerant magnets and the reasons | Singh, David; Fu, Yuhao | We report that SCAN is closer in behavior to functionals that yield localized behavior, such as hybrid functionals, than other semilocal functionals that are tested. | Session 28: DFT and Beyond |

360 | Assessment of SCAN and regularized SCAN functional with and without self-interaction correction | Salcedo, Alan; Yamamoto, Yoh; Baruah, Tunna; Zope, Rajendra | We have implemented rSCAN functional in our Fermi-Lowdin Self-Interaction Correction code and performed assessment of rSCAN for various molecular properties using standard datasets. | Session 28: DFT and Beyond |

361 | Systematizing Approximate Density Functional Design | Kaplan, Aaron; Furness, James; Sun, Jianwei; Perdew, John | In this talk, I’ll discuss the need to further systematize the construction of approximate density functionals. | Session 28: DFT and Beyond |

362 | Evaluating exchange correlation performance on structural prediction from GGA to metaGGA | Tavadze, Pedram; Verstraete, Matthieu; Romero, Aldo | In this work we analyze the effect on the internal degrees of freedom of more than 1500 structures, both metallic and semiconductor materials from completely local functionals as LDA up to meta-GGAs using the recently introduced SCAN. | Session 28: DFT and Beyond |

363 | Single Hamiltonian for self-interaction corrected DFT with Fermi-Lowdin orbitals | Baruah, Tunna; Pederson, Mark | We show that within the Fermi-Lowdin orbital based self-interaction correction scheme it is also possible to derive a single Kohn-Sham multiplicative Hamiltonian for all orbitals which decreases the computational complexity. | Session 28: DFT and Beyond |

364 | Self-interaction correction and dielectric properties of molecules | Withanage, Kushantha; Johnson, Alexander; Peralta, Juan; Yamamoto, Yoh; Zope, Rajendra; Baruah, Tunna; Jackson, Koblar | In this talk, we examine this overcorrection and discuss simple approaches to overcome it. | Session 28: DFT and Beyond |

365 | Fermi-Löwdin self-interaction correction for ground and excited states | Adhikari, Santosh; Zope, Rajendra; Diaz, Carlos; Ruzsinszky, Adrienn | Fermi-Löwdin self-interaction correction for ground and excited states | Session 28: DFT and Beyond |

366 | Assisting the performance of self-interaction-corrected SCAN meta-GGA functional using an orbital scaling approach | Yamamoto, Yoh; Zope, Rajendra; Baruah, Tunna | We implemented the orbital scaling approach of Vydrov et al.[1] that scales down orbital wise PZSIC in the FLOSIC code and use it with SCAN functional to assess its performance for a wide range of properties such as total energies, ionization potentials, and electron affinities for atoms, and atomization energies, dissociation and reaction energies, and reaction barrier heights of molecules. | Session 28: DFT and Beyond |

367 | On the Constrained Search-Coordinate Scaling Formulations in DFT | Levy, Mel | On the Constrained Search-Coordinate Scaling Formulations in DFT | Session 28: DFT and Beyond |

368 | Essential difference between the machine learning and artificial Kohn-Sham potentials | Nagai, Ryo; Burke, Kieron; Akashi, Ryosuke; Sugino, Osamu | The Kohn-Sham density functional theory is widely used to predict physical or chemical properties of various materials with its practical accuracy and computational cost. | Session 28: DFT and Beyond |

369 | Machine learning accurate exchange and correlation functionals of the electronic density | Dick, Sebastian; Fernandez Serra, Marivi | Here we propose a framework to create highly accurate density functionals by using supervised machine learning, termed NeuralXC. | Session 28: DFT and Beyond |

370 | Constrained Machine Learning de-orbitalization of meta-GGA exchange-correlation functionals | Pokharel, Kanun; Furness, James; Sun, Jianwei | We exploit this relationship using machine learning combined with exact constraints to explore how neural-network models can de-orbitalize functionals and model fundamental components of Kohn-Sham density functional theory. | Session 28: DFT and Beyond |

371 | Semiclassical Approximation to Sums of Eigenvalues with Application to DFT | Okun, Pavel; Burke, Kieron | I present a new mathematical framework developed by Kieron Burke and Michael V. Berry for estimating the sum of the lowest N eigenenergies of a one-dimensional potential. | Session 28: DFT and Beyond |

372 | Progress in the Development of Advanced Temperature-Dependent Free-Energy Density Functionals Beyond the Generalized Gradient Approximation | Mihaylov, Deyan; McLellan, Brenda; Karasiev, Valentin; Hu, Suxing | Here, we present recent progress in going beyond the GGA by developing finite-T extensions to the PBE0 and SCAN-L (the de-orbitalized version of SCAN) XC functionals. | Session 28: DFT and Beyond |

373 | Symmetry-Breaking Polymorphous Descriptions for Correlated Materials without Interelectronic U | Zhang, Yubo; Furness, James; Zhang, Ruiqi; Wang, Zhi; Zunger, Alex; Sun, Jianwei | We rationalize how density functional theory (DFT) in the polymorphous representation achieves band gap opening in correlated materials through a separate mechanism to the Mott-Hubbard approach. | Session 28: DFT and Beyond |

374 | A step in the direction of resolving the paradox of Perdew-Zunger self-interaction correction | Zope, Rajendra; Yamamoto, Yoh; Diaz, Carlos; Baruah, Tunna; Peralta, Juan; Jackson, Koblar; Santra, Biswajit; Perdew, John | Here we propose a modification to PZSIC that uses an iso-orbital indicator to identify regions where local SI corrections should be applied. | Session 28: DFT and Beyond |

375 | Kohn-Sham effective potentials from FLOSIC using Ryabinkin-Kohut-Staroverov method | Diaz, Carlos; Basurto, Luis; Zope, Rajendra | We adapt and implement the Ryabinkin-Kohut-Staroverov method to obtain effective local potentials from the self-interaction corrected Fermi-Lowdin orbitals and density in the FLOSIC code. | Session 28: DFT and Beyond |

376 | Performance of scaled self-interaction correction to semilocal functionals | Bhattarai, Puskar; Shahi, Chandra; Wagle, Kamal; Santra, Biswajit; Perdew, John | Here, we apply a scaled PZ SIC to LSDA, PBE, and SCAN and calculated different properties such as electron affinity, ionization potential, barrier height, atomization energy, and bond length of some representative test sets. | Session 28: DFT and Beyond |

377 | The Connector Theory Approach: Principles and Development of New Density Functionals | Reining, Lucia; Aouina, Ayoub; Vanzini, Marco; Panholzer, Martin; Wetherell, Jack; Gatti, Matteo | In this talk we will show how model results can be used in an in principle exact way, called “Connector Theory”, in order to describe observables and systems of interest. | Session 28: DFT and Beyond |

378 | Nonadiabatic electron dynamics in time-dependent density-functional theory at the cost of adiabatic local density approximation. | Gulevich, Dmitry; Zhumagulov, Yaroslav; Vagov, Alexei; Tokatly, Ilya; Perebeinos, Vasili | We propose a computationally efficient approach to nonadiabatic electron dynamics in time-dependent density functional theory (TDDFT) based on a representation of the frequency-dependent exchange correlation kernel as a response of a set of damped oscillators. | Session 28: DFT and Beyond |

379 | Imitating beyond-DFT calculations via external on-site potentials | Kumar, Nitin; Lany, Stephan | In this direction, we aim to reproduce the beyond-DFT level by using angular-momentum and energy-dependent external on-site potentials. | Session 28: DFT and Beyond |

380 | First Principles Derivation of the Effect of Geometric Noise on Distributions of Electronic Properties using the Effective Stochastic Kohn-Sham Potential Method | Scher, Jeremy; Chakraborty, Arindam | In this work, we present a new approach called the effective stochastic Kohn-Sham potential (ESKS) method to address this challenge. | Session 28: DFT and Beyond |

381 | Towards Spectroscopic Accuracy for In-Silico Materials Design | Sedova, Ada; Pandey, Anup; Ramirez-Cuesta, Anibal | We present a new approach for enabling highly accurate prediction of non-equilibrium behavior of large supramolecular organic systems for in-silico design of novel functional materials. | Session 28: DFT and Beyond |

382 | Understanding the interplay between hole localization and reactivity in photoionized water clusters using real-time Time-Dependent Density Functional Theory | Sharma, Vidushi; Fernandez Serra, Marivi | In this work, we examine the scope of rt-TDDFT-based methods for analyzing ultrafast processes in photoexcited systems. | Session 28: DFT and Beyond |

383 | Approaches for Non-Adiabatic Functional Approximations in TDDFT | Lacombe, Lionel; Maitra, Neepa | We discuss different approaches to develop functionals that build in memory into new non-adiabatic exchange-correlation functionals. | Session 28: DFT and Beyond |

384 | Plasmon dispersion and the role of the exact constraints on exchange-correlation kernels within time-dependent density functional theory | Ruzsinszky, Adrienn; Neupane, Bimal; Ruan, Shiqi; Adhikari, Santosh; Neupane, Santosh; Nepal, Niraj | Our current work for the jellium model introduces recent model exchange-only and exchange-correlation kernels and discusses the relevance of some exact constraints [2,3] in the construction of the kernel. | Session 28: DFT and Beyond |

385 | Nonlocal energy optimized (NEO) kernel for the formation energies of alloys and surface energies of metals | Neupane, Bimal; Nepal, Niraj; Adhikari, Santosh; Ruzsinszky, Adrienn | In this work, we are using the nonlocal energy-optimized (NEO) exchange-only kernel [1,2] to assess the formation energies of some intermetallic alloys and surface energies of some metals. | Session 28: DFT and Beyond |

386 | Predicting the accurate structural and energetic properties of copper-gold alloys using random phase approximation | Nepal, Niraj; Adhikari, Santosh; Bates, Jefferson; Ruzsinszky, Adrienn | The inclusion of thermal correction or the long-range dispersion provides a negligible contribution to the formation energies estimated with semilocal density functional theory. | Session 28: DFT and Beyond |

387 | Non-Adiabatic Quantum Molecular Dynamics Investigation of Hot Carrier Dynamics in Dielectric Polymers under High Electric Fields. | Linker, Thomas; Tiwari, Subodh; Kumazoe, Hiroyuki; Fukushima, Shogo; Kalia, Rajiv; Nakano, Aiichiro; Ramprasad, Ramamurthy; Shimojo, Fuyuki; Vashishta, Priya | In this work we have ported NAQMD to study excited hot charge carriers involved in dielectric break down of organic polymers under high electric fields. | Session 28: DFT and Beyond |

388 | Nonadiabatic Electron Nuclear Dynamics in TDDFT with Variational Quantum Nuclei | Lively, Kevin; Albareda, Guillermo; Kelly, Aaron; Sato, Shunsuke; Rubio, Angel | In this talk we develop a trajectory based variational ansatz which treats the electronic system at the level of time-dependent density functional theory, while simultaneously incorporating a nonadiabatic quantum mechanical description of the nuclei. | Session 28: DFT and Beyond |

389 | Long-Range Correlations in Density Functional Theory | Gould, Tim | This talk will discuss the origins of key types of long-range correlations in density functional theory, and consider physical, chemical and mathematical perspectives on the problem. | Session 28: DFT and Beyond |

390 | Embedding tools to improve density functionals. | Wasserman, Adam | We use density embedding theory to examine the behavior of the non-additive contribution to the XC energy and to propose physically-motivated approximations for this contribution as atoms dissociate. | Session 28: DFT and Beyond |

391 | Kohn-Sham accuracy at a fraction of the cost: Nonlocal subsystem DFT and orbital-free DFT | Pavanello, Michele | In this presentation, we employ latest-generation nonlocal KEDF 1,2 in subsystem DFT 3 and orbital-free DFT 4 simulations. | Session 28: DFT and Beyond |

392 | Absolutely Localized Multi-reference DFT Embedding | Graham, Daniel; Wen, Xuelan; Chulhai, Dhabih; Goodpaster, Jason | Quantum embedding methods provide a strategy for performing localized highly accurate calculations on chemical systems while not incurring high cost computational scaling. | Session 28: DFT and Beyond |

393 | 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 28: DFT and Beyond |

394 | Analytic inversion procedure for the exact non-additive kinetic potential functional Vnad | Banafsheh, Mojdeh; Kronik, Leeor; Gould, Tim; Strubbe, David; Wesolowski, Tomasz | We report here an inversion procedure to generate reference V nad for weakly overlapping ρ A and ρ B. To obtain the exact V nad we used an analytical inversion procedure that we proposed (M. Banafsheh, T.A. Wesolowski, Int. | Session 28: DFT and Beyond |

395 | Bond energies of molecules using optimal transport theory for the strictly-correlated-electron (SCE) limit of Density-Functional-Theory | Deshmukh, Kshiteej; Dayal, Kaushik | We incorporate the Kantorovich solution within the KS-DFT framework and solve it using the finite element method. | Session 28: DFT and Beyond |

396 | How accurate can a metaGGA+vdW functional be simultaneously for chemisorption and physisorption of molecular adsorption on transition metal surfaces? | Kothakonda, Manish; Zhang, Ruiqi; Ning, Jinliang; Furness, James; Sun, Jianwei | In this work, we combine the semi-local meta-GGA made simple (MGGA_MS) functional with the rvv10 vdW correction [1-3]. | Session 28: DFT and Beyond |

397 | 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[ n]( r), and the asymptotic behavior of the Kohn-Sham potential, v xc[ n]( r), in finite many-electron systems. | Session 28: DFT and Beyond |

398 | Methods of corrections to to GEA approximations of the Pauli potential | Redd, Jeremy; Cancio, Antonio | We propose a smooth non-analytic stitching function to correct the error in the near nuclear region for Pauli potential GEAs, and explore the outer core. | Session 28: DFT and Beyond |

399 | Practical Density Functional Theory Beyond the Zero-Sum Limit: M11plus | Verma, Pragya; Janesko, Benjamin; Wang, Ying; He, Xiao; Scalmani, Giovanni; Frisch, Michael; Truhlar, Donald | This model effectively uses like-spin exchange to model opposite-spin correlation, producing a "zero-sum" tradeoff in performance for some classes of problems, including bond energies vs. barrier heights or valence vs. Rydberg excitations. | Session 28: DFT and Beyond |

400 | Numerical analysis of thermodynamic limit extrapolation power-laws in the uniform electron gas using connectivity-twist-averaged coupled cluster doubles theory | Mihm, Tina; Yang, Bingdi; Weiler, Laura; McIsaac, Alexandra; Grueneis, Andreas; Ramadugu, Sai; Shepherd, James | We recently developed a coupled-cluster theory method in the uniform electron gas (UEG) for improving twist averaging in solids [1]. | Session 28: DFT and Beyond |

401 | Structural effects on excitonic interactions in functional materials from first principles | Refaely-Abramson, Sivan | In this talk, I will describe a computational assessment of the relation between excitonic phenomena and material structure and design, using many-body perturbation theory within the GW and Bethe-Salpeter equation (GW-BSE) approach. | Session 28: DFT and Beyond |

402 | The Accuracy of a Tuned Screened Range-Separated Hybrid DFT for Describing Electronic and Optical Properties of Defective Semiconductors | Lewis, Kirk; Ramasubramaniam, Ashwin; Sharifzadeh, Sahar | In particular, tuned and screened range-separated hybrid (SRSH) hybrid methods have been shown to provide MBPT accuracy at the cost of hybrid DFT for many materials. | Session 28: DFT and Beyond |

403 | UNDERSTANDING EXCITONS IN STACKED PERYLENE DIIMIDE DERIVATIVES | Mukazhanova, Aliya; Trerayapiwat, Kasidet Jing; Sharifzadeh, Sahar | Here, we investigate the optical properties of recently synthesized stacked perylene diimide derivatives via time-dependent density functional theory with a Franck-Condon Herzberg-Teller approximation of vibronic effects, validating our approach by comparison to measurement. | Session 28: DFT and Beyond |

404 | First-principles investigations of structure and vibrations of c(4×2) PF3 on Cu(001) | Karimitari, Nima; Lewis, Steven | We will present detailed calculational evidence, including phonon density of states and projected density of states to support the rich structural and vibrational behavior that this system affords. | Session 28: DFT and Beyond |

405 | First-principles simulations of photocatalytic systems for hydrogen production | Lemay, Samuel; Antonius, Gabriel | In the present work, we focus on Co(bpy)2 and Co(bpym)2 where (bpy) is a bipyridine ligand and (bpym) is a bipyridine mimic. | Session 28: DFT and Beyond |

406 | The Dirac equation and its implications for density functional theory-based calculations of materials containing heavy elements | Rehn, Daniel; Wills, John; Mattsson, Ann | Working towards that goal, we have developed a code, called dirac-fp, that solves the Dirac-Kohn-Sham equations under the assumption of a vanishing orbital current. | Session 28: DFT and Beyond |

407 | Effect of functional -NH2 groups on sensitization of 3,6-diaminocarbazole towards Picric Acid | Kumar, Vishal; Satapathi, Soumitra | In this paper we demonstrate an opto-chemical sensor for explosive detection by using a carbazole derivative, namely 3,6-diaminocarbazole (DAC) (Φ f=49%), was synthesized through controlled nitration of the carbazole (Φ f=42%) with fuming nitric acid. | Session 28: DFT and Beyond |

408 | Charge Transport Properties of Biomolecules | Aggarwal, Abhishek; BAG, SAIENTAN; Venkatramani, Ravindra; Jain, Manish; Maiti, Prabal | Using the dsRNA morphology from MD simulations, we use a multiscale method involving ab initio DFT calculations and Kinetic Monte Carlo (KMC) simulations to estimate the conductance of dsRNA and find that the conformational changes drastically affect its conductance. | Session 28: DFT and Beyond |

409 | Cyanide Bridged Platinum-Iron Complexes as Cisplatin Prodrug Systems: Design and Computational Study | Kaspi-Kaneti, Ariela; Bhandari, Srijana; Dunietz, Barry | We present design principles of cyanide bridged Platinum-Iron complexes as novel Platinum(IV) anti-cancer prodrugs that bear the potential of high selectivity towards cancerous cells. | Session 28: DFT and Beyond |

410 | Detection of DNA nucleotides with Nanopores and Nanogaps from 2D Materials beyond Graphene: First Principle Studies | Tayo, Benjamin | We present the results of computational studies on nano-bioelectronic devices combining the superb properties of 2D materials beyond graphene with DNA nucleotides. | Session 28: DFT and Beyond |

411 | Electronic and optical properties of halide perovskite quantum dots: a DFT and TDDFT study. | Koliogiorgos, Athanasios; Garoufalis, Christos; Galanakis, Iosif; Baskoutas, Sotirios | In this study, we present a wide spectrum of different hybrid halide perovskite cuboid-like QDs with the general formula of ABX 3 (A = Cs, CH 3NH 3; B = Pb, Sn, Ge, Ca, Sr and X = Cl, Br, I) with varying sizes below and near the Bohr exciton radius. | Session 28: DFT and Beyond |

412 | Efficient and Accurate Fully Relativistic Density Functional Treatment for Molecules and Periodic Solids | Zhao, Rundong; Yu, Victor; Zhang, Kimberly; Xiao, Yunlong; Zhang, Yong; Liu, Wenjian; Blum, Volker | A fully relativistic density functional method (called quasi-four-component algorithm, Q4C) in combination with numeric atom-centered orbital (NAO) basis functions is presented. | Session 28: DFT and Beyond |

413 | An Electronic Structure Approach to Understand Charge Transfer & Transport in Organic Semiconducting Materials | Bhandari, Srijana | Here, we develop the approach to address non-equilibrium conditions by using RSH functionals within NEGF formulation to study conductance. | Session 28: DFT and Beyond |

414 | Steady-State Density Functional Theory for quantum transport and spectral functions | Stefanucci, Gianluca; Kurth, Stefan; Jacob, David; Sobrino, Nahual | After revisiting the fundamentals of i-DFT we apply the formalism to strongly correlated quantum dots at finite current and temperature. | Session 28: DFT and Beyond |

415 | Linearized GW density matrix for molecules | Bruneval, Fabien | Based on a comprehensive benchmark of 34 molecules, we compare the quality of the ionization potential [1] electronic density, Hartree energy, exchange energy, and the Fock operator expectation values [2] against other well-established quantum chemistry techniques. | Session 28: DFT and Beyond |

416 | Dynamical excitations of charge states in diamond color centers | Pereira Dos Santos, Tatiane; Schleife, Andre | We perform a time-dependent computational study of nitrogen-vacancy centers in diamond under ion irradiation. | Session 28: DFT and Beyond |

417 | Recent progress in the first-principles quantum Monte Carlo: New algorithms in the all-electron calculations | Nakano, Kosuke; Maezono, Ryo; Sorella, Sandro | I will present basic ideas of the new algorithms and show several applications such as a binding energy calculation of the sodium dimer[1]. | Session 28: DFT and Beyond |

418 | Thermo-Optical Properties of Organic Verdazyl Biradicals via UV-VIS Spectroscopy | Gunaydin-Sen, Ozge; Clark, Caitlyn; Ingram, Emily; Brook, David | The analysis suggests, stronger excitations are representative of π→π* transitions while the weaker excitations are representative of forbidden π→π* transitions. | Session 28: DFT and Beyond |

419 | Perdew-Zunger self-interaction correction: How wrong for uniform densities and large-Z atoms? | Santra, Biswajit; Perdew, John | Perdew-Zunger self-interaction correction: How wrong for uniform densities and large-Z atoms? | Session 28: DFT and Beyond |

420 | Constrained optimization of Fermi-orbital descriptors | Trepte, Kai; Peralta, Juan; Jackson, Koblar | In this work, we present a way to constrain the FODs. | Session 28: DFT and Beyond |

421 | New Algorithms for the Fermi-Löwdin Orbital Self-Interaction Correction Calculations. | Sharkas, Kamal; Peralta, Juan; Jackson, Koblar | We propose new algorithms that aim to speed up and extend the applicability of this methodology. | Session 28: DFT and Beyond |

422 | Perdew-Zunger Self-Interaction Correction in Neutral, Protonated, and Deprotonated Water Clusters | Wagle, Kamal; Santra, Biswajit; Sharkas, Kamal; Akter, Sharmin; Zope, Rajendra; Baruah, Tunna; Jackson, Koblar; Peralta, Juan; Perdew, John | We have used LSDA, PBE, SCAN, and the Fermi-Löwdin orbital self-interaction correction (FLOSIC) 1 in conjunction with these DFAs to calculate the binding energies of neutral, protonated [H 3O +(H 2O) n], and deprotonated [OH -(H 2O) n] water clusters, where n denotes the number of water molecules. | Session 28: DFT and Beyond |

423 | Study of water cluster anions using the self-interaction corrected density functional approximations | Vargas, Jorge; Ufondu, Peter; Baruah, Tunna; Jackson, Koblar; Zope, Rajendra | The negative of the highest occupied eigenvalue after SIC provides an excellent approximation to the vertical detachment energy especially for the SIC-PBE wherein the MAE of vDEs with respect to CCSD(T) is only 17 meV, the best amongst all approximations compared in this work. | Session 28: DFT and Beyond |

424 | Fermi-Lowdin orbital self-interaction corrections applied to water clusters: Polarizabilities, dipole moments, and ionization energies | Akter, Sharmin; Yamamoto, Yoh; Zope, Rajendra; Baruah, Tunna | We examine the effect of self-interaction correction on the static dipole polarizabilities of small water clusters (H2O)n for n=1-6 using the Fermi-Lowdin self-interaction correction (FLOSIC) method. | Session 28: DFT and Beyond |

425 | Quasiparticle Energies and Excitation Energies from Ground State DFT Calculations | Yang, Weitao | To achieve a universal elimination of these two errors, we developed a localized orbital scaling correction (LOSC) framework. | Session 28: DFT and Beyond |

426 | Self-consistent first-principles method for extended Hubbard interactions | Lee, Sang-Hoon; Son, Young-Woo | In this presentation, we suggest a scheme to compute the Hubbard parameters self-consistently and ab initio without additional computations for a set of parameters of U and V. | Session 28: DFT and Beyond |

427 | Self-consistent DFT+U+V study of oxygen vacancies in SrTiO3 | Ricca, Chiara; Timrov, Iurii; Cococcioni, Matteo; Marzari, Nicola; Aschauer, Ulrich | Here, for the first time, we apply the extended Hubbard DFT+U+V approach, including on-site (Ti- 3d) as well as inter-site (Ti- 3d and O- 2p) electronic interactions, to study oxygen-deficient STO with Hubbard U and V parameters computed self-consistently via density-functional perturbation theory. | Session 28: DFT and Beyond |

428 | Spectral function database for correlated materials using beyond-DFT methods | Mandal, Subhasish; Haule, Kristjan; Rabe, Karin; Vanderbilt, David | Various beyond DFT methods, such as meta-GGA, hybrid functionals, GW approximation, or dynamical mean-field theory have been developed to describe the electronic structure of correlated materials, but it is unclear how accurate these methods are when applied to a given strongly correlated solid. | Session 28: DFT and Beyond |

429 | Assessment of excited-state molecular geometries with optimally-tuned range-separated hybrid functionals | Kretz, Bernhard; Egger, David | Our focus lies on structural parameters (e.g., bond lengths, bond angles, etc.) of the lowest-excited singlet states, which we compare to high accuracy wave-function data from literature to benchmark our results. | Session 28: DFT and Beyond |

430 | Kohn-Sham Density Functional Theory with Complex, Spin-Restricted Orbitals: Accessing a New Class of Densities without the Symmetry Dilemma | Lee, Joonho; Head-Gordon, Martin | We show that using complex, spin-restricted orbitals in Kohn-Sham (KS) density functional theory allows one to access a new class of densities that is not accessible by either spin-restricted (RKS) or spin-unrestricted (UKS) orbitals [1]. | Session 28: DFT and Beyond |

431 | "Implementation of imaginary time dependent density functional theory to periodic and noncollinear systems" | McFarland, John | We extend imaginary time dependent density functional theory to periodic systems using a modification of the DFT package Quantum ESPRESSO, with the option of noncollinear and DFT+U calculations. | Session 28: DFT and Beyond |

432 | PyProcar: A Python library for electronic structure pre/post-processing | Herath, Uthpala; Tavadze, Pedram; He, Xu; Bousquet, Eric; Singh, Sobhit; Munoz, Francisco; Romero, Aldo | We present PyProcar, a Python package providing graphical representations for electronic structure calculations including band structures and Fermi surfaces as a function of atomic and/or s, p, d, f – orbital projected wavefunctions. | Session 28: DFT and Beyond |

433 | Ultrafast Spin Dynamics with TDDFT | Elliott, Peter | In this talk I will review our findings so far and hope to convince you that ultrafast spin dynamics has been a real success story for TDDFT. | Session 28: DFT and Beyond |

434 | A real-time TDDFT study of CDW phase under femtosecond optical pulse in monolayer 2H-NbSe2 | Ahmed, Towfiq; Zhu, Jian-Xin | In this study, we performed RT-TDDFT calculations to study how the higher-harmonic generation (HHG) behaves in CDW and non-CDW phases of monolayer NbSe2 under different laser field intensities. | Session 28: DFT and Beyond |

435 | Emergence of band gaps, mass enhancement and Jahn-Teller distortions in AFM and PM 3d Oxides from polymorphous DFT | Zunger, Alex; Varignon, Julien | We explored the alternative option of staying within (single determinant) DFT but getting rid of N-DFT. | Session 28: DFT and Beyond |

436 | Characterizing Single-Molecule Magnets using Density Functional Theory | Fitzhugh, Henry; Furness, James; Sun, Jianwei | Many single-molecule magnets are too large for analysis using high-level wavefunction theories, making density functional theory (DFT) an attractive choice. | Session 28: DFT and Beyond |

437 | Exchange-correlation magnetic fields in spin-density-functional theory | Pluhar, Edward; Ullrich, Carsten | We obtain exact benchmark solutions for two electrons on four-site extended Hubbard lattices over a wide range of interaction strengths, and compare exact xc potentials and magnetic fields with approximations obtained from orbital-dependent xc functionals. | Session 28: DFT and Beyond |

438 | A benchmark of predicting magnetic structures using a combination of the cluster multipole expansion and LSDA | Huebsch, Marie-Therese; Nomoto, Takuya; Suzuki, Michi-To; Arita, Ryotaro | A benchmark of predicting magnetic structures using a combination of the cluster multipole expansion and LSDA | Session 28: DFT and Beyond |

439 | TDDFT for spin waves in two-dimensional systems: orbital-based approximations | Anderson, Matthew; Ullrich, Carsten | Instead, we use orbital-based approximations, most notably the Singwi-Tosi-Land-Sjolander (STLS) approach, generalized to systems with noncollinear spin. | Session 28: DFT and Beyond |

440 | The effect of removal of self-interaction error on the magnetic exchange couplings | Chang, Po-Hao; Mishra, Prakash; Zope, Rajendra; Baruah, Tunna | We implement this approach into the UTEP-NRLMOL and FLOSIC codes and apply it, along with Noodleman’s spin-projected (SP) broken-symmetry approach, to study the exchange coupling in a set of molecules. | Session 28: DFT and Beyond |

441 | Self-interaction-corrected electronic structure of Fe-based single-ion magnetic molecule | Karanovich, Anri; Yamamoto, Yoh; Trepte, Kai; Jackson, Koblar; Zope, Rajendra; Baruah, Tunna; Park, Kyungwha | We apply this method to a Fe-based single-ion magnetic molecule with large magnetic anisotropy barrier, using FLOSIC code, in order to study electronic and magnetic properties. | Session 28: DFT and Beyond |

442 | Fermi-Lowdin orbital self-interaction correction on magnetic properties of Cu(II)-acetate monohydrate | Mishra, Prakash; Yamamoto, Yoh; Zope, Rajendra; Baruah, Tunna | We study the magnetic properties of copper acetate monohydrate [Cu(CH3COO) 2(H 2O)] 2 using the Fermi-Lowdin orbital based self-interaction corrected (FLOSIC) density functional method. | Session 28: DFT and Beyond |

443 | Defect Spectroscopy of Ga2O3 | Ringel, Steven; Arehart, Aaron; Ghadi, Hemant; McGlone, Joseph; Farzana, Esmat; Speck, James; Mauze, Akhil; Rajan, Siddharth; Kalarickal, Nidhin; Xia, Zhanbo | This presentation focuses on the ongoing investigation of defect states in the Ga2O3 bandgap using a range of defect spectroscopy methods that enable comprehensive characterization of deep level defects across the entire ~ 4.8 eV bandgap. | Session 29: Defects in Gallium Oxide and Nitride |

444 | Ab initio studies on segregation of n-type dopants and vacancies near beta-Ga2O3(010) surface | Wang, Jingyang; Clancy, Paulette | Using density functional theory, we conducted a comprehensive study on the thermodynamic preferrence of common n-type dopants (Si_Ga, Ge_Ga, Sn_Ga) and intrinsic defects (V_Ga, V_O) both near the (010)-surface and in the bulk of Ga2O3. | Session 29: Defects in Gallium Oxide and Nitride |

445 | Electronic properties of the Ga2O3-Fe2O3 system | Khalid, Shoaib; Sabino, Fernando; Janotti, Anderson | Here we present results for the electronic structure of Fe 2O 3 and Ga 2O 3 in both monoclinic and corundum phases using different exchange correlation functionals. | Session 29: Defects in Gallium Oxide and Nitride |

446 | Unusual Formation of Point Defects and Their Complexes in Ultra-wide Band Gap Beta-Ga2O3 | Johnson, Jared; Chen, Zhen; Varley, Joel; Jackson, Christine; Farzana, Esmat; Arehart, Aaron; Huang, Hsien-Lien; Ringel, Steven; Van de Walle, Chris; Muller, David; Hwang, Jinwoo | We present the first direct microscopic observation of the unusual formation of interstitial-divacancy complexes within beta-Ga2O3 lattice using atomic resolution scanning transmission electron microscopy. | Session 29: Defects in Gallium Oxide and Nitride |

447 | Donor and acceptor properties in Ga2O3 polymorphs | Lyons, John; Wickramaratne, Darshana; Varley, Joel | In this work, we evaluate the properties of acceptor and donor dopants in Ga 2O 3 polymorphs using first-principles calculations based on hybrid density functional theory. | Session 29: Defects in Gallium Oxide and Nitride |

448 | Optical Properties of Acceptor Impurities in Ga2O3 | Chatratin, Intuon; Sabino, Fernando; Reunchan, Pakpoom; Janotti, Anderson | We constructed configuration coordinate diagrams to determine the absorption and emission energies that can be compared with the optical absorption and photoluminescence measurements. | Session 29: Defects in Gallium Oxide and Nitride |

449 | Transition levels for impurities in β-Ga2O3 | Bhandari, Suman; Zvanut, Mary | Transition levels for impurities in β-Ga2O3 | Session 29: Defects in Gallium Oxide and Nitride |

450 | Bismuth-alloyed Ga2O3 as a novel p-type transparent conducting oxide | Cai, Xuefen; Sabino, Fernando P.; Janotti, Anderson; Wei, Suhuai | We show that dilute (Bi xGa 1-x) 2O 3 alloys could be good candidates for novel p-type transparent conducting oxide that will create new opportunities in Ga 2O 3-based device design. | Session 29: Defects in Gallium Oxide and Nitride |

451 | Direct Imaging on Strain Relaxation of MBE-grown Single Phase alpha-(Al,Ga)2O3 on m-sapphire Substrate in Atomic Resolution Using Scanning Transmission Electron Microscopy | Chang, Celesta; Jinno, Riena; Jena, Debdeep; Xing, Huili; Muller, David | Here, we show the relaxation mechanism of such films by performing strain analysis with scanning transmission electron microscopy (STEM). | Session 29: Defects in Gallium Oxide and Nitride |

452 | Ultrafast Optical Measurement of Defect Dynamics in β-Ga2O3 using Supercontinuum Pump-Probe Spectroscopy. | Singh, Arjan; Koksal, Okan; Tanen, Nicholas; Jena, Debdeep; Xing, Huili; Rana, Farhan | In this work, we use optical pump-probe spectroscopy that employs a supercontinuum pulse to probe the defects and their ultrafast dynamics in a wide energy interval within the material bandgap. | Session 29: Defects in Gallium Oxide and Nitride |

453 | X-ray diffraction studies of GaN p-i-n structures for high power electronics | Zimmerman, Alexandra; He, Jiaheng; Cheng, GuanJie; Del Gaudio, Davide; Occena, Jordan; Naab, Fabian; Nami, Mohsen; Li, Bingjun; Han, Jung; Goldman, Rachel | In this work, we examine the p-i interface of a series of GaN p-i-n structures prepared with and without ex-situ ambient exposure and/or chemical etching. | Session 29: Defects in Gallium Oxide and Nitride |

454 | Influence of interfacial defects on the electronic states at GaN p-i-n diode interfaces | Cheng, GuanJie; He, Jiaheng; Zimmerman, Alexandra; Del Gaudio, Davide; Naab, Fabian; Nami, Mohsen; Li, Bingjun; Han, Jung; Goldman, Rachel | Here, we report on the influence of regrowth processing steps on interfacial defects and their electronic signatures. | Session 29: Defects in Gallium Oxide and Nitride |

455 | Study of carbon-related point defects in C-doped GaN using photo-induced electron paramagnetic resonance spectroscopy | Paudel, Subash; Zvanut, Mary; Bockowski, Michal | We used photo-induced electron paramagnetic resonance (EPR) to study point defects in mm thick free-standing 10 17-10 19 cm -3 C-doped GaN. | Session 29: Defects in Gallium Oxide and Nitride |

456 | Phase change material programmable visible photonics | Simpson, Robert; Lu, Li; Ning, Jing; Martinez, Jose; Poh, Alyssa; Parikshit, Moitra; Mass, Tobias; Vytautas_Valuckas, Vytautas; Paniagua, Ramon; Kuznetsov, Arseniy | We will discuss how phase change materials can be used in visible photonics. | Session 30: Defects in Oxides and Chalcogenides |

457 | Electron mobility in crystalline and amorphous metal-oxide semiconductors | Evangelista, Igor; Janotti, Anderson | Here we investigate the microscopic origin of this intriguing effect. | Session 30: Defects in Oxides and Chalcogenides |

458 | Amorphous Oxide Semiconductors: role of disorder and composition in defect formation, carrier generation, and transport properties | Medvedeva, Julia | In this talk, complex deposition-structure-property relationships in several prototype AOSs are discussed. | Session 30: Defects in Oxides and Chalcogenides |

459 | Structural Dynamics in Amorphous Oxide Semiconductors and Its Role on Defect Formation and Transport | Burris, Corey; Medvedeva, Julia | In this work, ab-initio molecular dynamics simulations are combined with accurate density-functional calculations to study time- and temperature-dependent characteristics of defects with different formation energies and degree of localization in amorphous InOx . | Session 30: Defects in Oxides and Chalcogenides |

460 | Structure and properties of amorphous SrTiO3: a first principles study | Zhuravlev, Ivan; Medvedeva, Julia | Here we employ ab-initio molecular dynamics liquid-quench simulations and accurate density-functional calculations to understand how the local and medium-range structural characteristics change upon amorphization in STO. | Session 30: Defects in Oxides and Chalcogenides |

461 | Hydrogen doping of crystalline/amorphous In2O3 interface: the structure and electronic properties. | Sharma, Kapil; Medvedeva, Julia | In this work, amorphous/crystalline In 2O 3 Interface with >100 initial locations of H radical is investigated using ab-initio molecular dynamics and density functional calculations. | Session 30: Defects in Oxides and Chalcogenides |

462 | Thermoelectric properties of Pb2-xYxRu2O7-z pyrochlore | Akhbarifar, Sepideh; Lutze, Werner; Pegg, Ian | This work aims to study the respective properties of lead ruthenate (Pb 2Ru 2O 6.5) doped with yttrium oxide in the temperature range of 25 to 300°C. Lead ruthenate has a defect pyrochlore crystal structure and has metal-like electrical conductivity. | Session 30: Defects in Oxides and Chalcogenides |

463 | Role of defects in photocatalytic water splitting: Monodoped vs codoped SrTiO3 | Kumar, Manish; Bhattacharya, Saswata | We address the role of monodoping of a metal (Mn) and a non-metal (N), as well as their codoping in SrTiO 3 for photocatalytic water splitting using state of the art density functional theory and ab initio atomistic thermodynamics. | Session 30: Defects in Oxides and Chalcogenides |

464 | Rutile GeO2: an ultra-wide-band-gap semiconductor with ambipolar doping | Chae, Sieun; Mengle, Kelsey; Paik, Hanjong; Lee, Jihang; Heron, John; Kioupakis, Emmanouil | We identify Sb Ge, As Ge, and F O as possible donors with low ionization energies and propose growth conditions to avoid charge compensation by native acceptor-type defects. | Session 30: Defects in Oxides and Chalcogenides |

465 | Quasiparticle Properties of Sulfur Doped SrTiO3 | Lopez-Candales, Gabe; Zhang, Peihong | In this work, we report GW quasiparticle calculations of the electronic properties of sulfur doped of SrTiO3 using a recently developed accelerated GW approach [4] that allows efficient GW calculations for large system. | Session 30: Defects in Oxides and Chalcogenides |

466 | Defect physics in rare-earth doped wide band-gap materials | Hoang, Khang | In this talk, we present a hybrid density-functional study of the interaction between RE dopants (Er, Eu, Dy, etc.) and host materials (GaN and SrAl 2O 4), including intrinsic point defects and other impurities that may be present in the host materials. | Session 30: Defects in Oxides and Chalcogenides |

467 | Tuning the Transport Properties of Artificial Synapses: A DFT-Supported Experimental Approach | DAS, DIP; Barman, Arabinda; Sarkar, Pranab Kumar; Hubner, Rene; Kanjilal, Dinakar; Johari, Priya; Kanjilal, Aloke | Tuning the Transport Properties of Artificial Synapses: A DFT-Supported Experimental Approach | Session 30: Defects in Oxides and Chalcogenides |

468 | Hot-electron mediated ion diffusion in semiconductors for ion-beam nanostructuring | Lee, Cheng-Wei; Schleife, Andre | Ion-beam-based techniques are widely utilized to synthesize, modify, and characterize semiconductors at the nanoscale. | Session 30: Defects in Oxides and Chalcogenides |

469 | Evidence for topological surface states in amorphous Bi2Se3 | Corbae, Paul; Ciocys, Samuel; Varjas, Daniel; Grushin, Adolfo; Lanzara, Alessandra; Hellman, Frances | We address whether amorphous topological materials, which lie beyond this classification, exist in the solid state [4]. | Session 31: Defects, Disorder, and Quasiperiodicity in Topological Materials |

470 | Atypical Highly-Dispersive Band Structure in Putative Amorphous Topological Insulator | Ciocys, Samuel; Corbae, Paul; Varjas, Daniel; Grushin, Adolfo; Hellman, Frances; Lanzara, Alessandra | In this work, we discover an exception to this rule in amorphous Bi 2Se 3 films. | Session 31: Defects, Disorder, and Quasiperiodicity in Topological Materials |

471 | Towards Realistic Amorphous Topological Insulators | Costa, Marcio; Schleder, Gabriel; Buongiorno Nardelli, Marco; Lewenkopf, Caio; Fazzio, Adalberto | More specifically, we present a realistic study of the electronic and transport properties of amorphous bismuthene systems, showing that they are topological insulators. | Session 31: Defects, Disorder, and Quasiperiodicity in Topological Materials |

472 | Numerical signatures of disordered topological phases | Reiss, Dominic; Harper, Fenner; Roy, Rahul | We investigate a number of numerical signatures which distinguish the topological and trivial phases of clean and disordered insulators. | Session 31: Defects, Disorder, and Quasiperiodicity in Topological Materials |

473 | Topological Phase Transition in a Disordered Inversion-Symmetric Chain | Velury, Saavanth; Bradlyn, Barry; Hughes, Taylor | In this work, we characterize the phases of a one-dimensional (1D) chain with inversion and chiral symmetries where the disorder preserves the inversion symmetry on every configuration. | Session 31: Defects, Disorder, and Quasiperiodicity in Topological Materials |

474 | Dislocation defect as a bulk probe of monopole charge of multi-Weyl semimetals | Soto Garrido, Rodrigo; Munoz, Enrique; Juricic, Vladimir | We use partial wave analysis to analytically obtain the transmitted current and the conductance. | Session 31: Defects, Disorder, and Quasiperiodicity in Topological Materials |

475 | Bound-state spectrum of superconductors with magnetic-texture defects | Steffensen, Daniel; Andersen, Brian; Kotetes, Panagiotis | Inspired from the above, we explore a novel promising path towards realizing MBSs, which relies on 0D defects in the order parameter describing a textured magnetic order that coexists with spin-singlet superconductivity. | Session 31: Defects, Disorder, and Quasiperiodicity in Topological Materials |

476 | In-gap excitations due to defects in topological superconductor with spin-orbit coupling | Mesaros, Andrej; Ménard, Gerbold; Brun, Christophe; Debontridder, Francois; Roditchev, Dimitri; Simon, Pascal; Cren, Tristan | The theory predicts that this is a Majorana pair, with remarkable isolation in energy thanks to the defect in strong spin-orbit coupling. | Session 31: Defects, Disorder, and Quasiperiodicity in Topological Materials |

477 | CT-symmetric Non-linear Topological Defect Modes | Jeon, Do Hyeok; Reisner, Mattis; Mortessagne, Fabrice; Kuhl, Ulrich; Kottos, Tsampikos | Using a non-linear SSH model we have theoretically analyzed the topological nature of an emerging nonlinear defect mode associated with a non-linear defect. | Session 31: Defects, Disorder, and Quasiperiodicity in Topological Materials |

478 | Aperiodic Topological Boundary Modes: Revisiting Quasi-Periodic Localization | Borgnia, Dan; Slager, Robert-Jan; Vishwanath, Ashvin | Aiming to better understand such systems, this work generalizes key results in translation-invariant systems to their aperiodic counterparts. | Session 31: Defects, Disorder, and Quasiperiodicity in Topological Materials |

479 | The existence of robust edge currents in Sierpinsky Fractals | Fremling, Mikael; van Hooft, Michal; Morais Smith, Cristiane; Fritz, Lars | We investigate the Hall conductivity in a Sierpinski carpet, a fractal of Hausdor dimension d f = ln(8)/ ln(3) ≈ 1.893, subject to a perpendicular magnetic field. | Session 31: Defects, Disorder, and Quasiperiodicity in Topological Materials |

480 | Tracking the mechanism behind graphene ripple inversion with LAMMPs | Mangum, James; Thibado, Paul | Tracking the mechanism behind graphene ripple inversion with LAMMPs | Session 31: Defects, Disorder, and Quasiperiodicity in Topological Materials |

481 | Anomalous Hall effect in chiral superconductors from impurity superlattices | Wang, Zhiqiang; Li, Yu; Huang, Wen | In this work, we consider the effect of impurities embedded in chiral superconductors in a superlattice pattern, instead of in random distributions. | Session 31: Defects, Disorder, and Quasiperiodicity in Topological Materials |

482 | Disorder perturbations of topological superconductor surface fluids: Semiclassical geodesic approach | Davis, Seth; Foster, Matthew | In order to shed light on the DIII results, we consider a semiclassical approach. | Session 31: Defects, Disorder, and Quasiperiodicity in Topological Materials |

483 | Antisite defect enhanced thermoelectric performance of topological crystalline insulators | Muzaffar, Muhammad Usman; Zhang, Shunhong; Cui, Ping; He, Jiaqing; Zhang, Zhenyu | Antisite defect enhanced thermoelectric performance of topological crystalline insulators | Session 31: Defects, Disorder, and Quasiperiodicity in Topological Materials |

484 | Dynamic Dark-Field X-ray Microscopy to Probe Mesoscale Defects and their Dynamics | Dresselhaus-Cooper, Leora | I extend DFXM to study structural dynamics, resolving how material defects show how crystals respond disturbances in their surroundings. | Session 32: Defects: Structure and Strain 2 |

485 | High-throughput identification of point defects in SiC | Davidsson, Joel; Ivady, Viktor; Armiento, Rickard; Abrikosov, Igor | We present the results from the workflow for various vacancy configurations in 4H-SiC. | Session 32: Defects: Structure and Strain 2 |

486 | Theoretical Investigations of the Hyperfine Coupling in Group IV-Vacancy Centers in Diamond Using Hybrid Density Functional Theory | Kuate Defo, Rodrick; Kaxiras, Efthimios; Richardson, Steven | 1,2 In this work we use density-functional theory (DFT) with the HSE06 exchange functional to compute the hyperfine tensors of several paramagnetic Group IV-vacancy centers in diamond and we compare our results with other experimental and theoretical results where available. | Session 32: Defects: Structure and Strain 2 |

487 | Theory on spectral diffusion and electrically driven interferometry of qubits | Udvarhelyi, Péter; Thiering, Gergo; Ivady, Viktor; Gali, Adam | We demonstrate this effect on silicon-vacancy qubit in silicon carbide by first principles methods (SiC) [1,2]. | Session 32: Defects: Structure and Strain 2 |

488 | Progress for high photon collection of color centers in quantum materials | Zhou, Tony; Zhou, Preston; Silverman, Gabriel; Ukah, Kelechi; Xie, Ling; Yacoby, Amir | In this work, we present an effective approach to tackle this fundamental limit and use NV center as an example for its application [3,4]. | Session 32: Defects: Structure and Strain 2 |

489 | Modeling the Electronic Structure of Phosphorus Donor Clusters in Quantum Devices | Campbell, Quinn; Schultz, Peter; Brickson, Mitchell; Jacobson, Noah; Maurer, Leon; Bussmann, Ezra; Misra, Shashank; Baczewski, Andrew | Modeling the electronic structure of phosphorus donor clusters is essential for understanding and predicting the behavior of quantum devices fabricated using atomic precision advanced manufacturing (APAM) techniques. | Session 32: Defects: Structure and Strain 2 |

490 | Electron paramagnetic resonance study of sodium guests in silicon clathrates, a cage-like crystalline silicon allotrope | Schenken, William; Liu, Yinan; Krishna, Lakshmi; Majid, Ahmad; Koh, Carolyn; Taylor, P; Collins, Reuben | We present an EPR study of Na guests in Type II Si clathrate powders with ≤1 at. | Session 32: Defects: Structure and Strain 2 |

491 | Quadrupolar interactions between acceptor pairs in p-doped semiconductors | Durst, Adam; Yang-Mejia, Genesis; Bhatt, Ravindra | Modeling individual acceptors via the spherical model of Baldereschi and Lipari, we calculate matrix elements of the quadrupole tensor between the four degenerate ground states and show that the acceptor has a nonzero quadrupole moment. | Session 32: Defects: Structure and Strain 2 |

492 | Nanoscale NV-detected Electron Spin Resonance at 115 GHz and 4.2 Tesla | Fortman, Benjamin; Pena, Junior; Takahashi, Susumu | Within this talk we present our development and application of adiabatic pulses at 115 GHz to overcome this challenge. | Session 32: Defects: Structure and Strain 2 |

493 | Defects in 4H-SiC Studied by Electrically Detected Magnetic Resonance and Electrically Detected Electron Nuclear Resonance | Waskiewicz, Ryan; Manning, Brian; McCrory, Duane; Lenahan, Patrick | We utilize electrically detected magnetic resonance (EDMR) and electrically detected electron nuclear double resonance (EDENDOR) to observe defects responsible for recombination in fully processed 4H-SiC bipolar junction transistors (BJTs). | Session 32: Defects: Structure and Strain 2 |

494 | Hybrid spintronics as a novel platform for quantum sensing. | Lozovoi, Artur; Jayakumar, Harishankar; Daw, Damon; Meriles, Carlos | We propose a novel spin readout technique 1 based on a non-local hybrid spin-to-charge conversion that takes advantage of drift and diffusion of the charge carriers in semiconductors in the presence of electric field. | Session 32: Defects: Structure and Strain 2 |

495 | High-density defect ensembles in SiC for superradiance and magnetometry | Brereton, Peter; Rittenhouse, Seth; Wiedemann, Joseph; Vanhoy, Jeffrey; Abraham, John | We explore the details of the superradiant transition in the 4H-SiC silicon vacancy and show possible routes toward engineering suitable defect ensembles. | Session 32: Defects: Structure and Strain 2 |

496 | Novel photoinduced charge density wave state and periodic lattice distortion in 1T-TaSe2 | Zhang, Yingchao; Shi, Xun; You, Wenjing; Tao, Zhensheng; Zhong, Yigui; Oppeneer, Peter; Bauer, Michael; Rossnagel, Kai; Kapteyn, Henry; Murnane, Margaret | Here we use a femtosecond laser pulse to displacively excite the coherent amplitude mode in the CDW material 1 T-TaSe 2. | Session 33: Density Waves in Materials |

497 | Suppression of charge density wave transitions in La(Ag1-xAux)Sb2 (0≤x≤1) by pressure. | Bud’ko, Sergey; Xiang, Li; Ryan, Dominic; Canfield, Paul | [1] Here, we report resistivity measurements on La(Ag 1-xAu x)Sb 2 (0≤x≤1) samples at ambient and high pressure that reveal suppression of both CDW transitions by pressure and Au substitution. | Session 33: Density Waves in Materials |

498 | Emergence of charge density wave domain walls network in Pt doped TiSe2 | Iaia, Davide; Lee, Kyungmin; Choe, Jesse; Zhao, Junjing; Li, Juqiang; Shi, Ming; Ma, Junzhang; Yao, Mengyu; Wang, Zhenyu; Ochi, Masayuki; Arita, Ryotaro; Chatterjee, Utpal; Morosan, Emilia; Madhavan, Vidya; Trivedi, Nandini | Here we report a low temperature STM study of Pt-doped TiSe2. | Session 33: Density Waves in Materials |

499 | Scanning Tunneling Microscopy of the Nearly-Commensurate and Incommensurate Charge Density Wave Phases of 1T-TaS2 | Boyer, Michael; Singh, Manoj; Sharma, Bishnu; Yu, Boning | Here we present our scanning tunneling microscopy measurements on the higher-temperature nearly-commensurate and incommensurate CDW phases with a focus on domains, domain walls, and their changes with temperature. | Session 33: Density Waves in Materials |

500 | Charge density wave (CDW) and magnetism in RNiC2 family (R = rare earth metal) | Roman, Marta; Kolincio, Kamil; Klimczuk, Tomasz | Charge density wave (CDW) and magnetism in RNiC2 family (R = rare earth metal) | Session 33: Density Waves in Materials |

501 | Core-level and Resonant Photoemission across the Charge Density Wave Transition in 1T-TiSe2 | Chainani, Ashish; Chuang, Chien-Wen; Tanaka, Yoshikazu; Oura, Masaki; Rossnagel, Kai | We study the electronic structure of the charge density wave (CDW; T CDW= 200 K) material 1T-TiSe 2, using core-level photoemission and valence band resonant photoemission spectroscopy (RESPES) across the Ti L-edge threshold. | Session 33: Density Waves in Materials |

502 | High-temperature charge density wave in rare-earth tetratelluride | Lyu, Baiqing; Zong, Alfred; Wu, Dong; Hashimoto, Makoto; Lu, Donghui; Chen, Su-Di; Li, Man; Huang, Yaobo; Wang, Nan Lin; Gedik, Nuh | Here, by high-resolution angle-resolved photoemission spectroscopy, we demonstrate that in the CDW state, the Fermi surface is fully gapped but the gap size is momentum-dependent. | Session 33: Density Waves in Materials |

503 | Charge Density Wave Order in the Organic Metal α-(ET)2 KHg(SCN)4 | Ghimire, Raju; Laramee, Brett; Ganter, Owen; Islam, Zahirul; Welp, Ulrich; Neu, Jennifer; Agosta, Charles | We will present preliminary scattering data at 4 K to search for incommensurate CDW, below the thermodynamic phase transition at 8K, and contrast it with data at 104 K. | Session 33: Density Waves in Materials |

504 | Origins of Charge-Density Waves in Niobium Diselenide and Tantalum Disulfide using Ultrafast Electron Diffuse Scattering | Pöhls, Jan-Hendrik; Sandor, Margaretha; Otto, Martin; René de Cotret, Laurent; Sutton, Mark; Siwick, Bradley | In this talk, I will present ultrafast electron diffuse scattering to directly observe electron-phonon interactions in charge-density wave (CDW) materials with a time resolution of ~100 fs. | Session 33: Density Waves in Materials |

505 | 3D-ΔPDF analysis of three-dimensional CDW compound (CaxSr1-x)3Rh4Sn13 | Upreti, Puspa; Poudel, Lekhanath; Krogstad, Matthew; Rosenkranz, Stephan; Chmaissem, Omar; Osborn, Raymond | A three-dimensional compound series (Ca xSr 1-x) 3Rh 4Sn 13 has been identified as a promising system to understand the interplay between the charge-density-waves (CDW) and the superconductivity. | Session 33: Density Waves in Materials |

506 | Optical Thermal Diffusivity Measurements in PdxErTe3 | Kountz, Erik; Straquadine, Joshua; Zhang, Jiecheng; Kapitulnik, Aharon; Fisher, Ian | We use a photo-thermal microscope for high resolution thermal diffusivity and optical reflectivity measurements by measuring phase delay in local reflectivity. | Session 33: Density Waves in Materials |

507 | Density Wave Order in Superconducting Nb-Bi2Se3 | Li, Yanan; Parsons, Christian; Ramakrishna, Sanath; Nelson, William; Baumbach, Ryan; Reyes, Arneil; Guptasarma, Prasenjit | Here we report, for the first time, evidence for the coexistence of superconductivity with CDW order from transport measurements on single crystals of Nb x-Bi 2Se 3 (0 < x < 0.25). | Session 33: Density Waves in Materials |

508 | Electronic Raman scattering spectra of various types of BEDT-TTF compounds | Nakamura, YUTO; Takahashi, Toshiki; Hiramatsu, Takaaki; Yoshida, Yukihiro; Saito, Gunzi; Kishida, Hideo | Comparing these electronic Raman signals, we will discuss the electronic states of these compounds. | Session 33: Density Waves in Materials |

509 | Noise spectroscopy across electric field-induced transition in an organic charge-transfer complex | Adhikari, Dasharath; Hu, Yong; Ali, Ahmed; Ren, Shenqiang; Ganapathy, Sambandamurthy | Noise spectroscopy across electric field-induced transition in an organic charge-transfer complex | Session 33: Density Waves in Materials |

510 | Optical Phase Transitions in 1T’-MoTe2 from Thin Film Strain Engineering | Azizimanesh, Ahmad; Pena, Tara; Sewaket, Arfan; Wu, Stephen | In this work, we explore this phase change in 1T’-MoTe 2 through static strain induced by thin film stress capping layers, analogous to the ones used in industrial strained silicon processes. | Session 34: Device engineering of 2D materials |

511 | Versatile multiscale envelope function formalism to study electron transport in lateral transition-metal dichalcogenide heterostructures | Bharadwaj, Sathwik; Ramasubramaniam, Ashwin; Ram-Mohan, L | We integrate k.p perturbation theory, informed from ab-initio electronic structure calculations, with a novel non-asymptotic quantum scattering theory using the method of sources and absorbers [1]. | Session 34: Device engineering of 2D materials |

512 | Characteristics of the localization of massless pseudospin-1 Dirac particles in 2D in a short-range correlated random one-dimensional potential | Kim, Seulong; Kim, Kihong | We study theoretically the characteristics of Anderson localization of two-dimensional massless pseudospin-1 Dirac particles in a correlated random one-dimensional potential. | Session 34: Device engineering of 2D materials |

513 | Strong two-body correlations in WS2 – MoSe2 Heterojunction Tunnel Diodes | Kistner-Morris, Jedediah; Arp, Trevor; Gabor, Nathaniel | Here we report on optoelectronic transport of encapsulated WS 2 – MoSe 2 tunneling heterojunctions, in which we observe anomalous photoconductance and strong rectification. | Session 34: Device engineering of 2D materials |

514 | Transfer-print of graphene, boron nitride and gold patterns onto polymeric materials | Lock, Evgeniya; Gonzalez-Pascual, Gabriella; Choi, Daniel; Villanueva Rodriguez, Sandra; Auyeung, Ray; Kim, Heungsoo; Sridhara, Karthik; Feylgelson, Boris | In this work, we show a multistep approach towards realization of 2D heterostructures on flexible substrates using a dry transfer-print approach based on differential adhesion. | Session 34: Device engineering of 2D materials |

515 | A Novel Type of Water Desalination Technology Using MoS2-Based Thin Films for Selective Ion Transport. | Marcus, Gabriel | A Novel Type of Water Desalination Technology Using MoS2-Based Thin Films for Selective Ion Transport. | Session 34: Device engineering of 2D materials |

516 | Substrate-Induced Dynamical Anti-Screening of Excitons in Quasi-2D Materials: Renormalization of Quasiparticle and Optical Excitations | Ong, Chin Shen; da Jornada, Felipe; Qiu, Diana; Louie, Steven | Here, we show that the frequency dependence of metallic substrate screening can induce a strong anti-screening effect in the quasi-2D insulator and lead to anomalously non-hydrogenic exciton energy levels, i.e., there are dramatic additional changes that go beyond the q-dependent static screening of quasi-2D materials. | Session 34: Device engineering of 2D materials |

517 | Hydrodynamic Anomalous Transport in Interacting Noncentrosymmetric Metals | Toshio, Riki; Takasan, Kazuaki; Kawakami, Norio | In this work, 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 34: Device engineering of 2D materials |

518 | Engineering the electronic, thermoelectric, and excitonic properties of 2D group-III nitrides through alloying (Al1-xGaxN, Ga1-xInxN, B1-xAlxN) | Wines, Daniel; Ersan, Fatih; Ataca, Can | In this study we performed density functional theory (DFT) calculations to investigate 2D Al 1-xGa xN, Ga 1-xIn xN, and B 1-xAl xN alloyed structures. | Session 34: Device engineering of 2D materials |

519 | Intrinsic gap and temperature collapse of the electric conductivity in bilayer graphene | Zarenia, Mohammad; Vignale, Giovanni | Here we demonstrate that the collapse can be explained without invoking electron-phonon scattering by taking into account the fact that the suspended bilayer graphene is not a truly gapless system. | Session 34: Device engineering of 2D materials |

520 | Negative Differential Resistance in MoS2 Esaki Diodes | Bruce, Adam; Wang, Yun-Peng; Liu, Shuanglong; Cheng, Hai-ping | We show both the IV characteristics of our junctions as well as the corresponding partial density of states at biases of interest. | Session 34: Device engineering of 2D materials |

521 | Electrochemical intercalation of organometallic molecules in HfS2-based van der Waals material | Ekuma, Chinedu; Najmaei, Sina; Wilson, Adam; Leff, Asher; Dubey, Madan | We achieve high tunability of the electronic and vibrational properties of the hybrid material. | Session 34: Device engineering of 2D materials |

522 | Electronic States at Lateral Interfaces in Transition Metal Dichalcogenides | Ferris, Kaelyn; Ulloa, Sergio | In this work, we explore the appearance of interfacial states in continuum models of such massive Dirac systems at low energy. | Session 34: Device engineering of 2D materials |

523 | Advanced atomistic models to accurately simulate graphitic nanostructures, bio-interfaces, and aromatic molecules | Kanhaiya, Krishan; winetrout, jordan; Nathanson, Micheal; Heinz, Hendrik | We introduce new atomistic models for the simulation of graphitic nanostructures, bio-interfaces, and aromatic molecules using common energy expressions (CHARMM, AMBER, CVFF, OPLS-AA, PCFF). | Session 34: Device engineering of 2D materials |

524 | Effects of hydrogen, oxygen, and hydroxyl adsorption on the electronic properties of transition metal dichalcogenides | Kopidakis, Georgios; Davelou, Daphne; Maniadaki, Aristea; Remediakis, Ioannis | We present DFT calculations for the stability and electronic structure of semiconducting MX 2 (M=Mo, W and X=S, Se) monolayers and nanostructures with several concentrations of adsorbed hydrogen, oxygen, and hydroxyl and compare our results with pristine systems. | Session 34: Device engineering of 2D materials |

525 | Chiral Qubit: Implementing a Qubit Using Chiral Charge and Chiral Anomaly | Philip, Evan; Kaushik, Sahal; Kharzeev, Dmitri | I will present our theoretical model and estimates regarding the chiral qubit. | Session 35: Dirac and Weyl Semimetals: Theory |

526 | Two-body interaction induces axion/phason field in Weyl semimetals | Schmeltzer, David; Saxena, Avadh | Following our results that the two-body interaction can induce a space and time dependent topological axion term \theta(z,t)[(e^2)/(2\pi \hbar)]( E. B), we show that by applying this theory to a Weyl semimetal with two nodes in a magnetic field a one-dimensional sliding charge density wave (CDW) emerges which replaces the asymptotic effective topological representation, in agreement with the recent experimental finding of J. Gooth et al. [Nature, https://doi.org/10.1038/s41586-019-1630-4 (2019)]. | Session 35: Dirac and Weyl Semimetals: Theory |

527 | Chiral vector field-induced collective fermionic excitations in Weyl semimetals | Cortijo, Alberto; van der Wurff, Erik | We study the single-particle fermionic spectrum of Weyl semimetals in three dimensions taking into account the axial vector character of the electron-phonon interaction. | Session 35: Dirac and Weyl Semimetals: Theory |

528 | Theoretical Study of Resonant Inelastic X-ray Scattering for Monopole Density-wave Order and Superconductivity in Weyl Semimetals | Bobrow, Eric; Abbamonte, Peter; Li, Yi | We generalize this idea to investigate various topological excitations near the emergent Weyl nodes in exotic nodal superconducting and density-wave ordered Weyl semimetal systems characterized by monopole harmonic symmetry. | Session 35: Dirac and Weyl Semimetals: Theory |

529 | Nonlinear Planar Hall as Another Signature of Chiral Anomaly in Weyl Semimetals | Li, Ruihao; Zhang, Shulei; Burkov, Anton; Heinonen, Olle | In this work, we theoretically investigate the transport properties of WSMs in the nonlinear regime, and predict a nonlinear planar Hall effect as another manifestation of chiral anomaly in transport. | Session 35: Dirac and Weyl Semimetals: Theory |

530 | Viscosity as a probe of nodal topology | Moore, Marianne; Surowka, Piotr; Juricic, Vladimir; Roy, Bitan | We here show that depending on the underlying band curvature, the shear viscosity in the collisionless regime displays unique power-law scaling with frequency at low temperatures, bearing the signatures of the band topology, which are distinct from the ones when the system resides at the brink of a topological phase transition into a band insulator. | Session 35: Dirac and Weyl Semimetals: Theory |

531 | Large enhancement of thermopower at low magnetic field in compensated Dirac/Weyl semimetals | Feng, Xiaozhou; Skinner, Brian | We theoretically study the thermoelectric properties of compensated Dirac/Weyl semimetals subjected to a magnetic field. | Session 35: Dirac and Weyl Semimetals: Theory |

532 | Charged Domain Wall of Electric Polarizations in Topological Nodal-Line Semimetals | Sekine, Akihiko; Nagaosa, Naoto | In sharp contrast to the well-known band bending mechanism, the origin of the charged domain wall in this study is purely electronic, i.e., due to the band topology. | Session 35: Dirac and Weyl Semimetals: Theory |

533 | Spin and Pseudo-Spin Collective Modes in Doped Graphene | Kumar, Abhishek; Maslov, Dmitrii | The goal of this work is two-fold: a comprehensive study of collective modes in graphene (a) without spin-orbit coupling (SOC) and (b) in the presence of Rashba and valley-Zeeman SOC. | Session 35: Dirac and Weyl Semimetals: Theory |

534 | Quantum oscillations in Dirac magnetoplasmons | Hofmann, Johannes | We include a full discussion of the loss function in a magnetic field as a function of the direction of propagation with respect to the magnetic field direction and discuss the transition from large magnetic fields to the low-field limit. | Session 35: Dirac and Weyl Semimetals: Theory |

535 | Fermi-arcs and non-local collective modes in thin-film Weyl systems | Verma, Sonu; Giri, Debasmita; Fertig, Herbert; Kundu, Arijit | We study, in particular, plasmonic modes that are non-locally bound in a thin-film Weyl semimetal carrying the signature of bulk and surface mixing and analyze the possibility of their application. | Session 35: Dirac and Weyl Semimetals: Theory |

536 | Effect of charge renormalization on electric and thermo-electric transport along the vortex lattice of a Weyl superconductor | Lemut, Gal; Pacholski, Michal; Adagideli, Inanc; Beenakker, Carlo | Building on the discovery that a Weyl superconductor in a magnetic field supports chiral Landau level motion along the vortex lines, we investigate its transport properties out of equilibrium. | Session 35: Dirac and Weyl Semimetals: Theory |

537 | Effect of Disorder on Edge States in Nodal Topological Materials | Kasturirangan, Saumitran; Ying, Xuzhe; Burnell, Fiona; Kamenev, Alex | To do this, we study the effects of various types of quenched short-range disorder on the energy spectrum, localization, and transport properties of the boundary states of a 2D topological semi-metal in symmetry class BDI. | Session 35: Dirac and Weyl Semimetals: Theory |

538 | Topologically protected Landau level in the vortex lattice of a Weyl superconductor | Pacholski, Michal; Beenakker, Carlo; Adagideli, Inanc | The question whether the mixed phase of a gapless superconductor can support a Landau level is a celebrated problem in the context of d-wave superconductivity, with a negative answer: The scattering of the subgap excitations (massless Dirac fermions) by the vortex lattice obscures the Landau level quantization. | Session 35: Dirac and Weyl Semimetals: Theory |

539 | Nonlocal Response Mediated by Weyl Orbits | Hou, Zhe; Sun, Qing-Feng | Here we investigate a Weyl semimetal slab and find an exotic nonlocal correlation effect when placing two potential wells merely on the top and bottom surfaces. | Session 35: Dirac and Weyl Semimetals: Theory |

540 | Non-local annihilation mechanism in momentum space for correlated Weyl fermions. | Sangiovanni, Giorgio; Amaricci, Adriano; Crippa, Lorenzo; Wagner, Niklas; Budich, Jan; Capone, Massimo | We discuss the effects of interaction in Weyl semimetals with broken time-reversal symmetry. | Session 35: Dirac and Weyl Semimetals: Theory |

541 | Quantum Lifshitz criticality of topological semimetals | Sur, Shouvik; Tyner, Alexander; Goswami, Pallab | We address the nature of such quantum Lifshitz transitions for different topological semimetals, and show how they can strongly influence thermodynamic, spectroscopic, and transport properties of many quantum materials. | Session 35: Dirac and Weyl Semimetals: Theory |

542 | Intrinsic Plasmon damping in Dirac-Fermi liquids | Sharma, Prachi; Maslov, Dmitrii | We explore the consequences of this fundamental difference for the intrinsic damping of plasmons in DFL. | Session 35: Dirac and Weyl Semimetals: Theory |

543 | Internodal tunnelling and magnetotransport in Weyl semimetals | Syzranov, Sergey; Bednik, Grigory; Tikhonov, Konstantin | We study the interplay of such tunnelling with magnetotransport in a Weyl semimetal. | Session 35: Dirac and Weyl Semimetals: Theory |

544 | Low-field anomalous Hall effect in nonmagnetic metals by Wannier interpolation. | Tsirkin, Stepan; Souza, Ivo | As a by-product, we obtain the anomalous g factors of the Bloch states. | Session 35: Dirac and Weyl Semimetals: Theory |

545 | Ultrafast topological phenomena in Weyl semimetals | Nematollahi, Fatemeh; Wu, Jhih-Sheng; Apalkov, Vadym; Stockman, Mark | For Weyl semimetals, we predict that an intense ultrafast (single-oscillation) circularly polarized optical pulse can induce a large population of the conduction band. | Session 35: Dirac and Weyl Semimetals: Theory |

546 | Nodal Chain Semimetal in Geometric Frustrated Acoustic metamaterial | Xiao, Meng; Sun, Xiao-Qi; Fan, Shanhui | We propose to realize such a charged nodal chain in an acoustic metamaterial, based on both tight-binding and full-wave numerical simulations. | Session 35: Dirac and Weyl Semimetals: Theory |

547 | Quantum distance and anomalous Landau levels of flat bands | Rhim, Jun-Won; Yang, Bohm-Jung | We discuss the novel quantum geometric interpretations of them regarding the quantum distance, and how to measure them experimentally. | Session 35: Dirac and Weyl Semimetals: Theory |

548 | Superconductivity in interacting Weyl models: A combined auxiliary-field quantum Monte Carlo and mean-field study | Rosenberg, Peter; Aryal, Niraj; Manousakis, Efstratios | Here we study a simple 2D Weyl model with attractive interactions using a combination of numerically exact auxiliary-field quantum Monte Carlo calculations and mean-field theory [1]. | Session 35: Dirac and Weyl Semimetals: Theory |

549 | The optical conductivity of strongly interacting Dirac fermions: a bosonization approach to the Kadanoff-Baym self-consistent resummation | Mantilla, Sebastian; Sodemann, Inti | We use a bosonization approach to implement exactly a self-consistent Kadanoff-Baym resummation of the electron-hole propagator by mapping the momentum space lattice onto a Heisenberg-type model of interacting spins and employ this approach to determine the frequency dependence of the optical conductivity for Coulomb repulsions. | Session 35: Dirac and Weyl Semimetals: Theory |

550 | SU(3) fermions in a three-band graphene-like model | Pujari, Sumiran; Das, Ankur | Away from them, we obtain new “three-band” Dirac cone structures with associated nonstandard Landau level quantization, whose organization is strongly affected by the non-SU(2) or beyond-Dirac geometric phase structure of the fine-tuned points. | Session 35: Dirac and Weyl Semimetals: Theory |

551 | Topological Semimetals with Butterfly-like Four-Point Intersecting Ellipses | ZHOU, XIAOTING; Aramberri, Hugo; Huang, Cheng-Yi; Vergniory, Maia; Lin, Hsin; Kioussis, Nicholas | In this work, we introduce a new type of nodal line, the butterfly-like four-point-intersecting-ellipses (FPIE) residing in a plane. | Session 35: Dirac and Weyl Semimetals: Theory |

552 | Unconventional Superconductivity and Mott Transition in a Sign-Free Electronic Model | Xu, Xiao Yan; Grover, Tarun | We present preliminary results on the nature of transition between these two phases, and potential spin-liquid phases in its vicinity. | Session 35: Dirac and Weyl Semimetals: Theory |

553 | Cyclotron orbit knot and tunable-field quantum Hall effect | Zhang, Yi | We present a scenario of a Weyl semimetal slab, where the Fermi arcs on the opposing surfaces can cross without interfering with each other and form a knot together with the bulk chiral Landau levels. | Session 35: Dirac and Weyl Semimetals: Theory |

554 | Transport properties of topological semimetal candidate ReSbTe (Re = Sm, Nd, Pr) | Basnet, Rabindra; Pandey, Krishna; Wegner, Aaron; Hu, Jin | Here we present the magnetic transport properties of these topological semimetal candidates that uncovers it’s electronic and magnetic properties. | Session 36: Dirac and Weyl semimetals: Experiment |

555 | Anomalous Hall effect in epitaxial WTe2/VTe2 heterostructures | Tran, Jason; Li, Junxue; Shi, Jing; Wei, Peng | In this talk, we present our studies on the magnetic properties of WTe 2/VTe 2 thin film heterostructures. | Session 36: Dirac and Weyl semimetals: Experiment |

556 | Surface chiral metal in the bulk half-integer quantum Hall effect of BaMnSb2 | Liu, Jinyu; Yu, Jiabin; Ning, Jinliang; Miao, Leixin; Min, Lujin; Agueda Lopez, Kleyser; Zhu, Yanglin; Yi, Hemian; Pillsbury, Timothy; Zhang, Yubo; Wang, Yu; Hu, Jin; Cao, Huibo; Balakirev, Fedor; Weickert, Franziska; 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 unique bulk half-integer QHE observed in a layered Dirac semimetal BaMnSb2. | Session 36: Dirac and Weyl semimetals: Experiment |

557 | Towards Weyltronics: Realization of epitaxial NbP and TaP Weyl Semimetal thin films | Bedoya Pinto, Amilcar; Pandeya, Avanindra; Liu, Defa; Deniz, Hakan; Chang, Kai; Tan, Hengxin; Han, Hyeon; Jena, Jagannath; Kostanovskiy, Ilya; Parkin, Stuart | Here, we report the growth of epitaxial thin films of NbP and TaP by means of molecular beam epitaxy. | Session 36: Dirac and Weyl semimetals: Experiment |

558 | Experimental electronic structure of the switchable, topological, antiferromagnet CuMnAs | Linn, Andrew; Gordon, Kyle; Hao, Peipei; Berggren, Bryan; Reimers, Sonka; Speiser, Nathaniel; Narayan, Dushyant; Smejkal, Libor; Jungwirth, Tomas; Wadley, Peter; Dessau, Daniel | Until now, we lacked experimental confirmation of the predicted electronic band structure, but here we report the electronic structure of tetragonal CuMnAs experimentally measured with ARPES, which we compare to DFT. | Session 36: Dirac and Weyl semimetals: Experiment |

559 | Temperature dependent infrared spectroscopy of PrAlSi | Martin, Catalin; Poudel, Aashish; Sydoryk, Ihor; Martin, Rodica; Hodovanets, Halyna; Kim, Hyunsoo; Paglione, Johnpierre | From Kramers-Kronig analysis, we obtained various optical functions and here we focus in particular on the evolution of the spectral weight with temperature and energy in PrAlSi. | Session 36: Dirac and Weyl semimetals: Experiment |

560 | Planar Hall Effect in the Magnetic Weyl Semimetal Co3Sn2S2 | MONGA, SHAMA; Gopal, Radhe; Singh, Yogesh | We observed this intrinsic effect in single crystals of Co 3Sn 2S 2. | Session 36: Dirac and Weyl semimetals: Experiment |

561 | Giant magneto-optical effect in the magnetic Weyl semimetal Co3Sn2S2 | Okamura, Yoshihiro; Muramoto, Jo; Minami, Susumu; Kato, Yoshihiro; Fujishiro, Yukako; Kaneko, Yoshio; Kaneko, Ryoma; Ueda, Kentaro; Kocsis, Vilmos; Kanazawa, Naoya; Taguchi, Yasujiro; Koretsume, Takashi; Arita, Ryotaro; Tokura, Yoshinori; Takahashi, Youtarou | In this presentation, we will report the magneto-optical study on the recently discovered magnetic WSM Co 3Sn 2S 2 with the giant AHE. | Session 36: Dirac and Weyl semimetals: Experiment |

562 | Extreme Electron-Phonon Coupling in a New Weyl Semimetal | Plisson, Vincent; Burch, Ken; Tafti, Fazel | Here we report on Raman measurements performed on a new Weyl semimetal. | Session 36: Dirac and Weyl semimetals: Experiment |

563 | Doping induced topological phase transition in WTe2 | Rossi, Antonio; Resta, Giacomo; Lee, Seng Huat; Redwing, Ronald; Jozwiak, Chris; Bostwick, Aaron; Rotenberg, Eli; Savrasov, Sergey; Vishik, Inna | We report two non-monotonic changes in the electronic structure of WTe2 upon in-situ electron doping, realizing occupation near the chemical potential as a pathway for tuning structure and behavior of 2D materials. | Session 36: Dirac and Weyl semimetals: Experiment |

564 | Electronic Correlations in Nodal-line Semimetals | Shao, Yinming; Rudenko, Alexander; Hu, Jin; Sun, Zhiyuan; Zhu, Yanglin; Moon, Seongphill; Millis, Andrew; Yuan, Shengjun; Lichtenstein, Alexander; Smirnov, Dmitry; Mao, Zhiqiang; Katsnelson, Mikhail; Basov, Dmitri | Here we report on prominent correlation effects in a nodal-line semimetal compound ZrSiSe through a combination of optical spectroscopy and density-functional-theory calculations. | Session 36: Dirac and Weyl semimetals: Experiment |

565 | Correlated Dirac Semimetal State with Highly Mobile Electrons in Perovskite CaIrO3 | Yamada, Rinsuke; Fujioka, Jun; Kawamura, Minoru; Sakai, Shiro; Hirayama, Motoaki; Arita, Ryotaro; Okawa, Tatsuya; Hashizume, Daisuke; Hoshino, Manabu; Tokura, Yoshinori | In this study, we report the unique quantum transport phenomena of correlated Dirac electrons in perovskite CaIrO 3 with the Mott criticality[3]. | Session 36: Dirac and Weyl semimetals: Experiment |

566 | Unraveling the Topological Phase of ZrTe5 via Magneto-infrared Spectroscopy | Jiang, Yuxuan; Wang, Jingyue; Zhao, Tianhao; Dun, Zhiling; Huang, Qing; Wu, Xiaosong; Mourigal, Martin; Zhou, Haidong; Ozerov, Mykhaylo; Smirnov, Dmitry; Jiang, Zhigang | We have systematically studied the 3D band structure of ZrTe$_5$ up to its parabolic band components using magneto-infrared spectroscopy. | Session 36: Dirac and Weyl semimetals: Experiment |

567 | Observation of fractional states in the the three-dimensional quantum Hall regime of HfTe5 | Galeski, Stanislaw; Zhu, Wenliang; Sudheendra, Shashank; Wawrzynczak, Rafal; Lamba, Neetu; Markou, Anastasios; Felser, Claudia; Chen, Genfu; Gooth, Johannes | In this talk, we report the observation of fractional plateaus in the Hall conductivity of the bulk semimetal HfTe5. | Session 36: Dirac and Weyl semimetals: Experiment |

568 | Fermi Surface Topology and Evidence of Non-trivial Berry Phase in the Flat-band Semimetal Pd3Pb | Khan, Mojammel Alam; Ghimire, Nirmal; Bretz-Sullivan, Terence; Bhattacharya, Anand; Jiang, J; Chang, Po-Hao; Singleton, John; Mitchell, John | We present a study of the Fermi surface of the putative triple point topological semimetal Pd 3Pb carried out by measuring Shubnikov-de Haas (SdH) oscillations in fields of up to 60 T. | Session 36: Dirac and Weyl semimetals: Experiment |

569 | Spin-triplet superconducting state in the nearly ferromagnetic compound UTe2 | Ran, Sheng | In this talk, I will review our recent results on UTe2. | Session 37: Discovery of New Spin-Triplet Superconductivity in Nearly Ferromagnetic UTe2 |

570 | Field- and pressure-induced phenomena in novel 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 37: Discovery of New Spin-Triplet Superconductivity in Nearly Ferromagnetic UTe2 |

571 | 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 reveals a perfect T 3 power law for the electronic DOS below T c which is consistent with the point nodal gap structure determined by thermal conductivity and penetration depth measurements. | Session 37: Discovery of New Spin-Triplet Superconductivity in Nearly Ferromagnetic UTe2 |

572 | Electronic band structure of triplet superconductor UTe2 from angle resolved photoemission spectroscopy | Wray, L. Andrew; Miao, Lin; Liu, Shouzheng; Xu, Yishuai; Kotta, Erica; Ran, Sheng; Paglione, Johnpierre; Denlinger, Jonathan; Butch, Nicholas | 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 37: Discovery of New Spin-Triplet Superconductivity in Nearly Ferromagnetic UTe2 |

573 | Coexistence of ferromagnetic fluctuations and superconductivity in the actinide superconductor UTe2 | Sonier, Jeff | We report low-temperature muon spin relaxation/rotation (μSR) measurements on single crystals of the actinide superconductor UTe 2. | Session 37: Discovery of New Spin-Triplet Superconductivity in Nearly Ferromagnetic UTe2 |

574 | Many-body delocalization of ultracold bosons in lattices | Groß, Christian | Here we present our recent results on the study of the stability of the localization in 2d bosonic lattice systems. | Session 38: Disorder and Localization in AMO Systems |

575 | Instability of subdiffusive spin dynamics in strongly disordered Hubbard chain | Sroda, Maksymilian; Prelovsek, Peter; Mierzejewski, Marcin | To this end, we derive an effective spin model where the spin subdiffusion is shown to be destroyed by arbitrarily weak t ↑ ≠ t ↓. | Session 38: Disorder and Localization in AMO Systems |

576 | Many-body localization from a one-particle perspective in the disordered 1D Bose-Hubbard model | Hopjan, Miroslav; Heidrich-Meisner, Fabian | We numerically investigate 1D Bose-Hubbard chains with onsite disorder by means of exact diagonalization. | Session 38: Disorder and Localization in AMO Systems |

577 | Localization dynamics in a centrally coupled system | Ng, Nathan; Seelam, Rajagopala; Wenderoth, Sebastian; Kolodrubetz, Michael; Rabani, Eran; Thoss, Michael | We investigate a disordered Ising chain in which all spins couple to a central qudit, through which spin flip interactions are mediated. | Session 38: Disorder and Localization in AMO Systems |

578 | Strongly resonating clusters around the ergodic-MBL transition | Villalonga, Benjamin; Clark, Bryan | Here, we argue that the transition between both behaviors is accompanied by the formation of resonating clusters in the eigenstates of the Hamiltonian. | Session 38: Disorder and Localization in AMO Systems |

579 | Inverted many-body mobility edge in a central qudit problem | Rahmanian Koshkaki, Saeed; Kolodrubetz, Michael | In this work, we study the dependence of MBL on energy. | Session 38: Disorder and Localization in AMO Systems |

580 | Emergent ergodicity at the transition between many-body localized phases | Sahay, Rahul; Ye, Bingtian; Machado, Francisco; Yao, Norman | Here, we present evidence that, indeed, a direct transition between different MBL phases cannot occur, and between any two MBL phases, an intervening finite-width thermalizing phase emerges. | Session 38: Disorder and Localization in AMO Systems |

581 | Critical properties of the many-body Aubry-Andre model localization-delocalization transition. | Cookmeyer, Taylor; Motruk, Johannes; Moore, Joel | We investigate the many-particle localization-delocalization transition in the Aubry-Andre model with and without interactions. | Session 38: Disorder and Localization in AMO Systems |

582 | Single doublons as ergodic bubbles | Krause, Ulrich; Pellegrin, Théo; Brouwer, Piet; Abanin, Dmitry; Filippone, Michele | We provide analytical estimates showing how the critical disorder strength for such mechanism depends on singlon densities, which are nicely supported by numerical exact-diagonalization simulations. | Session 38: Disorder and Localization in AMO Systems |

583 | Quasi-1D limit of the integer quantum Hall transition as a disordered Thouless pump | Ippoliti, Matteo; Bhatt, Ravindra | We study the quantum Hall plateau transition on rectangular tori. | Session 38: Disorder and Localization in AMO Systems |

584 | Spin transport in disordered long-range interacting spin chain | Kloss, Benedikt; Bar Lev, Yevgeny | We numerically study spin transport and spin-density profiles after a local quench in a disordered one-dimensional spin-chain with long-range interactions, in the regime where delocalization is predicted by all existing theories. | Session 38: Disorder and Localization in AMO Systems |

585 | Complex network description of phase transitions in the classical and quantum disordered Ising Model | Fasihi, Mina; Cole, Haley; Carr, Lincoln; Garcia Perez, Guillermo; Maniscalco, Sabrina | 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 38: Disorder and Localization in AMO Systems |

586 | Probing Slow Scrambling in MBL and the Random Singlet Phase | MacCormack, Ian; Tan, Mao-Tian; Kudler-Flam, Jonah; Ryu, Shinsei | We characterize the spreading of operators and entanglement in two paradigmatic non-thermalizing phases – the many body localized phase and the random singlet phase – using out-of-time-ordered correlators, the entanglement contour, and operator entanglement. | Session 38: Disorder and Localization in AMO Systems |

587 | High-dimensional disorder-driven phenomena in nodal semimetals and systems with long-range hopping | Syzranov, Sergey | In this talk, I will review existing results on the non-Anderson transitions and other unconventional disorder-driven phenomena in nodal semimetals and related systems (quantum kicked rotors, arrays of ultracold ions, 1D and 2D plasmonic systems, etc.). | Session 39: Disorder-Driven Transitions in Dirac Materials and Related Systems |

588 | Disordered Weyl Semimetals: From Lattice Models to the Continuum | Pixley, Jed | To numerically handle the continuum we represent the Hamiltonian in a "mixed" way between real and momentum space so that we are able to invoke fast Fourier transforms to take advantage of efficient numerical routines (such as Lanczos and the kernel polynomial method) that rely on sparse matrix-vector multiplications. | Session 39: Disorder-Driven Transitions in Dirac Materials and Related Systems |

589 | Nodal points of Weyl semimetals survive the presence of moderate disorder | Buchhold, Michael; Diehl, Sebastian; Altland, Alex | This talk addresses the physics of individual three-dimensional Weyl nodes subject to a moderate concentration of disorder. | Session 39: Disorder-Driven Transitions in Dirac Materials and Related Systems |

590 | Spectrum-wide quantum criticality at the surface of class AIII topological phases: An "energy stack" of integer quantum Hall plateau transitions | Sbierski, Bjoern; Karcher, Jonas; Foster, Matthew | In this paper we show that QHPT states can be realized throughout an energy continuum, i.e. as an "energy stack" of critical states wherein each state in the stack exhibits QHPT phenomenology. | Session 39: Disorder-Driven Transitions in Dirac Materials and Related Systems |

591 | Late time dynamics of dynamical correlation functions and out of time ordered correlators | Riddell, Jonathon; Alhambra, Álvaro; Garcia-Pintos, Luis; Sorensen, Erik | In this talk we study the universal properties of different types of dynamical quantites in time, for large classes of systems. | Session 40: Dynamics – Many Body Theory |

592 | Self-averaging in many-body quantum systems out of equilibrium | Santos, Lea; Schiulaz, Mauro; Torres Herrera, E. Jonathan; Pérez-Bernal, Francisco | We find that self-averaging holds at short times for the quantities that are local in space, while at long times, self-averaging applies for quantities that are local in time. | Session 40: Dynamics – Many Body Theory |

593 | Measurement-induced entanglement dynamics in many-body localizable systems | Lunt, Oliver; Pal, Arijeet | In this work we explore the interplay of two types of entanglement transition: the many-body localization (MBL) transition, where eigenstates go from volume law to area law, and measurement-induced transitions, where recent work has demonstrated that the late-time entanglement entropy of random circuits can collapse from volume to area law above a finite critical measurement rate [1-3]. | Session 40: Dynamics – Many Body Theory |

594 | 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 40: Dynamics – Many Body Theory |

595 | Role of non-linear susceptibilities in non-equilibrium transport through an N-level Anderson impurity model away from half-filling | Teratani, Yoshimichi; Oguri, Akira | We study non-equilibrium SU(N) Kondo effect that occurs in quantum impurity systems at low-temperatures T and low-bias voltages eV. | Session 40: Dynamics – Many Body Theory |

596 | Hamiltonian dynamics of a sum of interacting random matrices | Bellitti, Matteo; Morampudi, Siddhardh; Laumann, Christopher | We analytically obtain the late-time value of〈A(t)A(0)〉; this quantifies the non-relaxing part of the observable A. | Session 40: Dynamics – Many Body Theory |

597 | Universal Dynamics of Stochastically Driven Quantum Impurities | Berdanier, William; Marino, Jamir; Altman, Ehud | We show that the dynamics of a quantum impurity subject to a stochastic drive on one side and coupled to a quantum critical system on the other display a universal behavior inherited from the quantum critical scaling. | Session 40: Dynamics – Many Body Theory |

598 | Non-Equilibrium Dynamics of the SYKq=∞ Model | Kehrein, Stefan | In this talk these analytical results are extended to arbitrary quenches to the q=∞ SYK model. | Session 40: Dynamics – Many Body Theory |

599 | Using charge- and spin-specific local integrals of motion to explore entanglement growth in the disordered Fermi Hubbard model | Wortis, Rachel; Leipner-Johns, Brandon | We explore the coupling of the dynamics in these two channels in the presence of disorder. | Session 40: Dynamics – Many Body Theory |

600 | Scalable probes of measurement-induced phase transitions | Huse, David; Gullans, Michael | Using this order parameter, we identify scalable probes of MIC that are immediately applicable to advanced quantum computing platforms. | Session 40: Dynamics – Many Body Theory |

601 | Higher-order and fractional discrete time crystals in clean long-range interacting systems | Pizzi, Andrea; Knolle, Johannes; Nunnenkamp, Andreas | Here we show that a clean spin-1/2 system in the presence of long-range interactions and transverse field can sustain a huge variety of different ‘higher-order’ discrete time crystals with integer and, surprisingly, even fractional n>2. | Session 40: Dynamics – Many Body Theory |

602 | Time dependent, external perturbations of Hubbard clusters with explicit many electron interactions and their implications | Fernando, Gayanath; Kussow, Adil-Gerai; Palandage, Kalum | We examine the effects of harmonic and other time dependent external perturbations on a many electron system using exact diagonalization and Lanczos method for Hubbard clusters in our search for time crystal and other behaviors such as precursors to superconducting states. | Session 40: Dynamics – Many Body Theory |

603 | Flow Renormalization and Prethermal Regimes of Periodically-Driven Quantum Systems | Claassen, Martin | We develop a flow renormalization approach for periodically-driven quantum systems, for which a rigorous relation between "flow time" and real time can be established. | Session 40: Dynamics – Many Body Theory |

604 | Flow equation approach to periodically driven quantum systems | Vogl, Michael; Laurell, Pontus; Barr, Aaron; Fiete, Gregory | We present a theoretical method to generate highly accurate time-independent Hamiltonians governing the finite-time behavior of time-periodic systems. | Session 40: Dynamics – Many Body Theory |

605 | Fermi-liquid corrections to non-equilibrium Keldysh vertex functions for an Anderson impurity model. | Oguri, Akira; Teratani, Yoshimichi; Sakano, Rui | We study in detail the residual interaction between quasi-particles that plays an essential role in the non-equilibrium transport through quantum dots under finite bias voltage eV. | Session 40: Dynamics – Many Body Theory |

606 | Role of Coulomb correlations in the charge density wave of CuTe | Kim, Sooran; Kim, Bongjae; Kim, Kyoo | Here, using first-principles calculations, we demonstrate that the correlation effect of Cu is critical to stabilizing the 5 × 1 × 2 modulation of Te chains. | Session 41: Electronic Charge and Orbital Ordering |

607 | Optical Enhancement of Superconductivity via Targeted Destruction of Charge Density Waves | Dehghani, Hossein; Raines, Zachary; Galitski, Victor; Hafezi, Mohammad | Motivated by recent optical experiments on superconducting materials, here, we propose a new approach for the enhancement of superconductivity by the targeted destruction of the BDW order. | Session 41: Electronic Charge and Orbital Ordering |

608 | Charge density waves in a quantum plasma | Han, Zhaoyu; Zhang, Shiwei; Dai, Xi | We analyze the instability of an unpolarized uniform quantum plasma consisting of two oppositely charged fermionic components with varying mass ratios against charge and spin density waves. | Session 41: Electronic Charge and Orbital Ordering |

609 | A Quantum Monte Carlo Study of the Effect of Strain on Charge Density Wave Order in the Holstein Model | Cohen-Stead, Benjamin; Scalettar, Richard; Costa, Natanael; Khatami, Ehsan | We investigate charge ordering in the Holstein model in the presence of anisotropic hopping, t x,t y=(1-δ),(1+δ), as a model of the effect of strain on charge density wave (CDW) materials. | Session 41: Electronic Charge and Orbital Ordering |

610 | Charge Density Waves on a Decorated Honeycomb Lattice | Feng, Chunhan; Guo, Huaiming; Scalettar, Richard | In this paper we explore related questions arising from the interplay of multiple kinetic energy scales and electron-phonon interactions. | Session 41: Electronic Charge and Orbital Ordering |

611 | Charge-density-wave melting in the one-dimensional Holstein model | Stolpp, Jan; Herbrych, Jacek; Dorfner, Florian; Dagotto, Elbio; Heidrich-Meisner, Fabian | We study the real-time dynamics in the half-filled Holstein model starting from different initial states that are charge-density-wave (CDW) ordered. | Session 41: Electronic Charge and Orbital Ordering |

612 | Tuning of physical properties through chemical intercalation in two dimensional FexNbTe2 | Li, Sheng; Wu, Hanlin; Taddei, Keith; Wang, Xiqu; Ofenstein, Gareth; Dela Cruz, Clarina; Yang, Li; Lv, Bing | Indeed, through manipulation of the synthetic conditions, we observed drastic changes of crystal symmetry and physical properties in the same material Fe xNbTe 2 with ground state from spin glass insulator to antiferromagnetic metal down to 2K, with more exotic magnetoresistivity and Hall behavior observed. | Session 41: Electronic Charge and Orbital Ordering |

613 | Unity-order refractive index tunability at room temperature in 1T-TaS2, a strongly correlated material | Li, Weijian; Yi, Ming; Kelly, Kevin; Naik, Gururaj | In this work, we study the optical properties of 1T-TaS 2, a quasi-2D material supporting charge density waves (CDW). | Session 41: Electronic Charge and Orbital Ordering |

614 | Probing Finite-Momentum Charge Collective Modes in Electron Doped SrTiO3 | Rubeck, Samantha; Rak, Melinda; Mitrano, Matteo; Husain, Ali; Chen, Jin; Edelman, Alexander; Littlewood, Peter; Abbamonte, Peter | In this talk, I will discuss evidence for hybridization of these modes for different carrier densities. | Session 41: Electronic Charge and Orbital Ordering |

615 | Understanding the relationship between the structural and dielectric changes at the order-disorder transition in TEA(TCNQ)2 | Berlie, Adam; Terry, Ian; Szablewski, Marek; Telling, Mark | We find that two things happen; firstly at 100 K we believe the methyl groups start rotating but at 220 K, the TEA cations rotate with a spehrical radius of ~1.7 Angstroms. | Session 41: Electronic Charge and Orbital Ordering |

616 | The Raman study of the structural transition in metallic LiOsO3 single crystal under high pressure up to 40 GPa | Gao, Junjie; Fu, Suyu; Lin, Jung-Fu; Yamaura, Kazunari; Zhou, Jianshi | In this work, we report the measurements of Raman scattering including polarized and unpolarized models on LiOsO 3 single crystal at different pressure up to 40 GPa with a diamond anvil cell. | Session 41: Electronic Charge and Orbital Ordering |

617 | Evolution of a structural dimerization across a pressure-induced insulator-metal transition in the spin-orbit Mott insulator GaTa4Se8 | Yang, Tsung-Han; Higo, Tomoya; Kawamoto, Shinya; Nakatsuji, Satoru; Plumb, Kemp | I will present a series of low temperature, high pressure x-ray diffraction measurements following the evolution of the structural dimerization in GaTa4Se8 across the pressure-induced insulator to metal transition. | Session 41: Electronic Charge and Orbital Ordering |

618 | NMR Investigation of Ferroquadrupolar Order in TmVO4 | Vinograd, Igor; Wang, Zhipan; Shirer, Kent; Garcia, Daphne; Massat, Pierre; Fisher, Ian; Curro, Nicholas | NMR Investigation of Ferroquadrupolar Order in TmVO4 | Session 41: Electronic Charge and Orbital Ordering |

619 | Electronic Structure of the Electron Nematic BaNi2As2 | Narayan, Dushyant; Hao, Peipei; Gordon, Kyle; Li, Haoxiang; Berggren, Bryan; Whitelock, Hope; Eckberg, Chris; Saraf, Prathum; Collini, John; Paglione, Johnpierre; Dessau, Daniel | Here we present detailed high-resolution ARPES measurements of the Sr xBa 1-xNi 2As 2 series as a function of temperature, comparing the measured band dispersion and Fermi surfaces to density functional theory calculations of the electronic structure carried out in different phases. | Session 41: Electronic Charge and Orbital Ordering |

620 | Effects of Electron Irradiation on Nematic-Like Phase Transition in BaNi2P4 | Krenkel, Elizabeth; Tanatar, Makariy; Timmons, Erik; Wang, Jian; Wang, Lin-Lin; Kovnir, Kirill; Prozorov, Ruslan; Konczykowski, Marcin | We present the results of an experimental study of a tetragonal-to-orthorhombic phase transition with rather high transition temperature (T TO ~380 K) in the clathrate material BaNi 2P 4. | Session 41: Electronic Charge and Orbital Ordering |

621 | Dynamic rotation of monolayer van der Walls heterostructures | Swann, Josh; Chen, Shaowen; Finney, Nathan; Gonzalez-Acevedo, Derick; Yankowitz, Matthew; Dean, Cory | We report on a new technique for fabricating twisted bilayer graphene devices using an Atomic Force Microscope to control this angle with a high degree of precision. | Session 42: Electronic Properties of Graphene Based Twisted Heterostructures: Transport Studies |

622 | Shear phonon modes in twisted bilayer 2D crystals | Kang, Seoung-Hun; Chae, Kisung; Koshino, Mikito; Son, Young-Woo | Based on large scale first-principles computations and molecular dynamics simulations, we present variation of low energy in-plane phonon modes in twisted bilayer 2D crystals such as graphene and transition metal dichalcogenides. | Session 42: Electronic Properties of Graphene Based Twisted Heterostructures: Transport Studies |

623 | Correlated insulating and superconducting states in twisted bilayer graphene below the magic angle | Codecido, Emilio; Wang, Qiyue; Koester, Ryan; Che, Shi; Tian, Haidong; Lv, Rui; Tran, Son; Watanabe, Kenji; Taniguchi, Takashi; Zhang, Fan; Bockrath, Marc; Lau, Chun Ning | Here we report observation of both superconductivity and the Mott-like insulating state in a tBLG device with a twist angle of ~0.93°, which is smaller than the magic angle by 15%. | Session 42: Electronic Properties of Graphene Based Twisted Heterostructures: Transport Studies |

624 | Interaction effects in ultra-clean ABC trilayer/hexagonal boron nitride moire heterostructures | Xie, Tian; Zhou, Haoxin; Ehrets II, James; Spanton, Eric; Taniguchi, Takashi; Watanabe, Kenji; Young, Andrea | Here we will describe techniques to identify and isolate ABC domains in trilayer graphene and incorporate them into dual-graphite gated heterostructures while preserving the stacking order. | Session 42: Electronic Properties of Graphene Based Twisted Heterostructures: Transport Studies |

625 | Characterization of correlated insulating states and superconductivity in twisted bilayer graphene: Part 1 | Arora, Harpreet; Polski, Robert; Zhang, Yiran; Choi, Youngjoon; Ren, Hechen; Watanabe, Kenji; Taniguchi, Takashi; Nadj-Perge, Stevan | Here we study correlated insulating and superconducting states for a range of angles around the magic angle value. | Session 42: Electronic Properties of Graphene Based Twisted Heterostructures: Transport Studies |

626 | Characterization of correlated insulating states and superconductivity in twisted bilayer graphene: Part 2 | Polski, Robert; Arora, Harpreet; Zhang, Yiran; Choi, Youngjoon; Ren, Hechen; Watanabe, Kenji; Taniguchi, Takashi; Nadj-Perge, Stevan | We report sub-Kelvin magnetotransport measurements on TBG for several angles near the magic angle, including measurements of correlated insulators and superconductivity on both hole and electron sides. | Session 42: Electronic Properties of Graphene Based Twisted Heterostructures: Transport Studies |

627 | Engineering Low-Disorder Superlattice Potentials in Graphene-Based Van der Waals Heterostructures | Cohen, Liam; Spanton, Eric; Young, Andrea; Watanabe, Kenji; Taniguchi, Takashi | Here we present the fabrication of sub 40nm pitch, ultra-clean, lithographically defined metal superlattices. | Session 42: Electronic Properties of Graphene Based Twisted Heterostructures: Transport Studies |

628 | Transport study of transition metal dichalcogenide morié superlattices | Li, Tingxin; Li, Lizhong; Tang, Yanhao; Zhu, Jiacheng; Liu, Song; Barmak, Katayun; Watanabe, Kenji; Taniguchi, Takashi; Shan, Jie; Mak, Kin Fai | In this talk, we will present a transport study of angle aligned WSe 2/WS 2 bilayers and discuss properties of the observed correlated insulating states at half filling (i.e. one particle per morié site). | Session 42: Electronic Properties of Graphene Based Twisted Heterostructures: Transport Studies |

629 | High sensitivity thermodynamic measurements of fractional quantum Hall states in graphene | Yang, Fangyuan; Zibrov, Alexander; Bai, Ruiheng; Taniguchi, Takashi; Watanabe, Kenji; Young, Andrea | In this talk, I will present a technique for high sensitivity measurement of the chemical potential in ultra-clean graphene heterostructures, based on a multilayer heterostructure with an embeded graphene layer that functions as an electrometer. | Session 42: Electronic Properties of Graphene Based Twisted Heterostructures: Transport Studies |

630 | Van der Waals Force Driven Ultrahigh-Density Piezoelectric Nano-Generators Arrays | Jiang, Yuhang; Mao, Jinhai; Woods, Colin; Milovanovic, Slavisa; Peeters, Francois; Novoselov, Konstantin; Andrei, Eva | Here we show, when graphene and single layer BN (SLBN) are minimally twisted superposed, the interlayer interactions propel the two lattices rearrangement and induces a spatial modulated strain configuration. | Session 42: Electronic Properties of Graphene Based Twisted Heterostructures: Transport Studies |

631 | Tunable extra Dirac points in one-dimensional graphene superlattice induced by periodic ferroelectric domains | Li, Tianlin; Chen, Hanying; Wang, Kun; Hao, Yifei; Zhang, Le; Hong, Xia | In this work, we investigate the transport signature of one-dimensional superlattice (SL) in monolayer graphene induced by pre-patterned periodic domains in an interfacial ferroelectric bottom layer. | Session 42: Electronic Properties of Graphene Based Twisted Heterostructures: Transport Studies |

632 | Tunable High Workfunction Contacts: Doped Graphene | Belayneh, Merid | In this work, p-doped graphene is investigated using first principles calculations, as a potential high workfunction contact electrode material for device applications. | Session 42: Electronic Properties of Graphene Based Twisted Heterostructures: Transport Studies |

633 | Self-Heated Hotspots in Superconducting Nanowires Cooled by Phonon Black-Body Radiation | Dane, Andrew; Zhu, Di; Onen, Murat; Allmaras, Jason; Baghdadi, Reza; Tambasco, Jean-Luc; Estay Forno, Ignacio; Morimoto, Yukimi; Zhao, Qingyuan; Colangelo, Marco; Charaev, Ilya; Skvortsov, Mikhail; Kozorezov, Alexander; Berggren, Karl | Here, we show that simple DC electrical measurements can be used to estimate the TBC between the nanowire and the substrate. | Session 42: Electronic Properties of Graphene Based Twisted Heterostructures: Transport Studies |

634 | Conductance quantization in cleaved edge overgrowth GaAs quantum wires | Weldeyesus, Henok; Patlatiuk, Taras; Scheller, Christian; Barak, Gilad; Yacoby, Amir; Pfeiffer, Loren; West, Kenneth; Zumbuhl, Dominik | Here, we look at the dependence on wire length, and observe a steeper slope over increasing temperatures in short 2 μm wires compared to 6 μm wires. | Session 42: Electronic Properties of Graphene Based Twisted Heterostructures: Transport Studies |

635 | Emergence of dynamical energy gap in an oscillating graphene membrane | Sandler, Nancy; Zhai, Dawei | We study the effect of a Gaussian-shaped deformation in graphene with a time-periodic amplitude. | Session 42: Electronic Properties of Graphene Based Twisted Heterostructures: Transport Studies |

636 | ARPES Study on the Electronic Structure of Ferromagnet Rb0.93Co1.87Se2 | Huang, Jianwei; Wu, Han; Wang, Zhicai; Pang, Hongsheng; Mo, Sung-Kwan; Kemper, Alexander; Birgeneau, Robert; WANG, MENG; Yi, Ming | Here we use angle-resolved photoemission spectroscopy to study the electronic structure of Rb 0.93Co 1.87Se 2 across the ferromagnetic transition. | Session 43: Electronic Structure of Superconductors (photoemission, etc.) |

637 | ARPES studies of model cuprate high-temperature superconductor | Sreedhar, Sudheer Anand; Anderson, Zachary; Tang, Yang; Greven, Martin; Birgeneau, Robert; Yi, Ming; Vishik, Inna | We will discuss recent progress in identifying three energy scales of interactions near the node and evaluating their evolution with doping, temperature, and momentum. | Session 43: Electronic Structure of Superconductors (photoemission, etc.) |

638 | Further evidence of concurrent mass enhancement and superconductivity in a topological state | Zaki, Nader; Gu, Genda; Johnson, Peter | In this talk, we will review these results and provide more evidence of this phenomenon using low energy laser-based ARPES measurements. | Session 43: Electronic Structure of Superconductors (photoemission, etc.) |

639 | 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 43: Electronic Structure of Superconductors (photoemission, etc.) |

640 | Non-local correlation effect in iron-based superconductors | Zantout, Karim; Backes, Steffen; Valenti, Roser | We therefore present a momentum-dependent and dynamical many-body method, the Two-Particle Self-Consistent (TPSC) approach, and apply it to an ab-initio-derived multi-orbital Hubbard model. | Session 43: Electronic Structure of Superconductors (photoemission, etc.) |

641 | Electronic structure and superconductivity in unconventional cuprates Ba$_2$CuO$_{3+\delta}$ | Jiang, Kun; Le, Congcong; Zhang, Fu-Chun; Wang, Ziqiang; Hu, Jiangping | We study the recently discovered $73$K high-$T_c$ superconductor Ba$_2$CuO$_{3+\delta}$ at $\delta\simeq0.2$ grown under high pressure. | Session 43: Electronic Structure of Superconductors (photoemission, etc.) |

642 | Photoemission studies of BSCCO-2212 across the phase diagram with in-situ control of doping | Drozdov, Ilya; Gu, Genda; Valla, Tonica | In this talk, I will focus on the sample preparation aspects and cover the first two results. | Session 43: Electronic Structure of Superconductors (photoemission, etc.) |

643 | Disappearance of Superconductivity Due to Vanishing Coupling in the Overdoped Cuprate Superconductors | Valla, Tonica; Drozdov, Ilya; Gu, Genda | We present angle-resolved photoemission studies of Bi 2Sr 2CaCu 2O 8+δ single crystals cleaved and annealed in ozone to increase the doping all the way to the non-superconducting phase. | Session 43: Electronic Structure of Superconductors (photoemission, etc.) |

644 | ARPES on Unusual Superconducting Properties of Single-Layer FeSe/SrTiO3 Films | Xu, Yu; wang, qingyan; Rong, Hongtao; Wu, Dingsong; Hu, Yong; Guo, Xinxuan; Zhao, Lin; Liu, Guodong; Xu, Zuyan; Zhou, Xingjiang | Here we report MBE growth of very high-quality single-layer FeSe/STO films, and systematic investigations of their electronic structure and superconducting properties by high-resolution angle-resolved photoemission spectroscopy measurements. | Session 43: Electronic Structure of Superconductors (photoemission, etc.) |

645 | Angle-resolved photoemission spectroscopy of in-situ grown cuprate heterostructures by molecular beam epitaxy | Chen, Zhuoyu; Li, Yuntian; Zhong, Yong; Rebec, Slavko; Jia, Tao; Hashimoto, Makoto; Lu, Donghui; Moore, Robert; Shen, Zhixun | In this talk, we will present the newest results about ARPES on cuprate heterostructures. | Session 43: Electronic Structure of Superconductors (photoemission, etc.) |

646 | Improved Understanding of Gap Dynamics from Time- and Angle-Resolved Photoemission Spectroscopy of a Nonequilibrium Superconductor | Xu, Tianrui; Eilbott, Daniel; Fatuzzo, Claudia; Morimoto, Takahiro; Moore, Joel; Lanzara, Alessandra | With a focus on situations where the standard quasi-static analysis method fails, we present a possible better way to obtain superconducting gap dynamics. | Session 43: Electronic Structure of Superconductors (photoemission, etc.) |

647 | Gap opening in monolayer FeSe/TiO2(100) at low doping | Yan, Chenhui; Faeth, Brendan D.; Schlom, Darrell; Yang, Shuolong; Shen, Kyle | Here we grow monolayer FeSe on rutile TiO 2(100), and show that the gap opens below 40 K with an electron doping of 0.08 electron per iron atom. | Session 43: Electronic Structure of Superconductors (photoemission, etc.) |

648 | Strong particle-hole asymmetry in a 200 Kelvin superconductor | Ghosh, Soham; Quan, Yundi; Pickett, Warren | We present fermionic self-energy results based on first-principles theory for the electron-phonon coupling in H 3S which illustrates strong particle-hole asymmetry in the dynamics arising from the underlying sharp structure in the fermionic density of states. | Session 43: Electronic Structure of Superconductors (photoemission, etc.) |

649 | Band structure motif and bosonic excitations in the fluctuating superconductivity of overdoped cuprates | He, Yu; Chen, Su-Di; Hashimoto, Makoto; Wu, Shan; Chen, Xiang; Song, Yu; Eisaki, Hiroshi; Shen, Zhixun; Birgeneau, Robert | In particular, we discuss the role of the van Hove point on the electronic structure and the partial flat band around it [1]. | Session 43: Electronic Structure of Superconductors (photoemission, etc.) |

650 | Interface-enhanced superconductivity of single layer FeSe grown on non-TiO2 based oxides | Song, Yuan-He; Lou, Xia; Chen, Xiaoyang; Tao, Ran; Yu, Tianlun; Peng, Rui; Xu, Haichao; Ru, Hao; Wang, Yi-Hua; Chen, Zheng; Xie, Yan-Wu; zhang, qinghua; gu, lin; Zhu, Xuetao; Guo, Jiandong; Feng, Donglai | Here we report a new FeSe-based interface, single layer FeSe grown on non-TiO 2 based oxides by molecular beam epitaxy (MBE) method, was successfully obtained. | Session 43: Electronic Structure of Superconductors (photoemission, etc.) |

651 | Development of a high-k gate stack for atomic-precision advanced manufacturing | Lu, Tzu-Ming; Anderson, Evan; Campbell, DeAnna; Marshall, Michael; Lu, Ping; Schmucker, Scott; Tracy, Lisa; Robison, Mitchell; Arghavani, Reza; Maurer, Leon; Baczewski, Andrew; Ward, Daniel; Misra, Shashank | The views expressed in the article do not necessarily represent the views of the DOE or the U.S. Government. | Session 44: Electronic Thin Film Devices and Nanotechnology |

652 | Phase Controlling in HfO2 Bulk Single Crystal | Xu, Xianghan; Huang, Fei-Ting; Cheong, Sang-Wook | We investigate the evolution of structural phases with various thermal treatments and doping. | Session 44: Electronic Thin Film Devices and Nanotechnology |

653 | The effect of air-anneal on two-level tunneling systems of ion-beam sputtered amorphous SiO2 | Liu, Xiao; Abernathy, Matthew; Metcalf, Thomas; Granata, Massimo; Mereni, Lorenzo; Amato, Alex; Michel, Christophe; Cagnoli, Gianpietro | We discuss possible mechanisms for our observations. | Session 44: Electronic Thin Film Devices and Nanotechnology |

654 | Demonstration of two-dimensional hole gases (2DHG) in strained GeSn quantum wells | Tai, Chia-Tse; Lin, Cheng-Yu; Liu, Chia-You; Wang, Tz-Ming; Harris, Charles; Lu, Tzu-Ming; Li, Jiun-Yun | In this work, capacitively induced two-dimensional hole gases in undoped Ge/GeSn heterostructures were demonstrated. | Session 44: Electronic Thin Film Devices and Nanotechnology |

655 | High sensitivity neutron detectors based on hexagonal boron nitride epilayers | Maity, Avisek; Grenadier, Samuel; Li, Jing; Lin, Jingyu; Jiang, Hongxing | Here, we report the epitaxial growth of thick h- 10BN ( 10B enriched) epilayers and demonstration of thermal neutron detectors with a record high detection efficiency. | Session 44: Electronic Thin Film Devices and Nanotechnology |

656 | Defect effects on Electron Magneto-Transport in Quantum Wells | Huang, Danhong; Iurov, Andrii; Gao, Fei; Gumbs, Godfrey | The point-defect effects on the electron magneto-transport in a multiple quantum-well system are investigated by employing a many-body theory. | Session 44: Electronic Thin Film Devices and Nanotechnology |

657 | Atomistic Simulations of the Cold Source Field-Effect Transistor for Sub-60 mV/decade Switching | Prentki, Raphaël; Harb, Mohammed; Guo, Hong | We report the first simulations of CSFETs based on combining the nonequilibrium Green’s functions (NEGF) formalism with the tight-binding (TB) method, thereby capturing the atomistic details of the devices under nonequilibrium conditions. | Session 44: Electronic Thin Film Devices and Nanotechnology |

658 | Looking Back to Look Forward: How scarcity affects electronics cost and drives material research | Reese, Samantha; Carpenter, Alberta; Burton, Robin | Case studies will be presented showing how electronics manufacturing volume effects the raw material cost. | Session 44: Electronic Thin Film Devices and Nanotechnology |

659 | Angular Characterization of Magneto Optical Kerr-Effect by Ellipticity Modulation in Ultrathin Samples | Ramiro-Manzano, Fernando; Meseguer-Sánchez, Jaume; Cantos-Prieto, Fernando; Navarro-Moratalla, Efren | Here, we will show the peculiarities of the experiments and simulations of the angular response of Van der Waalls magnetic materials. | Session 44: Electronic Thin Film Devices and Nanotechnology |

660 | Designing and characterizing rare-earth upconverting nanoparticles as nanoNewton mechanical sensors. | McLellan, Claire; Fischer, Stefan; Siefe, Chris; Casar, Jason; Swearer, Dayne; Fukuhara, Masashi; Goodman, Miriam; Dionne, Jennifer | Using a custom confocal-AFM microscope, we explore the brightness of single UCNPs and are developing techniques to explore their force sensitivity. | Session 44: Electronic Thin Film Devices and Nanotechnology |

661 | Porous Carbon Nanotube Ring Resonators for Gas Sensing Application | McKenna, David; Davis, Henry; Cass, RJ; Vanfleet, Richard; Davis, Robert | We present our work characterizing the gas and time response of these resonators. | Session 44: Electronic Thin Film Devices and Nanotechnology |

662 | Role of dimensionality on thermodynamic properties in layered sulfides | Koocher, Nathan; Rondinelli, James | We formulate layer thickness dependent models of the anharmonic lattice properties and discuss how they may be used for design of thermal expansion coefficients in other chemistries. | Session 44: Electronic Thin Film Devices and Nanotechnology |

663 | Elastic Constants of Boron Arsenide and Boron Phosphide Crystals | Mahat, Sushant; Li, Sheng; Wu, Hanlin; Koirala, Pawan; Lv, Bing; Cahill, David | We report experimental results for picosecond ultrasonics (PU) studies of boron arsenide and boron phosphide crystals with zinc blend structure. | Session 44: Electronic Thin Film Devices and Nanotechnology |

664 | Microscopic model for contact electrification between solids and fluids | Willatzen, Morten; Lew Yan Voon, Lok; Wang, Zhong Lin | We present a new microscopic formalism based on a tight-binding Hamiltonian to describe charge transfer between two materials. | Session 44: Electronic Thin Film Devices and Nanotechnology |

665 | Nanotube-Templated Growth of Transition Metal Dichalcogenide Nanoribbons | Popple, Derek; Meyer, Scott; Cain, Jeffrey; Zettl, Alex | 2,3 In this work, we have employed a bottom-up gas-phase synthesis within carbon nanotubes to template the growth of TMD nanoribbons. | Session 44: Electronic Thin Film Devices and Nanotechnology |

666 | Investigating the Energy Transfer Dynamics in the Baseplate of Green Photosynthetic Bacteria using 2D Electronic Spectroscopy | Carollo, Alexa; Goodson, Carrie; Blankenship, Robert; Frigaard, Niels-Ulrik; Zigmantas, Donatas | In this work, 2D spectra of the baseplate in a mutant of Chlorobaculum tepidum, which was previously found to contain dimeric pigments[2], will be compared to 2D spectra of Chloroflexus aurantiacus to characterize the pigment interactions and energy transfer pathways in both samples. | Session 45: Electronic-Vibrational Coupling in Light Harvesting I. Photosynthetic Light Harvesting |

667 | Probing quantum coherence in photosynthetic energy transfer in the presence of fluctuating environment with levitons and time-dependent nonequilibrium Green functions | Mondal, Priyanka; Nikolic, Branislav; Eisfeld, Alexander | Here we present a prototype that uses a leviton voltage pulse to map a single exciton entering Fenna-Matthews-Olson pigment complex which is mapped as coupled quantum dots with attached leads, in presence of environmental fluctuation coming from molecular dynamics simulation. | Session 45: Electronic-Vibrational Coupling in Light Harvesting I. Photosynthetic Light Harvesting |

668 | Exploring electronic-vibrational coupling in chlorophylls and photosynthetic complexes by polarization-controlled 2D electronic spectroscopy | Zigmantas, Donatas; Bukarte, Egle; Thyrhaug, Erling; Palecek, David; Tempelaar, Roel; Haufe, Anja; Alcocer, Marcelo; Zidek, Karel; La Cour Jansen, Thomas; Bina, David; Knoester, Jasper; Büchel, Claudia | To this end we have employed polarization-controlled 2DES together with advanced Fourier analysis [1]. | Session 45: Electronic-Vibrational Coupling in Light Harvesting I. Photosynthetic Light Harvesting |

669 | Matrix-product-state-based calculations of exciton-phonon dynamics for light-harvesting complexes | Kessing, R. Kevin; Manmana, Salvatore; Cao, Jianshu | Using this accurate, unbiased method, we focus on studying spreading, coherence and entanglement behavior. | Session 45: Electronic-Vibrational Coupling in Light Harvesting I. Photosynthetic Light Harvesting |

670 | Vibronic Structure and Coherence in the Bacterial Reaction Center | Ogilvie, Jennifer; Policht, Veronica | Through analysis of the coherent dynamics of the BRC and careful comparison with monomeric bacteriochlorophyll we report vibronic coherence and identify resonances between a number of key intramolecular pigment vibrations and electronic energy gaps in the BRC. | Session 45: Electronic-Vibrational Coupling in Light Harvesting I. Photosynthetic Light Harvesting |

671 | Modeling Exciton Transport in the Photosystem II Reaction Center via the Modified Generalized Quantum Master Equation | Lenn, Kristina; Mulvihill, Ellen; Gao, Xing; Schubert, Alexander; Geva, Eitan | To do this, we have employed a projection-free version of the Generalized Quantum Master Equation (GQME) whose memory kernel is calculated using approximate methods, such as the Mean-Field Approximation (MFA) and the Linearized Semiclassical Method (LSC). | Session 45: Electronic-Vibrational Coupling in Light Harvesting I. Photosynthetic Light Harvesting |

672 | The Coherence Time of Sunlight | Ricketti, Berke; Gauger, Erik; Fedrizzi, Alessandro | Here we revisit the historic calculations of sunlight coherence starting with the blackbody spectrum and then proceed to provide values for the more realistic case of atmospherically filtered light. | Session 45: Electronic-Vibrational Coupling in Light Harvesting I. Photosynthetic Light Harvesting |

673 | Quantum coherence in a photosynthetic dimer driven by incoherent sunlight | Yang, Pei-Yun; Cao, Jianshu | In this work, we demonstrate noise-induced coherence in a model of a photosynthetic molecular dimer driven by an incoherent radiation field. | Session 45: Electronic-Vibrational Coupling in Light Harvesting I. Photosynthetic Light Harvesting |

674 | Carotenoid-mediated light harvesting in plants Minjung Son, Gabriela Schlau-Cohen | Schlau-Cohen, Gabriela; Son, Minjung | We describe ultrabroadband 2D electronic spectroscopy that enables us to map out the excited states and dynamics of the major antenna complex of plants across the visible region. | Session 45: Electronic-Vibrational Coupling in Light Harvesting I. Photosynthetic Light Harvesting |

675 | Excitons and Polarons in Organic Materials | Spano, Frank; Ghosh, Raja | In this talk the photophysical properties of excitons and polarons in conjugated organic materials are compared and contrasted within the framework of a theory based on the Holstein Hamiltonian, which treats local electron-vibrational coupling exactly. | Session 46: Electronic-Vibrational Coupling in Light Harvesting II. Excitons, Polarons, Perovskites, and Non-Adiabatic Dynamics |

676 | Spectral Signatures and Spatial Coherence of Bound and Unbound Polarons in Organic Semiconductors: Theory vs Experiment | Ghosh, Raja; Luscombe, Christine; Alberto, Salleo; Spano, Frank | Using a theory based on the Holstein Hamiltonian for mobile holes in P3HT, the IR line-shape is successfully reproduced for several recently measured spectra recorded in doped and undoped films, confirming the association of an enhanced peak ratio (A/B) with extended polaron coherence. | Session 46: Electronic-Vibrational Coupling in Light Harvesting II. Excitons, Polarons, Perovskites, and Non-Adiabatic Dynamics |

677 | Correlating Structure and Function in Two-Dimensional Organic-Inorganic Hybrid Perovskites | Kagan, Cherie; Straus, Daniel; Hurtado Parra, Sebastian; Zhao, Qinghua; Kikkawa, James | We study 2DHPs containing single lead iodide layers separated by intervening substituted, phenethylammonium cations with the chemical structure (x-PEA) 2PbI 4, where x=F, Cl, Br, or CH 3. | Session 46: Electronic-Vibrational Coupling in Light Harvesting II. Excitons, Polarons, Perovskites, and Non-Adiabatic Dynamics |

678 | Investigating how biological membrane parameters influence the ring opening of Provitamin D | Sofferman, Danielle; Sension, Roseanne | Here we are studying DHC and its analogs in lipid bilayers as a simple model for biologically relevant skin membrane models. | |

679 | Superradiance of two-dimensional molecular aggregates | Eisfeld, Alex | In this talk I will discuss the superradiant emission of organic molecules arranged on dielectric surfaces. | |

680 | Resonant confinement of an excitonic polariton and ultra-efficient light harvest in artificial photosynthesis | CHEN, Yong-Cong; Song, Bo; Leggett, Anthony; Ao, Ping; Zhu, Xiaomei | Resonant confinement of an excitonic polariton and ultra-efficient light harvest in artificial photosynthesis | |

681 | Semiconductor Junctions for Photon Up and Downconversion: From Nanocrystals to Bulk Solids | Raulerson, Emily; Lee, Inki; Pollok, Brittany; Bender, Jon; Cotton, Daniel; Roberts, Sean | In this presentation, I will review our group’s efforts to produce covalently tethered structures for this purpose. | Session 47: Electronic-Vibrational Coupling in Light Harvesting III. Singlet Fission, Upconversion, and Energy Transfer |

682 | Efficient Triplet Harvesting in an Air-stable Diketopyrrolopyrrole Singlet Fission Solar Cell | Levine, Andrew; Hammer, Joseph; Blain, Saul; HOQUE, MAJHARUL; Narang, Vishal; Braunschweig, Adam; Begliarbekov, Milan | Efficient Triplet Harvesting in an Air-stable Diketopyrrolopyrrole Singlet Fission Solar Cell | Session 47: Electronic-Vibrational Coupling in Light Harvesting III. Singlet Fission, Upconversion, and Energy Transfer |

683 | A Kinetic Description of Ultrafast Excitation, Relaxation, and Charge Transfer in Ru Dye-Semiconductor Systems | Cheshire, Thomas; Boodry, Jeb; Brennaman, M; Giokas, Paul; Zigler, David; Moran, Andrew; Papanikolas, John; Meyer, Gerald; Meyer, Thomas; Houle, Frances | We describe a predictive kinetic framework for ultrafast photophysics of ruthenium polypyridyl dyes in solution and on solid surfaces to probe how kinetic processes such as absorption, relaxation, and intersystem crossing affect excited state lifetimes. | Session 47: Electronic-Vibrational Coupling in Light Harvesting III. Singlet Fission, Upconversion, and Energy Transfer |

684 | Fast algorithm for simulating nonlinear ultrafast spectroscopies | Rose, Peter; Krich, Jacob | We present Ultrafast Ultrafast (UF 2) spectroscopy, a fast algorithm for calculating perturbative n-wave mixing signals in nonlinear optical spectroscopies including arbitrary optical pulse shapes and overlaps. | |

685 | Enhancing vibrationally assisted energy transfer via vibrational cooperativity and interference | Li, Zengzhao; Ko, Liwen; Yang, Zhibo; Sarovar, Mohan; Whaley, Birgitta | Motivated by this demonstration, we investigate how cooperativity and interference of multiple vibrations enhance energy transfer. | |

686 | Electrochemical tuning Localized Surface Plasmon Resonance of Au-Ag core-shell nanoparticle for Surface-Enhanced Raman Scattering | Guo, Jing; Li, Eugene; He, Jin | Electrochemical tuning Localized Surface Plasmon Resonance of Au-Ag core-shell nanoparticle for Surface-Enhanced Raman Scattering | |

687 | Phonon-induced Spin State Relaxation in spin crossover molecule | Park, Haechan; Cheng, Hai-ping; Chen, Jia | This study describes a method development that goes beyond our previous work 1 on phonon-assisted electron relaxation processes where the total spin of the system remains unchanged. | |

688 | Reveal the interplay between high frequency and low frequency intramolecular vibrational mode in ultrafast electron transfer reaction | Rather, Shahnawaz; Fu, Bo; Scholes, Greg | We are presenting a theoretical study of an ultrafast electron transfer reaction by employing the Redfield theory of quantum dissipation dynamics and a model Hamiltonian involving three electronic states and two vibrational modes. | |

689 | Ultrafast Vibronic Dynamics of Singlet Fission: From Molecular Movies to Wavefunction Projection | Pandya, Raj; Schnedermann, Christoph; Alvertis, antonis; Rao, Akshay | Combining excited-state time-domain Raman spectroscopy and tree-tensor network state simulations, we construct the full 108-atom molecular movie of ultrafast singlet fission in a pentacene dimer, explicitly treating 252 vibrational modes on 5 electronic states. | |

690 | Exciton Transport in the Electron-hole System Ta2NiSe5 | Nakano, Akitoshi; Nagai, Takayuki; Katayama, Naoyuki; Sawa, Hiroshi; Taniguchi, Hiroki; Terasaki, Ichiro | In this time we focus on the dielectric constant and thermopower of single crystals of Ta 2NiSe 5. | Session 48: Excitons and Other Collective Electronic Modes |

691 | Time-resolved ARPES signatures of pump driven normal-to-excitonic insulator transition | Perfetto, Enrico; Sangalli, Davide; Marini, Andrea; Stefanucci, Gianluca | We consider a ground-state band insulator turning into a nonequilibrium excitonic insulator (EI) when pumping it at sub-gap frequencies slighlty larger than the excitonic energy. | Session 48: Excitons and Other Collective Electronic Modes |

692 | Dynamics of an order parameter coupled phonon in an excitonic insulator | Ning, Honglie; Mehio, Omar; Buchhold, Michael; Kurumaji, Takashi; Checkelsky, Joseph; Refael, Gil; Hsieh, David | We conducted double-pump coherent phonon spectroscopy measurements on Ta 2NiSe 5 to understand the interaction between the phonon and the excitonic order parameter. | Session 48: Excitons and Other Collective Electronic Modes |

693 | Imaging and Spectroscopy of an Exciton Condensate | Misra, Subhradeep; Stern, Michael; Umansky, Vladimir; Bar-Joseph, Israel | We study the spatial and spectral properties of the photoluminescence of an exciton liquid at low temperatures and show that it evolves from a disordered liquid to a homogenous Bose-Einstein condensate, extending over a few hundred microns and covering the entire area of the mesa. | Session 48: Excitons and Other Collective Electronic Modes |

694 | Bardasis-Schrieffer polaritons in excitonic insulators | Sun, Zhiyuan; Millis, Andrew | We generalize the notion of BS mode to excitonic insulators and show that in s-wave excitonic insulators, a p-wave BS mode exists at energies below the gap energy, has a non-vanishing optical matrix element with light and moreover hybridizes strongly with photons to form Bardiasis-Schreiffer polaritons, which are observable in both far-field and near-field optical experiments. | Session 48: Excitons and Other Collective Electronic Modes |

695 | Discrete breaking of symmetry in the excitonic phase of Ta2NiSe5 | Mazza, Giacomo; Roesner, Malte; Windgaetter, Lukas; Latini, Simone; Rubio, Angel; Georges, Antoine | We derive a minimal electronic model consistent with these symmetries and present evidence of an electronic phase transition related to a spontaneous breaking of these symmetries. | Session 48: Excitons and Other Collective Electronic Modes |

696 | Cluster mean-field analysis of the finite-temperature properties of the one-dimensional extended Falicov-Kimball model | Kadosawa, Masahiro; Nishimoto, Satoshi; Sugimoto, Koudai; Ohta, Yukinori | Motivated by a recent finding that Ta2NiSe5 is in a strong-coupling excitonic insulator state [1], we study finite-temperature properties of the one-dimensional extended Falicov-Kimball model (EFKM), the simplest lattice model for the excitonic insulator state. | Session 48: Excitons and Other Collective Electronic Modes |

697 | Global Spin Current in Excitonic Phases of the Two-Band Hubbard Model | Yamamoto, Shunsuke; Nishida, Hisao; Sugimoto, Koudai; Ohta, Yukinori | Global Spin Current in Excitonic Phases of the Two-Band Hubbard Model | Session 48: Excitons and Other Collective Electronic Modes |

698 | Sign-Free Determinant Quantum Monte Carlo Study of the Bilayer Hubbard and Two-Orbital Hubbard-Kanamori Models | Huang, Xuxin; Claassen, Martin; Moritz, Brian; Devereaux, Thomas | For the Hubbard-Kanamori model, we treat the full rotationally invariant interaction, including the Hubbard and Hund’s coupling terms, using a decoupling scheme which involves a 12-state auxiliary field per site, and present the magnetic correlation and phase transition results obtained from DQMC. | Session 48: Excitons and Other Collective Electronic Modes |

699 | Novel states of charge-imbalanced polariton condensates | Strashko, Artem; Marchetti, Francesca; Macdonald, Allan; Keeling, Jonathan | On top of a balanced polariton and a dark imbalanced FFLO condensates, we find novel imbalanced polaritonic states with coexisting polariton condensate and unpaired electrons with either isotropic or anisotropic Fermi surface depending on applied bias voltage. | Session 48: Excitons and Other Collective Electronic Modes |

700 | π-ton contributions to optical conductivity in correlated electron systems | Kauch, Anna; Pudleiner, Petra; Astleithner, Katharina; Worm, Paul; Watzenböck, Clemens; Thunström, Patrik; Ribic, Tin; Held, Karsten | π-ton contributions to optical conductivity in correlated electron systems | Session 48: Excitons and Other Collective Electronic Modes |

701 | Quantum nematicity in EuB6 | Beaudin, Gabrielle; Bianchi, Andrea; Witczak-Krempa, William | Quantum nematicity in EuB6 | Session 48: Excitons and Other Collective Electronic Modes |

702 | Strong polaron–spin fluctuations drive the insulator–semimetal transition in low-density electron gases | Bianchi, Andrea; Beaudin, Gabrielle; Désilets-Benoit, Alexandre; Samothrakitis, Stavros; Stenning, Kilian; Nicklas, Michael; Gerber, Simon; Egetenmeyer, Nikola; Gavilano, Jorge; Kenzelmann, Michel; Cubitt, Robert; Dewhurst, Charles; Laver, Mark | Here we present results of a small angle neutron scattering (SANS) study showing the dramatic influence of magnetic polarons on ferromagnetic fluctuations in EuB 6, giving clear evidence for their involvement in the insulator-to-metal transition as the result of large scale magnetic fluctuations. | Session 48: Excitons and Other Collective Electronic Modes |

703 | Long-Lived Excitations, Directional Memory and Hydrodynamic Transport in Two-Dimensional Electron Fluids | Levitov, Leonid | Long-Lived Excitations, Directional Memory and Hydrodynamic Transport in Two-Dimensional Electron Fluids | Session 49: Exotic Collective Excitations and Topology-Driven Dynamics in Quantum Materials |

704 | Levy flights and non-local transport in Dirac and Weyl systems | Schmalian, Joerg | We show that hydrodynamic collision processes of Dirac and Weyl systems can be described in terms of a Fokker-Planck equation with fractional derivative, corresponding to a Lévy flight in momentum space. | Session 49: Exotic Collective Excitations and Topology-Driven Dynamics in Quantum Materials |

705 | Mirage and hidden 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 49: Exotic Collective Excitations and Topology-Driven Dynamics in Quantum Materials |

706 | Collective modes in pumped unconventional superconductors with competing ground states: Bardasis-Schrieffer mode and time-reversal symmetry broken states | Eremin, Ilya | Motivated by the recent development of terahertz pump-probe experiments, we investigate the short-time dynamics in superconductors with multiple attractive pairing channels. | Session 49: Exotic Collective Excitations and Topology-Driven Dynamics in Quantum Materials |

707 | Spectroscopies of superconducting collective modes: new advances and open questions | Benfatto, Lara | In this talk I will present a general scheme we recently developed [1,2] to describe step-by-step the processes behind the pump-probe detection of collective excitations, that can be equally well applied to ordinary phonons as well as electronic collective modes. | Session 49: Exotic Collective Excitations and Topology-Driven Dynamics in Quantum Materials |

708 | Aharonov-Casher effect with vortices in an amorphous superconductor | Roy, Arnab; Frydman, Aviad | In this study with amorphous indium oxide close to a disorder driven SIT, we introduce vortices in the system by applying a perpendicular magnetic field. | Session 50: Exotic Features of Superconductors |

709 | IDEAL DIAMAGNETIC RESPONSE OF A PRISTINE GRAPHENE-n-HEPTANE-PERMALLOY SYSTEM | Teknowijoyo, Serafim; Kawashima, Yasushi; Dulal, Rajendra; Chahid, Sara; Gulian, Armen | We explored magnetic screening of milligauss fields in a system comprised of a single-layer graphene (on various substrates) wetted by n-heptane in the presence of a thin Fe-Ni foil parallel to the graphene layer. | Session 50: Exotic Features of Superconductors |

710 | Odd Frequency Pairing in Supercodcuting Systems Using Renormalization Group Approach | Ejigu, Henoc | In our work, by considering a two-dimensional rotationally invariant Fermi surface and spinless system within the framework of renormalization group, we present a brief elucidation on the microscopic mechanism for odd frequency pairing, and show a self-contained derivation of the exact flow equation for the vertex functions and self energy that depend on the gradual evolution of the microscopic model action to the final effective action as a function of a continuously decreasing energy scale. | Session 50: Exotic Features of Superconductors |

711 | Local structure of the cuprate superconductors | Anderson, Zachary; Pelc, Damjan; Krogstad, Matthew; Biniskos, Nikolaos; Yu, Biqiong; Thompson, Liam; Zwettler, Jack; Spieker, Richard; Bielinski, Nina; Rosenkranz, Stephan; Osborn, Raymond; Greven, Martin | Here we present complementary X-ray and neutron diffuse scattering studies of several cuprates, with the real-space local structure determined by the 3D ΔPDF method [3]. | Session 50: Exotic Features of Superconductors |

712 | Plasticity and stress engineering of cuprate superconductors | Pelc, Damjan; Anderson, Zachary; Thompson, Liam; Krogstad, Matthew; Biniskos, Nikolaos; Yu, Biqiong; Zwettler, Jack; Spieker, Richard; Bielinski, Nina; Rosenkranz, Stephan; Osborn, Raymond; Greven, Martin | We present here the surprising discovery of room-temperature plasticity in the cuprates, observed with compressive stress perpendicular to the copper-oxygen planes. | Session 50: Exotic Features of Superconductors |

713 | Thermodynamic Evidence for a Multi-component superconducting order parameter in Sr2RuO4 | Ghosh, Sayak; Shekhter, Arkady; Jerzembeck, Fabian; Kikugawa, Naoki; Sokolov, Dmitry; Mackenzie, Andrew; Hicks, Clifford; Ramshaw, Brad | We observe a thermodynamic discontinuity in one of the shear moduli (c 66) at T C, which requires a two-component superconducting order parameter ( E representation of D4h). | Session 50: Exotic Features of Superconductors |

714 | Manipulating superconductivity in Sr2RuO4 thin films through epitaxial strain | Nair, Hari; Schreiber, Nathaniel; Ruf, Jacob; Miao, Ludi; Fang, Yawen; Lee, Yonghun; Brützam, Mario; Guguschev, Christo; Ramshaw, Brad; Shen, Kyle; Schlom, Darrell | To test this concept, we explore the effect of biaxial strains from –0.9% to +1.0% imposed by commensurate epitaxy on (NdAlO 3) 0.39—(SrAl 1/2Ta 1/2O 3) 0.61 (NSAT), NdGaO 3, (LaAlO 3) 0.29—(SrAl 1/2Ta 1/2O 3) 0.71 (LSAT), LaGaO 3, and SrTiO 3 substrates on the superconducting Tc and upper critical field Hc 2 of Sr 2RuO 4 thin films. | Session 50: Exotic Features of Superconductors |

715 | Spectroscopic study of doped strontium ruthenates compositions | Dulal, Rajendra; Nikoghosyan, Vahan; Gorshunov, Boris; Zhukova, Elena; Aleschenko, Yuri; Muratov, Andrey; Teknowijoyo, Serafim; Chahid, Sara; Gulian, Armen | We present compositional, morphological, structural, magnetotransport, heat capacity, magnetic susceptibility, Raman and terahertz spectroscopy data to facilitate theoretical analysis of metamagnetism vs. superconductivity in this material. | Session 50: Exotic Features of Superconductors |

716 | μSR study on the antiperovskite oxide supercondctor Sr3−xSnO | Ikeda, Atsutoshi; Guguchia, Zurab; Koibuchi, Shun; Oudah, Mohamed; Yonezawa, Shingo; Luetkens, Hubertus; Maeno, Yoshiteru | Under small magnetic fields, we successfully observed increase of the relaxation rate of μ + below the transition temperature and confirmed the bulk superconductivity. | Session 50: Exotic Features of Superconductors |

717 | Strain sensitivity and other experimental consequences of nematic-mediated superconductivity | Lederer, Samuel; Berg, Erez; Kim, Eun-Ah | We therefore propose several sharp empirical tests, supported by quantitative calculations in a simple model of this material. | Session 51: Exploring the Relation Between Electron Nematicity and Superconductivity in Strongly Correlated Electronic Systems |

718 | Sixfold enhancement of superconductivity in a tunable electronic nematic system | Paglione, Johnpierre | We present measurements of the resistance as a function of strain in Ba$_{1-x}$Sr$_{x}$Ni$_2$As$_2$ to show that strontium substitution promotes an electronically-driven nematic order in this system. | Session 51: Exploring the Relation Between Electron Nematicity and Superconductivity in Strongly Correlated Electronic Systems |

719 | Atomic-scale Interplay of the Charge Density Wave, Pair Density Wave and Nematic States of Cuprates. | Davis, J.C. | We discuss how this perplexingly linked phenomenology of two highly distinct broken-symmetry states may be understood as the natural consequence of a vestigial nematic state within the pseudogap phase of Bi2Sr2CaCu2O8. | Session 51: Exploring the Relation Between Electron Nematicity and Superconductivity in Strongly Correlated Electronic Systems |

720 | Strain-tuning nematic order and signatures of nematic quantum criticality | Fisher, Ian | I will describe how both symmetric and orthogonal antisymmetric strains can play this role, and demonstrate these effects in an archetypal Fe-based superconductor. | |

721 | Divergent nematic susceptibility near the pseudogap critical point in Bi-cuprate superconductors | Shibauchi, Takasada | Here we report elastoresistance measurements of nematic susceptibility in (Bi,Pb) 2Sr 2CaCu 2O 8+δ, which is sensitive to an electronic order with twofold in-plane anisotropy. | |

722 | Actuating and probing a single-molecule switch at femtosecond timescales | Peller, Dominik; Kastner, Lukas; Buchner, Thomas; Roelcke, Carmen; Albrecht, Florian; Huber, Rupert; Repp, Jascha | To resolve the impact of coherent control of the single-molecule switch, alongside, we introduce single-shot action spectroscopy in lightwave STM as the first concept resolving individual path-selective reaction events of a single molecule in space and time. | Session 52: Fast Electronic Time-Resolved Scanning Probe Spectroscopy |

723 | A Poor Person’s Approach to STM based Pump-Probe and Pulsed-ESR Methods | Natterer, Fabian | Here we introduce a versatile, straightforward, and affordable setup to achieve nanoseconds time-resolution with minimal changes to an existing STM system [1]. | Session 52: Fast Electronic Time-Resolved Scanning Probe Spectroscopy |

724 | Single-atom qubits on a surface: pulsed electron spin resonance in a scanning tunneling microscope | Yang, Kai | In the first part, I will describe the implementation of continuous-wave ESR in STM [1], which has allowed the measurement of the magnetic interaction between individual atoms [2–5] as well as the detection and control of nuclear spins [6, 7]. | Session 52: Fast Electronic Time-Resolved Scanning Probe Spectroscopy |

725 | Resolving fast dynamics through measurement in the frequency domain | Borgani, Riccardo; Haviland, David | These methods capture information in the frequency domain with high signal-to-noise ratio through measurement of intermodulation between two or more drive tones. | Session 52: Fast Electronic Time-Resolved Scanning Probe Spectroscopy |

726 | A strongly inhomogeneous superfluid in an iron-based superconductor | Allan, Milan | In this seminar, I will present our recent atomic-resolution Josephson scanning tunneling microscopy study that reveal a strongly inhomogeneous superfluid in an iron-based superconductor. | Session 53: Fe-Based Superconductors – Inhomogeneous Order Parameter |

727 | Superconducting Fluctuations and Pairing Enhancement in Ultra-Thin FeSe/SrTiO3 | Faeth, Brendan; Yang, Shuolong; Kawasaki, Jason; Nelson, Jocienne; Mishra, Pramita; Li, Chen; Schlom, Darrell; Shen, Kyle | To better understand the influence of the STO phonon contribution, we systematically explore the evolution of superconductivity as measured unambiguously by in situ electrical resistivity under varied conditions of film thickness, surface doping concentration, and substrate interface condition. | Session 53: Fe-Based Superconductors – Inhomogeneous Order Parameter |

728 | Nonlocal Correlations in Iron Pnictides and Chalcogenides | Bjornson, Kristofer; Bhattacharyya, Shinibali; Zantout, Karim; Kreisel, Andreas; Valenti, Roser; Andersen, Brian; Hirschfeld, Peter | By calculating the renormalized bandstructure in both random phase approximation and the two-particle self-consistent approximation, we show that correlations in pnictide systems like LaFeAsO and LiFeAs can be described rather well by nonlocal correlations. | Session 53: Fe-Based Superconductors – Inhomogeneous Order Parameter |

729 | Tunable impurity states in the unconventional superconductor FeTe0.55Se0.45 | Chatzopoulos, Damianos; Cho, Doohee; Bastiaans, Koen; Gu, Genda; Allan, Milan | In this talk I will discuss possible mechanisms that can lead to this dispersive behavior of the impurity energy state in space. | Session 53: Fe-Based Superconductors – Inhomogeneous Order Parameter |

730 | kz selective scattering within Quasiparticle Interference measurements of FeSe | Rhodes, Luke; Watson, Matthew; Kim, Timur; Eschrig, Matthias | Here, we show that this is not necessarily the case. | Session 53: Fe-Based Superconductors – Inhomogeneous Order Parameter |

731 | STM studies on FeSexTe1-x thin films grown on Bi2Te3 single crystal | Chen, Guannan; Jiao, Lin; Olivares Rodriguez, Jorge; Aishwarya, Anuva; Dong, Lianyang; Wilson, Stephen; Madhavan, Vidya | If time permits, we will present our measurements of Fourier transform quasiparticle interference (QPI) for studying the order parameter. | Session 53: Fe-Based Superconductors – Inhomogeneous Order Parameter |

732 | Visualization of impurity-induced magnetism in FeSe using scanning tunneling microscopy | Song, Sang Yong; Seo, Jungpil | Here, we show the local magnetism is directly induced by impurities of FeSe using scanning tunneling microscopy (STM). | Session 53: Fe-Based Superconductors – Inhomogeneous Order Parameter |

733 | High-field superconducting phase in FeSe investigated by spectroscopic-imaging scanning tunneling microscopy | Hanaguri, Tetsuo; Machida, Tadashi; Sato, Yuki; Kasahara, Shigeru; Shibauchi, Takasada; Matsuda, Yuji | We performed high-field spectroscopic-imaging scanning tunneling microscopy at an ultra-low temperature below 90 mK to investigate the change in the electronic state across the phase boundary. | Session 53: Fe-Based Superconductors – Inhomogeneous Order Parameter |

734 | Probing antiferromagnetic order of iron-based superconductors through the surface | Ge, Zhuozhi; Zou, Qiang; Fu, Mingming; Rajput, Shivani; Sanjeewa, Liurukara; Sefat, Athena; Li, Lian; Gai, Zheng | Here, we systematically investigated low-temperature cleaved parent and slightly doped BaFe2As2 superconductors by scanning tunneling microscopy/spectroscopy (STM/S). | Session 53: Fe-Based Superconductors – Inhomogeneous Order Parameter |

735 | Investigation of the FeSe/SrTiO3 interface using Atom Probe Tomography | O’Sullivan, Samantha; Kang, Ruizhe; Matt, Christian; Hoffman, Jason; Hoffman, Jennifer | Here we characterize the interface using atom probe tomography (APT), which reveals the structural and chemical properties of the FeSe/STO interface and provides insight into the origin of the material’s superconductivity. | Session 53: Fe-Based Superconductors – Inhomogeneous Order Parameter |

736 | Imaging Nematic Transitions in Iron-Pnictide Superconductors with a Quantum Gas | Yang, Fan; Taylor, Stephen; Edkins, Stephen; Palmstrom, Johanna; Fisher, Ian; Lev, Benjamin | We conduct simultaneous and spatially resolved measurements of both bulk and surface manifestations of nematicity via transport and structural deformation channels, respectively. | Session 53: Fe-Based Superconductors – Inhomogeneous Order Parameter |

737 | Manipulating superconductivity of monolayer FeSe on graphene/SiC(0001) surface | Huang, Wan-tong; Lin, Haicheng; Zheng, Cheng; Yin, Yuguo; Cai, Xinqiang; Ji, Shuai-Hua; Chen, Xi | For FeSe monolayer grown on graphene/SiC(0001) surface, we find the Fermi energy is in the range of a few meV. | Session 53: Fe-Based Superconductors – Inhomogeneous Order Parameter |

738 | Signature of Dispersing 1D Majorana Channels in an Iron-based Superconductor | Madhavan, Vidya | This talk is focused on our recent work in realizing dispersing Majorana modes. | Session 54: Fe-Based Superconductors – Mayorana / Topological |

739 | Longer-range exchange interaction in iron-based superconductors: First-principles studies | Yin, Weiguo | The spin dynamics in FeSCs has been interpreted by using such spin-only Heisenberg models with exchange couplings extended to the third nearest neighbors, i.e., the J1-J2-J3 model. | Session 54: Fe-Based Superconductors – Mayorana / Topological |

740 | Quasiparticle self-consistent GW analysis in iron-based superconductors | Suzuki, Katsuhiro; Ogura, Taishi; Sakakibara, Hirofumi; Kotani, Takao; Ikeda, Hiroaki | In this study, we calculated the electronic band structure of iron-based superconductors with the quasiparticle self-consistent GW (QSGW) method. | Session 54: Fe-Based Superconductors – Mayorana / Topological |

741 | Search for evidence of quantum anomalous vortices in Iron-based Topological Superconductor Fe1+yTe1−xSex | Li, Lu; Chen, Lu; Xiang, Ziji; Tinsman, Colin; Gu, Genda | We solve the problem by thermally drive ordinary superconducting vortices around these Majorana zero modes and search for a transverse electrical response. | Session 54: Fe-Based Superconductors – Mayorana / Topological |

742 | The Triplet Resonating Valence Bond State and Superconductivity in Hund’s Metals: I Concept and Symmetries | Coleman, Piers; Komijani, Yashar; Koenig, Elio | Here, we argue that a spin-triplet RVB (tRVB) state, driven by spatially, or orbitally anisotropic ferromagnetic interactions can provide the parent state for triplet superconductivity. | Session 54: Fe-Based Superconductors – Mayorana / Topological |

743 | Title: The Triplet Resonating Valence Bond State and Superconductivity in Hund’s Metals: II Mean-field theory | Coleman, Piers; Komijani, Yashar; Koenig, Elio | I will discuss how this can be used to derive a local inter-orbital triplet pairing applicable to Iron-based superconductors [2]. | Session 54: Fe-Based Superconductors – Mayorana / Topological |

744 | The Triplet Resonating Valence Bond State and Superconductivity in Hund’s Metals: III Phenomenology in iron based superconductors. | Coleman, Piers; Komijani, Yashar; Koenig, Elio | Based on the triplet Resonating Valence Bond concept introduced in the previous two talks, I will discuss the prospects and signatures of this theory in the context of iron based superconductors. | Session 54: Fe-Based Superconductors – Mayorana / Topological |

745 | Unconventional superconductivity and Hund’s induced electron correlations: a Cooperative mechanism | Fanfarillo, Laura; Valli, Angelo; Capone, Massimo | To overcome this dychotomy we study how a multiorbital superconducting pairing driven by a generic weak-copuling boson exchange is affected by the presence of correlations. | Session 54: Fe-Based Superconductors – Mayorana / Topological |

746 | Hund-enhanced electronic compressibility in LiFeP, LiFeAs and NaFeAs tuned by chemical substitution | Villar Arribi, Pablo; De Medici, Luca | We study the electronic structure of LiFeP, LiFeAs and NaFeAs in their paramagnetic metallic phase including dynamical electronic correlations within a density functional theory + slave-spin mean-field framework. | Session 54: Fe-Based Superconductors – Mayorana / Topological |

747 | Modified pairing structure due to momentum-dependent correlations in iron-based superconductors | Bhattacharyya, Shinibali; Hirschfeld, Peter; Maier, Thomas; Scalapino, Douglas | We discuss the influence of momentum-dependent correlation effects arising from particle-hole interactions on the superconducting gap structure of iron-based superconductors. | Session 54: Fe-Based Superconductors – Mayorana / Topological |

748 | Systematic derivation of ab initio effective Hamiltonians for iron-based superconductors | Misawa, Takahiro; Ido, Kota; Motoyama, Yuichi; Yoshimi, Kazuyoshi | In this study, combining the first-principles calculations and accurate numerical methods for treating quantum lattice models [1], we systematically obtain and analyze first-principle effective Hamiltonians of more than 20 iron-based superconductor and the related compounds. | Session 54: Fe-Based Superconductors – Mayorana / Topological |

749 | Topological bands in Fe(Se,Te) | Hazra, Tamaghna; Lohani, Himanshu; Ribak, Amit; Nitzav, Yuval; Fu, Huixia; Yan, Binghai; Randeria, Mohit; Kanigel, Amit | We reconcile the observed lack of dispersion with the predicted band inversion using a tight binding model with strongly renormalized inter-layer hopping and reasonable values of spin-orbit coupling. | Session 54: Fe-Based Superconductors – Mayorana / Topological |

750 | Ultrafast dynamics in single-layer FeSe/SrTiO3, (Li0.84Fe0.16)OHFe0.98Se, and Sr3Ir2O7: revealing coupling between different degrees of freedom | Zhao, Jimin | We have demonstrated ultrafast dynamics evidence of high-T c superconductivity in single-layer FeSe/SrTiO 3, with clear identification of the SC T c, SC gap, and electron-phonon coupling (EPC) constant λ. | Session 55: Fe-Based Superconductors – Mostly FeSe & FeTe |

751 | Frustrated spin order in FeSe | Baum, Andreas; Ruiz, Harrison; Lazarević, Nenad; Wang, Yao; Boehm, Thomas; Hosseinian Ahangharnejhad, Ramez; Wolf, Thomas; Moritz, Brian; Devereaux, Thomas; Hackl, Rudolf | We find the Raman response from FeSe to be more similar to localized systems such as cuprates. | Session 55: Fe-Based Superconductors – Mostly FeSe & FeTe |

752 | Angle Resolved Photoemission Measurements of Metastable Single Crystals of Tetragonal CoSe | Parzyck, Christopher; Zhou, Xiuquan; Wilfong, Brandon; Rodriguez, Efrain; Shen, Kyle | Here, we present synchrotron angle resolved photoemission (ARPES) measurements of these metastable crystals and compare to recent ARPES measurements of MBE synthesized thin films 3 as well as density functional theory calculations 4. | Session 55: Fe-Based Superconductors – Mostly FeSe & FeTe |

753 | Dynamical Magnetism and Orbital Selective Physics in 11 Iron Chalcogenides | Zaliznyak, Igor; Li, Yangmu; Savici, Andrei; Garlea, Vasile; Xu, Zhijun; Gu, Genda; Tranquada, John | Here, we present polarized neutron scattering studies of magnetic dynamics in FeTe parent material and FeTe 0.45Se 0.55 optimally doped superconductor, where we analyze the wave vector dependence of the magnetic form factor in order to understand the orbital state of magnetic electrons. | Session 55: Fe-Based Superconductors – Mostly FeSe & FeTe |

754 | Quantum Monte Carlo calculations of dynamic spin excitations in FeSe | Karakuzu, Seher; Pelliciari, Jonathan; Comin, Riccardo; Johnston, Steven; Maier, Thomas | Here we discuss unbiased dynamical cluster approximation (DCA) quantum Monte Carlo calculations to understand the physics of these compounds. | Session 55: Fe-Based Superconductors – Mostly FeSe & FeTe |

755 | Resistivity, magnetotransport and superconductivity across the nematic quantum critical point in the iron chalcogenides | Hussey, Nigel | Resistivity, magnetotransport and superconductivity across the nematic quantum critical point in the iron chalcogenides | Session 55: Fe-Based Superconductors – Mostly FeSe & FeTe |

756 | Effects of Strong Correlations in the Lattice Dynamics of Iron-based Superconductors | Khanal, Ghanashyam; Haule, Kristjan | In this work, we present an very good agreement with the experiment to calculated values of internal parameters, phonon density of states and the phonon frequencies at high symmetry points. | Session 55: Fe-Based Superconductors – Mostly FeSe & FeTe |

757 | Thickness dependence of band structure of FeSe | Shi, Jia; Le, Duy; Rahman, Talat; Gu, Qiang | We discuss the details of the electronic structure and comparison of the Fermi surfaces and phonon spectra of the thin films to shed light on the high T c behavior of monolayer FeSe. | Session 55: Fe-Based Superconductors – Mostly FeSe & FeTe |

758 | Chemical pressure effect of electron-doped FeSe films | Shikama, Naoki; Sakishita, Yuki; Nabeshima, Fuyuki; Maeda, Atsutaka | Chemical pressure effect of electron-doped FeSe films | Session 55: Fe-Based Superconductors – Mostly FeSe & FeTe |

759 | MBE preparation and in-situ characterization of FeTe thin fims | Mota Pereira, Vanda; Wu, Chi-Nan; Liu, Cheng-En; Liao, Sheng-Chieh; Chang, Chun-Fu; Kuo, Chang-Yang; Koz, Cevriye; Schwarz, Ulrich; Lin, Hong-Ji; Chen, Chien-Te; Tjeng, Liu; Altendorf, Simone | We found that epitaxial layer-by-layer growth is possible for a wide range of excess Fe values, wider than expected from what is known from studies on the bulk material. | Session 55: Fe-Based Superconductors – Mostly FeSe & FeTe |

760 | Influence of iron vacancies on the transport properties of (Fe-Ni)Te0.65Se0.35 crystals | Cieplak, Marta; Zaytseva, Iryna; Kosyl, Katarzyna; Paszkowicz, Wojciech; Gawryluk, Dariusz | Influence of iron vacancies on the transport properties of (Fe-Ni)Te0.65Se0.35 crystals | Session 55: Fe-Based Superconductors – Mostly FeSe & FeTe |

761 | Specific Heat and Critical Behavior in BaFe2(As1-xPx)2 | Moir, Camilla; Riggs, Scott; Galvis, Jose; Giraldo-Gallo, Paula; Chu, Jiun-Haw; Walmsley, Philip; Fisher, Ian; Shekhter, Arkady; Boebinger, Gregory | By applying magnetic fields up to 35 T, we are able to suppress superconductivity and reveal the normal state of overdoped BaFe 2(As 1-xP x) 2. | Session 56: Fe-Based Superconductors – Nematicity |

762 | Quantum critical nematic fluctuations and spin excitation anisotropy in the iron pnictides* | Liu, Chia-Chuan; Abrahams, Elihu; Si, Qimiao | We start from an effective Ginzburg-Landau theory for both the Ising-nematic and antiferromagnetic fluctuations in the presence of a small external uniaxial potential, which breaks the C4-symmetry in B1 g channel, and establish an identity that connects the spin excitation anisotropy with the dynamical magnetic susceptibility and static nematic susceptibility. | Session 56: Fe-Based Superconductors – Nematicity |

763 | Quantum phase transition of correlated iron-based superconductivity in LiFe1-xCoxAs | Shumiya, Nana; Yin, Jiaxin; Zhang, Songtian Sonia; Dai, Guangyang; Zhao, Yuanyuan; Kreisel, Andreas; Macam, Gennevieve; Andersen, Brian; Chuang, Feng-chuan; Lin, Hsin; Wang, Ziqiang; Jin, Changqing; Bang, Yunkyu; Hasan, Zahid | We use scanning tunneling microscopy (STM) to image the electronic impact of Co atoms on the ground state of the LiFe 1-xCo xAs system. | Session 56: Fe-Based Superconductors – Nematicity |

764 | Nematic and Antiferromagnetic Quantum Criticality in a Multi-Orbital Hubbard Model for Iron Pnictides | Chen, Lei; Hu, Wenjun; Hu, Haoyu; Yu, Rong; Lai, Hsin-Hua; Tocchio, Luca Fausto; Becca, Federico; Si, Qimiao | Here [3] we study this problem within a multi-orbital Hubbard model containing both the Hubbard and Hund’s interactions, by a variational Monte Carlo method based on Jastrow-Slater wave functions that allow for a non-perturbative treatment of the electron correlations. | Session 56: Fe-Based Superconductors – Nematicity |

765 | Fluctuating orders induced non-Fermi-liquid behavior near quantum critical point in iron-based superconductors | Li, Rong; She, Zhen-Su | Recently, we have proposed a novel transport theory quantifying scattering by multi-order fluctuations, yielding a new resistivity model, i.e., ρ=ρa+(ρb2+α2T2+β2B2)1/2(see also another contributed talk, She and Li, "A symmetry-breaking analysis for non-Fermi-liquids induced by order fluctuations in correlated electron systems"). | Session 56: Fe-Based Superconductors – Nematicity |

766 | Manifestation of the multiband nature in the BCS-BEC crossover of FeSe1-xSx | Hashimoto, Takahiro; Ota, Yuichi; Tsuzuki, Akihiro; Nagashima, Tsubaki; Fukushima, Akiko; Kasahara, Shigeru; Matsuda, Yuji; Matsuura, Kohei; Mizukami, Yuta; Shibauchi, Takasada; Shin, Shik; Okazaki, Kozo | Here, we provide the first example of complete evidence for the BCS-BEC crossover in an iron-based superconductor FeSe 1-xS x from laser-excited angle-resolved photoemission spectroscopy, and propose a multiband mechanism for BCS-BEC crossover in this system. | Session 56: Fe-Based Superconductors – Nematicity |

767 | Unusual BCS-BEC crossover in FeSe1-xSx superconductors | Mizukami, Yuta; Haze, Masahiro; Tanaka, Ohei; Matsuura, Kohei; Sano, Daiki; Böker, Jakob; Eremin, Ilya; Kasahara, Shigeru; Matsuda, Yuji; Shibauchi, Takasada | Here we report on high resolution heat capacity, magnetic torque, and scanning tunneling spectroscopy measurements in FeSe 1-xS x. | Session 56: Fe-Based Superconductors – Nematicity |

768 | FeSe as a Polymorphous Network | Wang, Zhi; Zhao, Xingang; Billinge, Simon J; Zunger, Alex | FeSe as a Polymorphous Network | Session 56: Fe-Based Superconductors – Nematicity |

769 | Theoretical study on the iron-based two-leg ladder tellurides | Zhang, Yang; Lin, Ling-fang; Moreo, Adriana; Dong, Shuai; Dagotto, Elbio | In the Te-based studies, electrons are more localized than in S, implying that the degree of electronic correlation is enhanced for the Te case. | Session 56: Fe-Based Superconductors – Nematicity |

770 | Substitution and doping in iron pnictides | Schuppler, Stefan; Nagel, Peter; Huang, Meng-Jie; Eder, Robert; Wolf, Thomas; Merz, Michael | For insight into the composition-dependent electronic structure of iron pnictides, we performed a systematic study of spatial structure and electronic states by x-ray diffraction and x-ray absorption. | Session 56: Fe-Based Superconductors – Nematicity |

771 | Isovalent S and Te substitution effect on superconductivity in FeSe thin films | Nabeshima, Fuyuki; Ishikawa, Tomoya; Shikama, Naoki; Sakishita, Yuki; Nakamura, Sota; Kurokawa, Hodaka; Maeda, Atsutaka | We investigated chemical pressure effects from positive to negative (S and Te substitution) and in-plane strain effect from tensile to compressive on physical properties in FeSe thin films. | Session 56: Fe-Based Superconductors – Nematicity |

772 | Resistivity and Magnetic Susceptibility Under Pressure (0–2.0 GPa) of Fe1+εTe0.5Se0.5 and R1-xCexNiO3 [R = (La,Y), Pr]* | Kuklinski, Zachary; Ponti, Gregorio; Timmers, Quinn D. B.; Husain, Rabia; Markert, John | We report measurements of the ac magnetic susceptibility of the iron-based mixed-chalcogenide superconductor Fe 1+εTe 0.5Se 0.5, and of the electrical resistivity of doped nickel-oxide compounds R 1-xCe xNiO 3, with R = Pr or (La,Y), over the pressure range 0–20 kbar (0–2.0 GPa). | Session 56: Fe-Based Superconductors – Nematicity |

773 | Unconventional quantum criticality in a two-dimensional fermion-boson coupled system | Liu, Jianqiao; Shindou, Ryuichi | We study a two-dimensional two-band Fermi system with finite Fermi surfaces that couples with a $phi^4$ action of O(3) vector boson field with dynamical exponent $z=1$ through Yukawa-type coupling. | Session 56: Fe-Based Superconductors – Nematicity |

774 | Effect of pressure on the competing phases in FeSe and BaFe2As2: Insights from specific heat measurements and beyond | Gati, Elena; Xiang, Li; Bud’ko, Sergey; Canfield, Paul | In this talk, we focus on new insights into the phase interplay under pressure of two members, FeSe and BaFe 2As 2, from specific heat under pressures [1] up to ~ 2.5 GPa. | Session 56: Fe-Based Superconductors – Nematicity |

775 | Electronic phase diagram of FeSe1-xTex under high pressure | Mukasa, Kiyotaka; Matsuura, Kohei; Sugimura, Yuichi; Otani, Muku; Qiu, Mingwei; Saito, Mikihiko; Mizukami, Yuta; Hashimoto, Kenichiro; Gouchi, Jun; Uwatoko, Yoshiya; Shibauchi, Takasada | In this study, we focus on FeSe 1-xTe x in which selenium is substituted by tellurium. | Session 56: Fe-Based Superconductors – Nematicity |

776 | Multiple Magnetic Phases Hiding in Plain (and Out-of-Plane) Sight in Coexistence with Superconductivity in LaFeAs1-xPxO 1111 System | Stadel, Ryan; Khalyavin, Dmitry; Manuel, Pascal; Fernandes, Rafael; Christensen, Morten Holm; Taddei, Keith; Dela Cruz, Clarina; Huq, Ashfia; Lapidus, Saul; Phelan, Daniel; Chung, Duck Young; Krogstad, Matthew; Osborn, Raymond; Rosenkranz, Stephan; Chmaissem, Omar | We present a detailed phase diagram with nuclear and magnetic structural characterization based on a combination of x-ray and neutron diffraction, as well as magnetic temperature dependence thoroughly mapped by muon spin resonance. | Session 56: Fe-Based Superconductors – Nematicity |

777 | Wang-Landau simulations of the coupled magnetic and nematic transitions in disordered iron-based superconductors | Chakraborty, Anzumaan; Meese, William; Fernandes, Rafael; Vojta, Thomas | Here we perform Monte Carlo simulations of an appealing model that captures these two transitions, namely, the 2D anisotropic Ising-O(3) model. | Session 56: Fe-Based Superconductors – Nematicity |

778 | Coexistence of long-range magnetic ordering and superconductivity in FeSe/EuTiO3 heterostructure | Liu, Chong; Shin, Hyungki; Roemer, Ryan; Zou, Ke | Our work provides a new platform for the interplay of spins and superconductivity, which may promote integration of superconductors in new spintronics. | Session 56: Fe-Based Superconductors – Nematicity |

779 | Quasi-elastic scattering from short-range magnetic order in FeTe1-xSex compounds | Xu, Guangyong; Xu, Zhijun; Gu, Genda; Tranquada, John; Birgeneau, Robert | We report neutron scattering measurements on single crystals of FeTe 1-xSe x. Superconductivity (SC) and antiferromagnetic (AFM) order in these compounds can be tuned together by varying Se compositions and/or excess Fe. | Session 56: Fe-Based Superconductors – Nematicity |

780 | Elastoresistance of CaK(Fe,Ni)4As4 | Boehmer, Anna; Meier, William; Xu, Mingyu; Drachuck, Gil; Wiecki, Paul; Bud’ko, Sergey L.; Meingast, Christoph; Chen, Fei; Christensen, Morten Holm; Fernandes, Rafael; Canfield, Paul | Here, we have determined the elastoresistance of CaK(Fe 1-xNi x) 4As 4 ( x=0-0.05), spanning the phase diagram from a superconducting sample with Tc=35 K and no magnetic order, to a sample with magnetic order at a high TN=51 K having Tc=10 K. | Session 56: Fe-Based Superconductors – Nematicity |

781 | Prediction of Antiferromagnetism in Chromium Analog (BaCr2P2) of Iron Pnictide Confirmed by Synthesis | Jishi, Radi; Rodriguez, Jose; Haugan, Timothy; Susner, Michael | We have performed density-functional theory (DFT) calculations for BaCr 2P 2. | Session 56: Fe-Based Superconductors – Nematicity |

782 | Novel Fe-based superconductor LaFe2As2 in comparison with traditional pnictides | Mazin, Igor; Jeschke, Harald; Shimizu, Makoto; Takemori, Nayuta | We show that the difference between them has nonetheless magnetic origin, the one featuring disordered moments, and the other locally nonmagnetic. | Session 56: Fe-Based Superconductors – Nematicity |

783 | Biaxial Strain Tuning of Strong Electronic Correlations in CsFe2As2 | Wiecki, Paul; Haghighirad, Amir-Abbas; Wolf, Thomas; Boehmer, Anna | In this contribution, using transport and x-ray diffraction measurements, we demonstrate that in-plane biaxial tension strain, applied by gluing the sample to a rigid substrate with a large mismatch in thermal expansivity, can modify the low-temperature electronic correlations as well as the coherence-incoherence crossover temperature in this material. | Session 56: Fe-Based Superconductors – Nematicity |

784 | Emergent electronic properties of FeTe by strain tuning | Panja, Soumendra; Topping, Craig; Yim, Chi Ming; Trainer, Christopher; Croitori, Dorina; Tsurkan, Vladimi; Loidl, Alois; Wahl, Peter; Rost, Andreas | In our research programme we explore the magnetic and superconducting phase diagram under uniaxial strain along [110]. | Session 56: Fe-Based Superconductors – Nematicity |

785 | Unconventional charge density wave order in the pnictide superconductors Ba(Ni1-xCox)2As2 and Ba1-xSrxNi2As2 | Lee, Sangjun; Sun, Xiaolan; Guo, Xuefei; Collini, John; Eckberg, Chris; Paglione, Johnpierre; Abbamonte, Peter | Using x-ray scattering, we present the discovery of CDW order in BaNi 2As 2 and its evolution upon Co and Sr doping. | Session 56: Fe-Based Superconductors – Nematicity |

786 | Emergence of Fulde-Ferrell-Larkin-Ovchinnikov phase in FeSe in the BCS-BEC crossover | Kasahara, Shigeru; Sato, Yuki; Licciardello, Salvatore; Čulo, Matija; Arsenijevic, Stevan; Ottenbros, Thom; Tominaga, Takahito; Böker, Jakob; Eremin, Ilya; Wosnitza, Joachim; Shibauchi, Takasada; Hussey, Nigel; Matsuda, Yuji | Here, via thermal transport measurements in intense magnetic fields up to 33 T, we present compelling evidence for a distinct high-field superconducting phase in an iron-chalcogenide superconductor FeSe for the field H || ab-plane. | Session 56: Fe-Based Superconductors – Nematicity |

787 | Electronic Nematicity in FeSe | Yi, Ming | Here we report a detailed study of the electronic structure of fully detwnned FeSe across the nematic phase transition using angle-resolved photoemission spectroscopy. | Session 56: Fe-Based Superconductors – Nematicity |

788 | Evolution of soft phonons in FeSe under pressure | Merritt, Adrian; Weber, Frank; Boehmer, Anna; Sen, Kaushik; Castellan, John-Paul; Wolf, Thomas; Souliou, Sofia; Alatas, Ahmet; Said, Ayman; Bi, Wenli; Fernandes, Rafael; Reznik, Dmitry | Here we present IXS measurements of TA phonon dispersion from which we can extract the nematic correlation length. | Session 56: Fe-Based Superconductors – Nematicity |

789 | Observation of intra-unit-cell nematic order in epitaxial bilayer FeSe films on SrTiO3(001) | Zhang, Huimin; Ge, Zhuozhi; Zou, Qiang; Weinert, Michael; Li, Lian | Here, we systematically investigate the nematic order in high quality bilayer FeSe/SrTiO 3 films grown by molecular beam epitaxy. | Session 56: Fe-Based Superconductors – Nematicity |

790 | Phonon spectroscopy in FeSe using high-resolution inelastic x-ray scattering | Murai, Naoki; Fukuda, Tatsuo; Nakajima, Masamichi; Kawamura, Mitsuaki; Ishikawa, Daisuke; Tajima, Setsuko; Baron, Alfred | Comparing the experimental phonon dispersion with density functional theory (DFT) calculations in the non-magnetic state, we found a significant disagreement between them. | Session 56: Fe-Based Superconductors – Nematicity |

791 | Room temperature local nematicity in FeSe superconductor | Koch, Robert; Konstantinova, Tatiana; Abeykoon, Milinda; Wang, Aifeng; Petrovic, Cedomir; Zhu, Yimei; Bozin, Emil; Billinge, Simon J | We report pair distribution function measurements of the iron-based superconductor FeSe above and below the structural transition temperature. | Session 56: Fe-Based Superconductors – Nematicity |

792 | Observation of layer-dependent dxz/dyz band splittings in the nematic phase of FeSe/SrTiO3 films | Peng, Xiliang; Jiang, Kun; Wu, Xianxin; Yuan, Yonghao; Huang, Yaobo; Qian, Tian; Li, Wei; Hu, Jiangping; Wang, Ziqiang; Sun, Yujie; Ding, Hong | Our layer-dependent experiments provide limitations for the theoretical study of the nematic phase in FeSe and shed insights for the study of the interplay between nematicity and superconductivity. | Session 56: Fe-Based Superconductors – Nematicity |

793 | Nematicity from spin correlations in iron-based superconductors | Yu, Rong; Wang, Yiming; Hu, Wenjun; Si, Qimiao | We show, based on a symmetry analysis, that the spin correlations in the system allow for a variety of nematic orders, in particular an unusual B2g nematicity. | Session 56: Fe-Based Superconductors – Nematicity |

794 | Spin nematicity in the local-moment Fe-chalcogenide KFe0.8Ag1.2Te2 | Song, Yu | In semiconducting KFe 0.8Ag 1.2Te 2, an analogue of the archetypical iron pnictide BaFe 2As 2, we found simultaneous stripe-type magnetic order and nematic order below T S,N=35 K, with striking similarities between the two systems. | Session 56: Fe-Based Superconductors – Nematicity |

795 | Exploring the electronic structure of BaFe2As2 using resonant Raman scattering | Hackl, Rudolf; Baum, Andreas; Li, Ying; Lazarevic, Nenad; Jost, Daniel; Chu, Jiun-Haw; Fisher, Ian; Valenti, Roser; Mazin, Igor | In this study we present light scattering data on twin-free BaFe 2As 2 as a function of the energy of the incident photons. | Session 56: Fe-Based Superconductors – Nematicity |

796 | Hidden antiferro-nematic order in BaFe2As2 and NaFeAs above TS | Onari, Seiichiro; Kontani, Hiroshi | To explain this long-standing mystery, we propose the emergence of antiferro-bond order with antiferro wavevector q=(0,π) at T*, by solving the linearized density-wave equation based on the vertex correction theory [3,4]. | Session 56: Fe-Based Superconductors – Nematicity |

797 | Quantum Critical Enhancement of Nematic-Resistivity Anisotropy in Underdoped Ba(Fe1-xCox)2As2 | Sanchez, Shua; Malinowski, Paul; Kim, Jong Woo; Ryan, Philip; Chu, Jiun-Haw | Using this relation, we discovered that this proportional constant increases significantly as doping approaches optimal, indicating the enhanced coupling between nematicity and conducting electrons near the quantum critical point. | Session 56: Fe-Based Superconductors – Nematicity |

798 | Non-linear elasto-Hall measurements in iron-based superconductors | Malinowski, Paul; Jiang, Qianni; Liu, Zhaoyu; Shi, Yue; Sanchez, Shua; Chu, Jiun-Haw | In this work, we present the observation of the non-linear elasto-Hall effect in Co doped and P doped BaFe2As2. | Session 56: Fe-Based Superconductors – Nematicity |

799 | Investigation of neamtic phase in LaFeAsO | Huh, Soonsang; Kim, Younsik; Kyung, Wonshik; Jung, Jongkeun; Aswartham, Saicharan; Buechner, Bernd; Dong, Chengxiao; Hu, Jiangping; Cho, Soohyun; Shen, Dawei; Denlinger, Jonathan; Kim, Changyoung | We report temperature dependent band splitting behavior between d xz and d yz hole band near Γ and M point | Session 56: Fe-Based Superconductors – Nematicity |

800 | A local structure perspective on iron pnictides and chalcogenides: Insights gained from pair distribution function analysis | Frandsen, Benjamin | Here, I will present recent PDF investigations of several representative families of iron-based superconductors. | Session 57: Fe-Based Superconductors – Nematicity III / ARPES |

801 | Time Reversal Symmetry Breaking in the FeTe1-xSex family of high Tc superconductors. | Johnson, Peter | Here the technique is used to examine the Fe-based superconductor family, FeTe 1-xSe x. | Session 57: Fe-Based Superconductors – Nematicity III / ARPES |

802 | Orbital transmutation in the nematic state of FeSe: the consequences for Raman and ARPES experiments | Chubukov, Andrey; Udina, Mattia; Grilli, Marco; Benfatto, Lara; Christensen, Morten Holm; Fernandes, Rafael | In this talk I will discuss nematicityinduced change of the orbital composition of low-energy excitations in FeSe, and how it affects Raman and ARPES probes. | Session 57: Fe-Based Superconductors – Nematicity III / ARPES |

803 | Time-reversal symmetry-breaking superconductivity in FeSe1-xSx | Qiu, Mingwei; Matsuura, Kohei; Takenaka, Takaaki; Sugimura, Yuichi; Shibauchi, Takasada; Sheng, Qi; Yamakawa, Kohtaro; Uemura, Yasutomo; Cai, Yipeng; Damascelli, Andrea; Day, Ryan; Kojima, Kenji; Beare, James; Luke, Graeme; Qiang, Zhao; Jin, Changqing; Gu, Yilun; Fu, LiCheng; Ning, Fanlong; Saito, Mikihiko | We have performed the muon spin rotation (μSR) measurements on FeSe and observed the spontaneous internal field below the superconducting transition temperature T c, providing evidence for TRSB state in FeSe. | Session 57: Fe-Based Superconductors – Nematicity III / ARPES |

804 | An ARPES and STM/S investigation of the interplay between nematicity, orbital order, and superconductivity in FeSe | Walker, Morgan; Boyle, Timothy; Zhao, Zitong; Da Silva Neto, Eduardo; Byland, Journey; Badger, Jackson; Taufour, Valentin; Day, Ryan; Zhdanovich, Sergey; Damascelli, Andrea; Pedersen, Tor; Gorovikov, Sergey | We performed detailed scanning tunneling microscopy and spectroscopy (STM/S) and angle-resolved photoemission spectroscopy (ARPES) studies on single crystals of FeSe to investigate the interplay between nematicity, orbital order and superconductivity. | Session 57: Fe-Based Superconductors – Nematicity III / ARPES |

805 | Nematicity studied with strain-dependent ARPES | Pfau, Heike; Chen, Su-Di; Yi, Ming; Hashimoto, Makoto; Rotundu, Costel; Palmstrom, Johanna; Chen, Tong; Dai, Peng-Cheng; Straquadine, Joshua; Hristov, Alexander; Birgeneau, Robert; Lu, Donghui; Fisher, Ian; Shen, Zhixun | Nematicity studied with strain-dependent ARPES | Session 57: Fe-Based Superconductors – Nematicity III / ARPES |

806 | Unprecedented Optical Anisotropy in Optimally Doped Iron-Based Superconductor | Degiorgi, Leonardo; Pal, Anirban; Chinotti, Manuel | Here, we offer a comprehensive optical investigation [1] of the optimally hole-doped Ba 0.6K 0.4Fe 2As 2 over a broad spectral range, as a function of temperature and of tunable applied stress, which acts as an external symmetry breaking field. | Session 57: Fe-Based Superconductors – Nematicity III / ARPES |

807 | Strain effects in Fe-based superconductors: Nematicity, exotic magnetism and superelasticity | Valenti, Roser; Borisov, Vladislav; Zantout, Karim; Biswas, Sananda; Winter, Stephen | In this talk we will analyze the role of strain in some families of Fe-based superconductors. | Session 57: Fe-Based Superconductors – Nematicity III / ARPES |

808 | Bilayer Spliting and Unusual Superconducting Gap in KCa2Fe4As4F2 Superconductor with Double Fe2As2 Layers | Wu, Dingsong; Hong, Wenshan; Dong, Chengxiao; Hu, Jiangping; Li, Shiliang; Luo, Huiqian; Zhao, Lin; Zhou, Xingjiang | We report the first high resolution laser Angle-Resolved Photoemission Spectroscopy(ARPES) measurements on a newly discovered iron based superconductor, KCa 2Fe 4As 4F 2 (K12442) which has the K+-cations connecting double Fe 2As 2 layers separated by the insulating Ca 2F 2 block with a high TC of 34 K at stoichiometric composition. | Session 57: Fe-Based Superconductors – Nematicity III / ARPES |

809 | Pairing symmetry and capping layer influence of the superconductivity at FeSe/SrTiO3 interface | Li, Yanan; Pillsbury, Timothy; Smith, Grant; Vincent, Erzsebet; Richardella, Anthony; Awschalom, David; Samarth, Nitin | Here, we report the synthesis and characterization of ultrathin FeSe films grown on SrTiO 3 by molecular beam epitaxy. | Session 57: Fe-Based Superconductors – Nematicity III / ARPES |

810 | Transport properties and flux pinning analysis of high-performance FeAs122 superconducting wires | Ma, Yanwei | Herein we compared the T c and J c distributions of the K-doped FeAs122 tapes by a calorimetric method. | Session 58: Fe-Based Superconductors – Vortex Properties / Magnetic Superconductors |

811 | Superconducting phase diagram of Ni-doped magnetically ordered superconductor RbEu(Fe1-xNix)4As4 for x ≤ 0.04 in pulsed fields up to 65 T | Smylie, Matthew; Willa, Kristin; Simsek, Yilmaz; Bao, Jinke; Hebbeker, Hendrik; Kwok, Wai-Kwong; Chung, Duck Young; Kanatzidis, Mercouri; Singleton, John; Balakirev, Fedor; Welp, Ulrich | The superconducting phase diagram of single-crystal RbEu(Fe 1-xNi x) 4As 4 for x = 0.02, 0.03, 0.04 has been measured in pulsed magnetic fields up to 65 T using a proximity diode oscillator technique. | Session 58: Fe-Based Superconductors – Vortex Properties / Magnetic Superconductors |

812 | Modification of the Upper Critical Field of RbEuFe4As4 due to Eu-Magnetism | Welp, Ulrich; Koshelev, Alexei; Willa, Roland; Burns, Clement; Cook, Matthew; Bao, Jinke; Chung, Duck Young; Kanatzidis, Mercouri; Kwok, Wai-Kwong | Using specific heat measurements in fields up to 14 T, we show that the H c2-line exhibits clear downwards curvature in a temperature range close to T c where Ginzburg-Landau theory applies, amounting to a shift by δT c ~ 0.4 K in 14 T ||c. | Session 58: Fe-Based Superconductors – Vortex Properties / Magnetic Superconductors |

813 | Angular dependent studies of vortex pinning and dynamics in RbEuFe4As4 single crystals with columnar defects | Nekrashevich, Ivan; Smylie, Matthew; Welp, Ulrich; Kwok, Wai-Kwong; Koshelev, Alexei; Bao, Jin-Ke; Chung, Duck Young; Kanatzidis, Mercouri; Civale, Leonardo | We developed a model to account for the modifications to the vortex critical state produced by the magnetic moments. | Session 58: Fe-Based Superconductors – Vortex Properties / Magnetic Superconductors |

814 | Fermi Surface Folding and Surface Reconstruction in an Iron-Based Superconductor CaKFe4As4 | Cai, Yongqing; Yang, Huan; Xie, Tao; Li, Cong; Xu, Yu; Wu, Dingsong; Liu, Guodong; Luo, Huiqian; Gao, H.-J.; Zhao, Lin; Zhou, Xingjiang | We found three hole-like pockets at the Brillouin zone center and two electron-like pockets around the Brillouin zone corner. | Session 58: Fe-Based Superconductors – Vortex Properties / Magnetic Superconductors |

815 | Scattering studies of the nature of long-range magnetic order coexisting with superconductivity in single-crystal RbEuFe4As4 | Islam, Zahirul; Chmaissem, Omar; Welp, Ulrich; Kim, Jong Woo; Cao, Huibo; Koshelev, Alexei; Willa, Kristin; Smylie, Matthew; Diao, Zhu; Rydh, Andreas; Bao, Jinke; Chung, Duck Young; Kanatzidis, Mercouri; Kwok, Wai-Kwong; Rosenkranz, Stephan | We present magnetic long-range order studied by x-ray scattering and magnetic neutron diffraction (MND) on a single crystal RbEuFe 4As 4 (RbEu1144) suerpconductor. | Session 58: Fe-Based Superconductors – Vortex Properties / Magnetic Superconductors |

816 | Mechanism of helical interlayer magnetic structure in RbEuFe4As4 | Koshelev, Alexei | Motivated by the discovery of helical magnetic structure in RbEuFe 4As 4 [1], we study interlayer ordering of magnetic moments in a material composed of spatially-separated superconducting and ferromagnetic layers [2]. | Session 58: Fe-Based Superconductors – Vortex Properties / Magnetic Superconductors |

817 | Competition between spin-vortex crystal and superconductivity in Ni-doped CaKFe4As4 | Kreyssig, Andreas; Wilde, John; Böhmer, Anna E.; Tian, Wei; Meier, William; Li, Bing; Ueland, Benjamin G.; Xu, Mingyu; Bud’ko, Sergey L.; Canfield, Paul; McQueeney, Robert; Goldman, Alan I. | Employing neutron diffraction we determined that the AFM order is a non-collinear, commensurate structure with a hedgehog spin-vortex crystal (SVC) arrangement in the Fe planes and a simple AFM stacking perpendicular to them. | Session 58: Fe-Based Superconductors – Vortex Properties / Magnetic Superconductors |

818 | Magnetic susceptibility of realistic superconducting samples | Prozorov, Ruslan; Tanatar, Makariy; Nusran, Naufer; Cho, Kyuil; Joshi, Kamal; Ghimire, Sunil | Magnetic susceptibility of realistic superconducting samples | Session 58: Fe-Based Superconductors – Vortex Properties / Magnetic Superconductors |

819 | Cooperative response of the magnetic and superconducting subsystems in magnetic superconductor RbEuFe4As4 | Vlasko-Vlasov, Vitalii; Welp, Ulrich; Koshelev, Alexei; Smylie, Matthew; Bao, Jinke; Chung, Duck Young; Kanatzidis, Mercouri; Kwok, Wai-Kwong | We present magneto-optics and magnetization based studies of the magnetic flux evolution in single crystals of the magnetic superconductor RbEuFe4As4 during field cooling and warming, and magnetic field cycling at temperatures above and below the magnetic transition point, Tm. | Session 58: Fe-Based Superconductors – Vortex Properties / Magnetic Superconductors |

820 | Temperature dependent resistivity in hole-doped Ba1−xKxFe2As2 subject to electron irradiation | Tanatar, Makariy; Liu, Yong; Lograsso, T.; Prozorov, Ruslan; Konczykowski, Marcin; Cavani, Olivie | Temperature dependent resistivity in hole-doped Ba1−xKxFe2As2 subject to electron irradiation | Session 58: Fe-Based Superconductors – Vortex Properties / Magnetic Superconductors |

821 | Strain effect on the superconductivity of FeSe0.5Te0.5 thin films induced by mica substrate | Gao, Ye; Mei, Chenguang; Meng, Miao; Zhang, Xi; Zhao, Yonggang | This work is helpful to understand superconducting mechanism of iron chalcogenide superconductors, and shows a great potential for novel applications with flexible superconductors. | Session 58: Fe-Based Superconductors – Vortex Properties / Magnetic Superconductors |

822 | Spontaneous Nernst Effect in an Iron-based Topological Superconductor Fe1+yTe1-xSex | Chen, Lu; Xiang, Ziji; Tinsman, Colin; Gu, Genda; Li, Lu | We report on a study of Nernst effect in an iron-based superconductor Fe 1+yTe 1-xSe x. | Session 58: Fe-Based Superconductors – Vortex Properties / Magnetic Superconductors |

823 | Time-stable remanence in Dzyaloshinskii-Moriya Interaction driven Weak ferromagnets | Pattanayak, Namrata | We propose that these unique features of remanence explored in systems of different length scales covering bulk single-crystal to nanocrystallites can be taken as the footprint of weak ferromagnetism. | Session 59: Ferromagnetic Order and Instabilities |

824 | Ferromagnetic kinetic exchange interaction | Iwahara, Naoya; Huang, Zhishuo; Mansikkamäki, Akseli; Vieru, Veacheslav; Liu, Dan; Chibotaru, Liviu | Here, we report ferromagnetic kinetic exchange mechanism arising from overlapping of magnetic orbitals and their strong covalency with the bridging orbitals. | Session 59: Ferromagnetic Order and Instabilities |

825 | Small Moment, Itinerant Ferromagnetism Discovered in Single Crystalline La5Co2Ge3 | Saunders, Scott; Xiang, Li; Khasanov, Rustem; Kong, Tai; Lin, Qisheng; Bud’ko, Sergey; Canfield, Paul | Single crystals of monoclinic La 5Co 2Ge 3 were grown using a self-flux method and were characterized by room-temperature powder X-ray diffraction, anisotropic temperature and field dependent magnetization, temperature dependent resistivity, specific heat, and muon spin resonance. | Session 59: Ferromagnetic Order and Instabilities |

826 | Avoided ferromagnetic quantum critical point in pressurized La5Co2Ge3 | Xiang, Li; Saunders, Scott; Bud’ko, Sergey; Canfield, Paul | Lately, we discovered a new ferromagnetic compound, La 5Co 2Ge 3, which has a Curie temperature T c ~ 3.8 K. | Session 59: Ferromagnetic Order and Instabilities |

827 | Effect of Fe and Cr doping on electronic and magnetic properties of Inverse Heusler alloys: Mn2CoCrxGa(1-x) and Mn2CoFexGa (1-x) | Kaphle, Gopi Chandra; Dhakal, Ramesh; Nepal, sashi; Ray, Ram | We have investigated the effect of electronic and magnetic properties on Mn 2CoGa after doping Fe and Cr. | Session 59: Ferromagnetic Order and Instabilities |

828 | Small angle neutron scattering study of magnetic length scales in disordered ferromagnetic Ni-V alloys. | Bhattarai, Shiva; Adawi, Hind; Lussier, Jean Guy; Schroeder, Almut; Krycka, Kathryn | We used small angle neutron scattering (SANS) to reveal magnetic microstructures in a disordered ferromagnet (FM) close to quantum critical point (QCP) where long range order is suppressed with critical temperatures Tc approaching zero. | Session 59: Ferromagnetic Order and Instabilities |

829 | Unveiling electronic correlation and ferromagnetic superexchange mechanism in van der Waals crystal CrSiTe3 | Zhang, Jiaxin; Cai, Xiaochan; Yang, Lexian; Yuan, Hongtao; Chen, Yulin; Zhang, Shilei; Liu, Zhongkai; Li, Gang | By combining advanced many-body calculations with angle-resolved photoemission spectroscopy we investigate CrSiTe 3 single crystals and unveil the pivotal role played by the strong electronic correlations at both high- and low-temperature regime. | Session 59: Ferromagnetic Order and Instabilities |

830 | Existence of ferromagnetism in a two-dimensional two species bosonic Hubbard model with the presence of confinement | Hettiarachchilage, Kalani; Rousseau, V. G.; Tam, Ka-Ming; Jarrell, Mark; Moreno, Juana | We investigate a two-dimensional bosonic Hubbard model with two species in the presence of a harmonic trapping potential. | Session 59: Ferromagnetic Order and Instabilities |

831 | Z3 ferromagnet to Valence Bond Solid transition in 1d | Roberts, Brenden; Jiang, Shenghan; Motrunich, Olexei | In this work we focus on the transition between Z3 ferromagnet and Valence Bond Solid (VBS) in a 1d chain with a Z3xZ3 global symmetry. | Session 59: Ferromagnetic Order and Instabilities |

832 | Physical properties of the van der Waals material Fe5GeTe2 | May, Andrew; Ovchinnikov, Dmitry; Zheng, Qiang; Hermann, Raphael; Calder, Stuart; Bridges, Craig; Xu, Xiaodong; McGuire, Michael | This presentation will discuss the physical properties of Fe 5-xGeTe 2 single crystals, with an emphasis on the metastable nature of the compound and how magnetism on one Fe sublattice dominates the transport properties. | Session 59: Ferromagnetic Order and Instabilities |

833 | The effect of Ge substitution on optical properties of FeGa3 single crystals | Poudel, Aashish; Sydoryk, Ihor; Martin, Rodica; Petrovic, Cedomir; Weijun, Ren; Martin, Catalin | Here we present optical reflectance measurements on single crystals of FeGa 3−xGe x, for different values of x. | Session 59: Ferromagnetic Order and Instabilities |

834 | Intrinsically weak magnetic anisotropy of cerium in potential hard-magnetic intermetallics | Galler, Anna; Biermann, Silke; Pourovskii, Leonid | We study the magnetic properties of the "1-12" family of prospective hard-magnetic Ce-Fe intermetallics using an ab initio dynamical mean-field theory approach to treat the complex many-electron physics of the Ce 4f 1 shell. | Session 59: Ferromagnetic Order and Instabilities |

835 | Thickness-dependent magnetic order in CrI3 single crystals | Liu, Yu; Wu, Lijun; Tong, Xiao; Li, Jun; Tao, Jing; Zhu, Yimei; Petrovic, Cedomir | Here we study detailed evolution of magnetic transition and magnetic critical properties in response to systematic reduction in crystal thickness down to 50 nm. | Session 59: Ferromagnetic Order and Instabilities |

836 | Magnetic-Competition-Induced Colossal Magnetoresistance in n-Type HgCr2Se4 under High Pressure | Sun, Jianping; Jiao, Yuanyuan; Dissanayake, Sachith; Matsuda, Masaaki; Uwatoko, Yoshiya; Shi, Youguo; Li, Yongqing; Fang, Zhong; Cheng, Jinguang | Thus, our work provides a means for realizing novel state where the extremely large magnetoresistance can be obtained via switching between two distinct electronic ground states in a single-valent system 2. | Session 59: Ferromagnetic Order and Instabilities |

837 | Electronic band structures of FeGe driven by thermal-fluctuation | Xu, Yang; Gong, Zizhao; Sun, Rui; na, li; Zhang, Xiangqun; He, Wei; Cheng, Zhaohua | Electronic band structures of FeGe driven by thermal-fluctuation | Session 59: Ferromagnetic Order and Instabilities |

838 | First principles study of defect properties of II-VI photovoltaic materials | Wei, Suhuai | In this talk, using II-V thin-film solar cell absorber materials Cd(Te,Se), Cu(In,Ga)Se 2 (CIGS) and Cu 2ZnSnS2 (CZTS) as examples, I will discuss how theoretical first-principles studies can be used to better understand and optimize the solar cell performance. | Session 60: First Principles Approaches to Defects |

839 | First-Principles Study on the Defect Physics of Ternary Chalcopyrite ZnGeP2 through Hybrid Functional | Huang, Menglin; Wang, Shanshan; Chen, Shiyou | Here we study the defect physics in ZnGeP 2 using the density functional theory (DFT) calculations with a hybrid functional. | Session 60: First Principles Approaches to Defects |

840 | Dimensionality-suppressed chemical doping in 2D semiconductors: the cases of phosphorene, MoS2, and ReS2 from first-principles | Yang, Ji-Hui | Here by decomposing the defect IEs into the neutral single-electron defect level, the structural relaxation energy gain, and the electronic relaxation energy cost, we propose a conceptual picture that the large defect IEs are caused by two effects of reduced dimensionality. | Session 60: First Principles Approaches to Defects |

841 | First-principles study of defect physics in a photovoltaic semiconductor Cu2ZnGeSe4 | Cai, Lele; Chen, Shiyou | Here we study the intrinsic point defects in Cu 2ZnGeSe 4 using the density functional theory calculations with both the generalized gradient approximation and the hybrid functional. | Session 60: First Principles Approaches to Defects |

842 | First principles calculations of phonons and Raman and infrared spectra in ZnGeGa2N4 . | Ratnaparkhe, Amol; Lambrecht, Walter | Here, a first-principles study of the phonons in this material is presented. | Session 60: First Principles Approaches to Defects |

843 | Energy landscape of vacancy-related defects in silicon: a comprehensive picture from DFT and GW | Herrero-Saboya, Gabriela; Martin-Samos, Layla; Hemeryck, Anne; Richard, Nicolas | They have been the subject of extensive studies both experimental and theoretical. | Session 60: First Principles Approaches to Defects |

844 | Charged Defects in TiO2 Anatase: A Comparative Study of Hybrid DFT, GW and BSE to Explore Optical Properties | Basera, Pooja; Bhattacharya, Saswata | Knowing the most stable defects, we aim an accurate theoretical estimation of the optical properties of doped TiO 2. | Session 60: First Principles Approaches to Defects |

845 | The Barrier to the Small Polaron Formation in Metal Peroxides | Yuan, Shuaishuai; Wang, Zi; Baron, Maximilian; Bevan, Kirk | In this work, we provide ab initio insights into the polaron formation process and focus on exploring the physical origins of the barrier to polaron formation. | Session 60: First Principles Approaches to Defects |

846 | Machine learned defect and impurity levels in perovskite halides and CdTe | Mannodi Kanakkithodi, Arun Kumar; Sen, Fatih; Toriyama, Michael; Davis, Michael; Chan, Maria | In this talk, we will describe using machine learning (ML) trained on DFT data for defect levels in hybrid perovskite halides [1] and CdTe [2] photovoltaic materials. | Session 60: First Principles Approaches to Defects |

847 | Many-body embedding for excited states of Fe in III-nitrides | Dreyer, Cyrus; Muechler, Lukas; Roesner, Malte | Using Fe in GaN and AlN as an example, we address this issue by treating the defect as a correlated subspace embedded in the lattice. | Session 60: First Principles Approaches to Defects |

848 | Monte Carlo Simulations of Non-Linear Evolution of Materials Resistivity | Hancock, Steven; Abate, Yohannes; Landau, David | We employed an experimentally motivated Monte Carlo simulation to calculate the conductance as a function of charged dopant concentration to investigate the non-linear evolution of the resistivity with annealing time in oxygen deficient thin films. | Session 60: First Principles Approaches to Defects |

849 | Formation energies of charged defects in 2D materials – a new perspective | O’Hara, Andrew; Tuttle, Blair; Zhang, Xiaoguang; Pantelides, Sokrates | In this work, we present an alternative formalism based on statistical mechanics, which dictates that supercells are naturally neutral: “charged defects” are merely ionized, by trading carriers with the energy bands (charge neutrality of the crystal is an essential ingredient of the statistical mechanics of electrons in semiconductors). | Session 60: First Principles Approaches to Defects |

850 | Origin of n-type conductivity of monolayer MoS2 | Singh, Akash; Singh, Abhishek | Here, using hybrid density functional theory (DFT), we carried out an extensive study of often observed native point defects i.e., VS , VMo , VS2 , VMoS3 , VMoS6 , MoS2 , and S2Mo and found that none of them cause n-type doping. | Session 60: First Principles Approaches to Defects |

851 | Floquet control of indirect exchange interaction in periodically-driven magnetic lateral heterostructures | Asmar, Mahmoud; Tse, Wang Kong | We present a theory for the RKKY interaction in a monochromatically irradiated magnetic lateral heterostructure (MLH). | Session 61: Floquet and Nonequilibrium Models |

852 | Nonequilibrium susceptibility in photoinduced Floquet states | Ono, Atsushi; Ishihara, Sumio | We investigate the nonequilibrium spin susceptibility in an electron system subject to a time-periodic electric field [1]. | Session 61: Floquet and Nonequilibrium Models |

853 | Promoting spontaneous symmetry breaking through Floquet band engineering | Esin, Iliya; Gupta, Gaurav; Berg, Erez; Rudner, Mark; Lindner, Netanel | The prospect of realizing new correlated states of electrons motivates us to seek methods for engineering band structures exhibiting large densities of states. | Session 61: Floquet and Nonequilibrium Models |

854 | Observation of Floquet prethermalization in dipolar spin chains | Peng, Pai; Yin, Chao; Huang, Xiaoyang; Ramanathan, Chandrasekhar; Cappellaro, Paola | Here we present nuclear magnetic resonance observation of Floquet prethermalization in dipolar spin chains. | Session 61: Floquet and Nonequilibrium Models |

855 | Approaching a Floquet Time Crystal phase in the periodically driven O(N) model | Natsheh, Muath; Gambassi, Andrea; Mitra, Aditi | Employing numerical simulations, and analytic calculations within a large-N approach, we study how an initial paramagnetic phase evolves into the Floquet time crystal phase following a quench. | Session 61: Floquet and Nonequilibrium Models |

856 | Quantum butterfly effect in polarized Floquet systems with conservation laws | Chen, Xiao; Nandkishore, Rahul; Lucas, Andrew | We explore quantum dynamics in Floquet many-body systems with local conservation laws in one spatial dimension, focusing on sectors of the Hilbert space which are highly polarized. | Session 61: Floquet and Nonequilibrium Models |

857 | Floquet Conformal Field Theory | Fan, Ruihua; Gu, Yingfei; Vishwanath, Ashvin; Wen, Xueda | In this talk, we will generalize the original set-up to go beyond the sl(2,R) algebra and also discuss driving a thermal state. | Session 61: Floquet and Nonequilibrium Models |

858 | Positivity of the Spectral Densities of Retarded Floquet Green Functions | Freericks, James; Kalthoff, Mona; Uhrig, Goetz | We derive the general spectral representation of retarded Green functions in the Floquet regime, thereby generalizing the well-known Lehmann representation from equilibrium many-body physics. | Session 61: Floquet and Nonequilibrium Models |

859 | Floquet dynamics under spatially inhomogeneous drive | Huang, Zhoushen; Clerk, Aashish; Martin, Ivar | In this work, we discuss features of Floquet systems under inhomogeneous spatial drives, in the context of band theory, such as nondispersing traveling wave packets, simplification of dynamical Hilbert space, and a machine learning scheme which can predict time dynamics of arbitrary temporal driving profiles. | Session 61: Floquet and Nonequilibrium Models |

860 | Long-lived interacting phases of matter protected by multiple time-translation symmetries in quasiperiodically-driven systems | Else, Dominic; Ho, Wen Wei; Dumitrescu, Philipp | We show how a large family of interacting nonequilibrium phases of matter can arise from the presence of multiple time-translation symmetries, which occur by quasiperiodically driving an isolated quantum many-body system with two or more incommensurate frequencies. | Session 61: Floquet and Nonequilibrium Models |

861 | Non-equilibrium steady state solutions of time-periodic driven Luttinger liquids | Fazzini, Serena; Chudzinski, Piotr; Dauer, Christoph; Schneider, Imke; Eggert, Sebastian | We now study the exact Floquet steady states of the periodically driven Tomonaga-Luttinger liquid without resorting to any high frequency approximations. | Session 61: Floquet and Nonequilibrium Models |

862 | Spontaneously broken discrete time translation symmetry in driven quantum Brownian motion | Chen, Jyong-Hao; Oshikawa, Masaki | In this work, we consider the quintessential model of quantum dissipation — the Caldeira-Leggett model and take into account the presence of a periodically driven external potential. | Session 61: Floquet and Nonequilibrium Models |

863 | Dynamic Control of Metal-Insulator Transitions Out of Equilibrium | Kleinhenz, Joseph; Krivenko, Igor; Cohen, Guy; Gull, Emanuel | We present quench protocols that are able to overcome this difficulty and demonstrate controllable switching across the phase boundary in both directions. | Session 61: Floquet and Nonequilibrium Models |

864 | Photo-induced superconductivity in the Kondo lattice | Shirakawa, Tomonori; Miyakoshi, Shohei; Yunoki, Seiji | Here, we show that the same mechanism can be applied to the Kondo lattice model, an effective model for heavy fermion systems, by demonstrating that the photo-irradiation indeed enhances the eta-pairing correlations. | Session 61: Floquet and Nonequilibrium Models |

865 | Fermionic parity stability and interference measurements of non-Abelian e/4 and Abelian e/2 quasiparticle braiding at 7/2 and 5/2 filling factors | Willett, Robert; Shtengel, Kirill; Nayak, Chetan; Pfeiffer, Loren; Chung, Edwin; Baldwin, K. W.; West, Kenneth | Fermionic parity stability and interference measurements of non-Abelian e/4 and Abelian e/2 quasiparticle braiding at 7/2 and 5/2 filling factors | Session 62: Fractional Excitations in the Quantum Hall Effect |

866 | Non-Abelian braiding statistics via Aharonov–Bohm interferometry | Shtengel, Kirill; Willett, Robert; Nayak, Chetan; Pfeiffer, Loren; Chung, Edwin; Peabody, Milton; Baldwin, K. W.; West, Kenneth | This talk will focus on the theoretical predictions and their comparison with the recent observations [1], arguing that the preponderance of experimental evidence unmistakably points towards the non-Abelian nature of ν=5/2 and 7/2 quantum Hall states and provides strong evidence of non-Ableian braiding. | Session 62: Fractional Excitations in the Quantum Hall Effect |

867 | Contacts and Equilibration in the ν=5/2 Quantum Hall Effect | Asasi, Hamed; Mulligan, Michael | Here we consider various edge-state scenarios which may explain the measured thermal conductance, paying close attention to the role of contacts and edge-state equilibration. | Session 62: Fractional Excitations in the Quantum Hall Effect |

868 | Patterns in paired electron additions to fractional quantum Hall edge states in large GaAs quantum dots | Ashoori, Raymond; Demir, Ahmet; Staley, Neal; Aronson, Samuel; Tomarken, Spencer; Baldwin, K. W.; West, Kenneth; Pfeiffer, Loren | In vertical tunneling into a large and low disorder 2D GaAs quantum dot, we observe electrons entering edge states and an unusual and unpredicted pair tunneling of electrons into the dot’s quantum Hall edge states, with double-height capacitance peaks and a coincident h/2e periodicity in magnetic flux through the dot. | Session 62: Fractional Excitations in the Quantum Hall Effect |

869 | Flux superperiods and periodicity transitions in quantum Hall interferometers | Rosenow, Bernd; Stern, Ady | We show that flux superperiods are possible, and reconcile their appearance with the Byers-Yang theorem. | Session 62: Fractional Excitations in the Quantum Hall Effect |

870 | Probing the photon-assisted processes of anyons of charge e/3 and e/5 in the FQHE regime | Glattli, Christian; Taktak, Imen; Roulleau, Preden | Going beyond these observations we analyze the amplitude of the microwave field propagating from the excited contact to a Quantum Point Contact. | Session 62: Fractional Excitations in the Quantum Hall Effect |

871 | Sublattice resolved spin wave transport through graphene fractional quantum Hall states as a probe of isospin order | Zhou, Haoxin; Polshyn, Hryhoriy; Taniguchi, Takashi; Watanabe, Kenji; Young, Andrea | I will describe nonlocal transport measurements based on launching spin waves from a gate defined lateral heterojunction, performed in ultra-clean Corbino geometry graphene devices. | Session 62: Fractional Excitations in the Quantum Hall Effect |

872 | Microscopic theory of fractional excitations in gapless bilayer quantum Hall states: semi-quantized quantum Hall states | Turker, Oguz; Meng, Tobias | In this talk, I will explain what a semi-quantized quantum Hall state is, and use a coupled-wire construction to predict possible future experiments in the already existing experimental platforms. | Session 62: Fractional Excitations in the Quantum Hall Effect |

873 | Non-linear transport and noise measurements in reentrant integer quantum Hall states | Sun, Jian; Niu, Jiasen; Wang, Pengjie; Liu, Yang; Pfeiffer, Loren; West, Kenneth; Lin, Xi | By increasing the DC bias gradually, we found the insulating phase of RIQH states disappeared, and the depinning trace can be divided into three regions according to different DC bias values. | Session 62: Fractional Excitations in the Quantum Hall Effect |

874 | Edge Mode Engineering and Interferometry in the Quantum Hall Regime | Bhattacharyya, Rajarshi; Heiblum, Mordehai; Mahalu, Diana; Umansky, Vladimir | Here, we have adapted a novel route of engineering edge channels away from the physical boundary in order to minimize edge reconstruction. | Session 62: Fractional Excitations in the Quantum Hall Effect |

875 | Paired Electron Additions to Fractional Quantum Hall Edge States in Large GaAs Quantum Dots | Aronson, Samuel; Demir, Ahmet; Staley, Neal; Tomarken, Spencer; West, Kenneth; Baldwin, K. W.; Pfeiffer, Loren; Ashoori, Raymond | We measure capacitance signals from additions of single electrons to a large (0.8 μm) 2D GaAs quantum dot and thereby determine the energies required to add electrons to the dot. | Session 62: Fractional Excitations in the Quantum Hall Effect |

876 | Fabry-Perot interferometry of fractional quantum Hall edge states | Nakamura, James; Fallahi, Saeed; Sahasrabudhe, Harshad; Liang, Shuang; Gardner, Geoff; Manfra, Michael | We present experimental measurements of Aharonov-Bohm interference across the 1/3 plateau. | Session 62: Fractional Excitations in the Quantum Hall Effect |

877 | Phase Diagram of Majorana Island | Shen, Jie; Winkler, Georg Wolfgang; Borsoi, Francesco; Heedt, Sebastian; Levajac, Vukan; Gazibegovic, Sasa; Op het Veld, Roy; Lee, Joon Sue; Pendharkar, Mihir; dempsey, connor; Palmstrom, Chris; Bakkers, Erik; Van Heck, Bernard; Kouwenhoven, Leo | In this regime, we observe correlated oscillating peak spacing and heights. | Session 62: Fractional Excitations in the Quantum Hall Effect |

878 | Wigner Crystal Melting Phase Diagram of GaAs Two-dimensional Holes | Ma, Meng; Villegas Rosales, Kevin; Deng, Hao; Pfeiffer, Loren; West, Kenneth; Baldwin, K. W.; Shayegan, Mansour | In this work, we map out such phase diagram using a newly developed technique which probes the melting of the WC via its screening efficiency. | Session 62: Fractional Excitations in the Quantum Hall Effect |

879 | Bloch Ferromagnetism of Composite Fermions | Hossain, Md. Shafayat; Zhao, Tongzhou; Pu, Songyang; Mueed, M A; Ma, Meng; Villegas Rosales, Kevin; Chung, Edwin; Pfeiffer, Loren; West, Kenneth; Baldwin, K. W.; Jain, Jainendra; Shayegan, Mansour | Here we present an experimental realization of the elusive interaction-driven spin polarization in a dilute, 2D fermionic system, namely composite fermions (CFs). | Session 63: Fractional Quantum Hall Effect and Composite Fermions |

880 | Hall viscosity of composite fermions | Pu, Songyang; Fremling, Mikael; Jain, Jainendra | We show that the Hall viscosity for ν=n/(2pn+1) may be derived analytically from the microscopic wave functions providing some assumption. | Session 63: Fractional Quantum Hall Effect and Composite Fermions |

881 | Fractional Chern insulators in magic-angle twisted bilayer graphene in the Hofstadter regime | Andrews, Bartholomew; Soluyanov, Alexey | We apply a perpendicular magnetic field to the minimal effective two-orbital Fermi-Hubbard model describing the low-energy physics of twisted bilayer graphene at the first magic angle. | Session 63: Fractional Quantum Hall Effect and Composite Fermions |

882 | Quantum Well Width Dependence of the Fractional Quantum Hall Energy Gaps | Villegas Rosales, Kevin; Madathil, Pranav; Chung, Edwin; Baldwin, K. W.; West, Kenneth; Pfeiffer, Loren; Shayegan, Mansour | Here we present measurements of the energy gaps, from the temperature dependence of the magnetoresistance minima, of several fractional states in the lowest Landau level as a function of the width of the confining square quantum well. | Session 63: Fractional Quantum Hall Effect and Composite Fermions |

883 | Achievement of Systematically Higher Transport Mobilities for a Large Range of Two-dimensional Electron Densities in GaAs Quantum Wells | Pfeiffer, Loren; Chung, Edwin; Villegas-Rosales, K. A.; Baldwin, K. W.; West, Kenneth; Shayegan, Mansour | For the range of two-dimensional (2D) electron densities between 1.5 x 10 10 cm -2 and 1.4 x 10 11 cm -2, we report measurements that confirm a ~60 to 70 % increase in the transport mobility of remotely-doped GaAs quantum wells compared to all previous GaAs material. | Session 63: Fractional Quantum Hall Effect and Composite Fermions |

884 | Renormalization Group Flow of Dirac Composite Fermions at Half Filling | San Miguel, Jonathan; Goldman, Hart; Kumar, Prashant; Raghu, Srinivas | To better characterize this distinction, we present a renormalization group study of these theories in the presence of Coulomb interactions, using a controlled expansion both in the number of fermion species and the width of the Coulomb potential. | Session 63: Fractional Quantum Hall Effect and Composite Fermions |

885 | Heterostructure Design for High Two-dimensional Electron Density in GaAs/AlGaAs Quantum Wells at Large Hydrostatic Pressures | Chung, Edwin; Yuan, Shuai; Liu, Yang; Baldwin, K. W.; West, Kenneth; Shayegan, Mansour; Pfeiffer, Loren | Despite the exciting prospect of studying electron-electron interactions in the absence of spin splitting, there are very few experimental reports on this subject. We will also present low-temperature magnetotransport data that demonstrate the high quality of our samples at large hydrostatic pressures. | Session 63: Fractional Quantum Hall Effect and Composite Fermions |

886 | Diagnosis of universal geometric responses of fractional quantum Hall liquids | Zhu, Wei; Sheng, Donna; Liu, Zhao; Hu, Liangdong | Here, we demonstrate that Dehn-twist deformation is able to reveal both the universal modular properties and the microscopic features. | Session 63: Fractional Quantum Hall Effect and Composite Fermions |

887 | Particle-hole symmetry of the fractional quantum Hall effect in the lowest Landau level | Palacios, Eduardo; Peterson, Michael | We study the nature of particle-hole symmetry on the FQHE in the lowest Landau level under realistic conditions numerically using exact diagonalization. | Session 63: Fractional Quantum Hall Effect and Composite Fermions |

888 | Identification of topological orders in fractional quantum Hall state at ν=1/4 | Ma, Kwok Wai | In this article, we focus on non-Abelian orders from Cooper pairing between composite fermions and the Abelian Halperin-(5,5,3) order. | Session 63: Fractional Quantum Hall Effect and Composite Fermions |

889 | Anomalous nematic states in half-filled high Landau levels | Fu, Xiaojun; Shi, Qianhui; Zudov, Michael; Gardner, Geoff; Watson, John; Manfra, Michael; Baldwin, K. W.; Pfeiffer, Loren; West, Kenneth | This talk will report on emergent minima (maxima) in Rxx ( Ryy) and plateau-like features in RH in half-filled N ≥ 3 Landau levels. | Session 63: Fractional Quantum Hall Effect and Composite Fermions |

890 | Strain-induced resistance anisotropy near the FQHE v=5/2 in two-dimensional GaAs single quantum wells | Stern, Alexander; Casas, Brian; Pollanen, Johannes; Eisenstein, James; West, Kenneth; Pfeiffer, Loren; Xia, Jing | We report strain-dependent low temperature magnetotransport measurements of a two-dimensional electron gas (2DEG) confined in GaAs single quantum wells. | Session 63: Fractional Quantum Hall Effect and Composite Fermions |

891 | Density Functional Theory of the Abelian Anyon Gas | Hu, Yayun; Murthy, Ganpathy; Rao, Sumathi; Jain, Jainendra | We extend this method to treat a system of many anyons. | Session 63: Fractional Quantum Hall Effect and Composite Fermions |

892 | From CFT matrix product states to parent Hamiltonians | Schossler, Matheus; Bandyopadhyay, Sumanta; Seidel, Alexander | We study frustration free (FF) Hamiltonians of fractional quantum Hall (FQH) states from the point of view of the Matrix-product-state (MPS) representation of their ground/excited states. | Session 63: Fractional Quantum Hall Effect and Composite Fermions |

893 | Manifestations of the Uniform Berry Curvature in the Physics of Composite Fermions | JI, GUANGYUE; Shi, Junren | Based on the picture, we theoretically consider a number of possible manifestations of the uniform Berry curvature. | Session 63: Fractional Quantum Hall Effect and Composite Fermions |

894 | Fractional Quantum Hall Effect from Hilbert Space Algebra and New Approaches for Experimental Realisation | Yang, Bo; Wu, Ying-Hai; Papic, Zlatko | We show that model states of fractional quantum Hall (FQH) fluids for many topological phases can be uniquely determined by the Hilbert space algebra manifested as the classical reduced density matrix constraints, or the local exclusion constraint (LEC). | Session 64: Fractional Quantum Hall and Non-Fermi Liquids |

895 | Parton construction of particle-hole-conjugate Read-Rezayi parafermion fractional quantum Hall states | Coimbatore Balram, Ajit; Barkeshli, Maissam; Rudner, Mark | In this work, we use the parton framework to construct states that lie in the same phases as the particle-hole conjugates of the RR states. | Session 64: Fractional Quantum Hall and Non-Fermi Liquids |

896 | Bosonic Integer and Fractional Quantum Hall effect in an interacting lattice model | Gupta, Gaurav Kumar; H. R., Krishnamurthy; Bhattacharjee, Subhro | We use the Lanczos algorithm (Exact Diagonalization (ED)) to find the ground state as well as a few excited states of the system with an aim to characterize the different phases of the system. | Session 64: Fractional Quantum Hall and Non-Fermi Liquids |

897 | Parafermions in Hierarchical Fractional Quantum Hall States | Santos, Luiz | In this talk, we will discuss the properties of parafermion zero modes that arise as extrinsic non-Abelian defects in domain walls formed on interfaces of hierarchical FQH Jain states with filling fraction p/(2mp+1) of the lowest Landau level, where m and p are positive integers. | Session 64: Fractional Quantum Hall and Non-Fermi Liquids |

898 | Josephson frequency of fractional charges from Shot Noise measurements | Kapfer, Maëlle; Roulleau, Preden; Santin, Matthieu; Farrer, Ian; Ritchie, David; Glattli, Christian | Here, we present a novel fractional charge measurement based on the Josephson frequency fj=e *V/h which manifests as singularities in the Photo-Assisted Shot Noise (PASN) when fj matches the microwave irradiation frequency f. Measurements are done on a QPC realized on high mobility GaAs/AlGaAs heterojunctions. | Session 64: Fractional Quantum Hall and Non-Fermi Liquids |

899 | Absence of diffusion on the edge | Delacretaz, Luca; Glorioso, Paolo | We show that this chiral diffusive fixed point is never stable. | Session 64: Fractional Quantum Hall and Non-Fermi Liquids |

900 | Consequences of Chern bands in twisted bilayer graphene | Chatterjee, Shubhayu; Bultinck, Nick; Zaletel, Michael | At the even filling of 2 of 4 conduction bands, we argue that charged skyrmions (allowed by Chern bands) offer a natural explanation of the magnetoresistance [1]. | Session 64: Fractional Quantum Hall and Non-Fermi Liquids |

901 | Microscopic theory for the nematic fractional quantum Hall effect | Yang, Bo | This is the only part that requires numerical studies in the future work, which is potentially more tractable than the conventional numerical approaches. | Session 64: Fractional Quantum Hall and Non-Fermi Liquids |

902 | Probing Nonlinear Luttinger liquid Physics in Semiconducting Single Walled Carbon Nanotubes | Wang, Sheng; Zhao, Sihan; Shi, Zhiwen; Wu, Fanqi; Zhao, Zhiyuan; Jiang, Lili; Watanabe, Kenji; Taniguchi, Takashi; Zettl, Alex; Zhou, Chongwu; Wang, Feng | In order to describe the high-energy electron behaviors in 1D materials with nonlinear band structures, novel theoretical approaches have been employed to replace the linear dispersion with a generic one, which is known as the nonlinear Luttinger liquid theory. | Session 64: Fractional Quantum Hall and Non-Fermi Liquids |

903 | Observing a Hierarchy of Modes in a Finite-Length Nonlinear Luttinger Liquid | Vianez, Pedro; Tan, Wooi; Tsyplyatyev, Oleksandr; Jin, Yiqing; Anirban, Ankita; Anthore, Anne; Farrer, Ian; Ritchie, David; Griffiths, Jonathan; Glazman, Leonid; Ford, Christopher J | We present recent experimental data obtained for a variety of wire lengths where both first- and second-order replica modes can be observed. | Session 64: Fractional Quantum Hall and Non-Fermi Liquids |

904 | Competing phases and critical phenomena in three coupled spinless Luttinger liquids | Kundu, Sarbajaya; Tripathi, Vikram | In this talk, I will discuss phase competition in a system of three coupled spinless Luttinger liquids, using bosonization, along with a renormalization group analysis which takes into account these rotations, generating a coupling between different interaction channels even at the tree-level order in the coupling constants. | Session 64: Fractional Quantum Hall and Non-Fermi Liquids |

905 | Confinement Tuning of Non Magnetic Fractional Quantized Conductance | Kumar, Sanjeev; Pepper, Michael; Ritchie, David; Farrer, Ian | In this work, we have investigated electron transport of a weakly confined quasi-1D quantum wire formed in a GaAs/AlGaAs heterostructure. | Session 64: Fractional Quantum Hall and Non-Fermi Liquids |

906 | Super van Hove singularities in graphene-like materials | Wang, Baokai; Singh, Bahadur; Markiewicz, Robert; Bansil, Arun | We discuss the crossover from weak to strong correlations in Dirac materials by analyzing the excitonic insulator (EI) transition in a paradigmatic family of ‘slow’ graphenes. | Session 64: Fractional Quantum Hall and Non-Fermi Liquids |

907 | Topological Orders and Phase Transitions in Hofstadter-Chern Bands | Wang, Jian; Santos, Luiz | Motivated by the realization of two-dimensional moiré superlattices with unit cell of few to hundreds of nanometers in linear size, we discuss a lattice composite fermion theory that accounts for topological states in the opposite regime where the magnetic flux per unit cell is of the order of the magnetic flux quantum, which gives rise to Hofstadter-Chern bands that can be partially filled by electrons. | Session 64: Fractional Quantum Hall and Non-Fermi Liquids |

908 | Fracton topological order via quantum elasticity duality | Radzihovsky, Leo; Pretko, Michael; Hermele, Michael | I will discuss a recent discovery that elasticity theory of a two-dimensional quantum crystal is dual to a fracton tensor and to a coupled-vector gauge theories, thereby providing a concrete realization of the “fracton order” phenomenon. | Session 65: Fractons: from symmetry and fractionalisation to dynamics and realisations |

909 | Foliated Fracton Order | Chen, Xie | In this talk, I will present a new framework, which we call the “foliated fracton order”, to capture the nontrivial nature of the order in a large class of fracton models. | Session 65: Fractons: from symmetry and fractionalisation to dynamics and realisations |

910 | Fractons: The Road to Reality | Pretko, Michael | In this talk, I will give an overview of progress towards connecting the field of fractons with experiments. | Session 65: Fractons: from symmetry and fractionalisation to dynamics and realisations |

911 | Rank-2 Coulomb Spin Liquids from Classical Spins | Benton, Owen; Yan, Han; Jaubert, Ludovic; Shannon, Nicholas | In this talk I will describe an approach to finding simple, bilinear models, for classical spins which realize rank-2 Coulomb phases at low temperature [1,2]. | Session 65: Fractons: from symmetry and fractionalisation to dynamics and realisations |

912 | Ergodicity-breaking arising from Hilbert space fragmentation in dipole-conserving Hamiltonians | Pollmann, Frank; Sala de Torres-Solanot, Pablo; Rakovszky, Tibor; Verresen, Ruben; Knap, Michael | We show that the combination of charge and dipole conservation—characteristic of fracton systems—leads to an extensive fragmentation of the Hilbert space, which in turn can lead to a breakdown of thermalization. | Session 65: Fractons: from symmetry and fractionalisation to dynamics and realisations |

913 | No-Go Experiment Confirms Superdeterminism Loophole | Morales, Manuel | No-Go Experiment Confirms Superdeterminism Loophole | Session 66: Frontiers in Interdisciplinary Theory and Phenomena |

914 | A Covariant Field Reformulation of Classical Electrodynamics | Maier, William | A Covariant Field Reformulation of Classical Electrodynamics | Session 66: Frontiers in Interdisciplinary Theory and Phenomena |

915 | A New, Unified, Non-Relativistic Quantum Quaternal Physics | Massot, Claude | To confront these theoretical contradictions and to develop a mathematical model for de Broglie’s wave-particle, I did propose the new Hypothesis of the Complex Nature of Matter. | Session 66: Frontiers in Interdisciplinary Theory and Phenomena |

916 | Mikowski Space may be interpreted as a Theory of Orbitals | Kriske, Richard | When one compares the work of Kepler, with Mikowski Space, they are both Cones joined at a nexus. | Session 66: Frontiers in Interdisciplinary Theory and Phenomena |

917 | Anomaly of the Electromagnetic Duality of Maxwell Theory | Hsieh, Chang-Tse; Tachikawa, Yuji; Yonekura, Kazuya | In this work, we uncover a feature of the Maxwell theory and its duality symmetry in such a situation, namely that it has a quantum anomaly. | Session 66: Frontiers in Interdisciplinary Theory and Phenomena |

918 | A Number of Early 20th Century Important Physics Formulas, Some Nobel Prize Winning, Must Be Slightly Corrected Because They Lack Rotational and Vibrational Factors Not Known To Be Necessary When The Formulas Were Discovered | Brekke, Stewart | A Number of Early 20th Century Important Physics Formulas, Some Nobel Prize Winning, Must Be Slightly Corrected Because They Lack Rotational and Vibrational Factors Not Known To Be Necessary When The Formulas Were Discovered | Session 66: Frontiers in Interdisciplinary Theory and Phenomena |

919 | A quantum interpretation of the physical basis of mass-energy equivalence | Chang, Donald | Using a wave model which treats particles as excitations of the vacuum, we show that the relations E = mc2 can be directly derived from Planck’s relation. | Session 66: Frontiers in Interdisciplinary Theory and Phenomena |

920 | Adding a Dynamic to Gravitation Reveals How Extra Gravity Halos are Projected from Galactic Cores | Huenefeld, John | A new theory, sets GR in motion, predicting an ongoing space-time contraction within a gravitational field. | Session 66: Frontiers in Interdisciplinary Theory and Phenomena |

921 | The Higgs Boson – It’s a Matter of Time | Aquilina, Rich | The Higgs Boson – It’s a Matter of Time | Session 66: Frontiers in Interdisciplinary Theory and Phenomena |

922 | From QED to the Schrödinger equation | Efthimiades, Spyros | Due to the small value of the electromagnetic coupling constant, we can adequately describe low-energy interactions by classical potentials. | Session 66: Frontiers in Interdisciplinary Theory and Phenomena |

923 | Mathematical proof of electromagnetic wave nature of photons in hydrogen emission spectrum and theoretical derivation of Planck’s constant | Jeong, Junho | This paper presents a mathematical proof for the emission of infrared-to-ultraviolet electromagnetic waves of the hydrogen emission spectrum when an alternating current is generated by the oscillation and revolution of an electron around a hydrogen-atom proton at a radius r nor due to external energy. | Session 66: Frontiers in Interdisciplinary Theory and Phenomena |

924 | Wavefunction; Guided Energy of Wave | Ademola, Desmond Agbolade | The fundamental analysis presented in this work show that mathematical formalism of wavefunction was wrongly formulated. | Session 66: Frontiers in Interdisciplinary Theory and Phenomena |

925 | Primordial Black Holes and Gravitational Waves from Double-inflection-point Inflation | Gao, Tie-Jun | We propose a double inflection point inflationary model. | Session 66: Frontiers in Interdisciplinary Theory and Phenomena |

926 | Free surface boundary dynamics of compressible and dissipationless fluids with Hall viscosity | Ganeshan, Sriram; Monteiro, Gustavo; Abanov, Alexander; Can, Tankut | In this talk, we consider non-dissipative and compressible two-dimensional broken parity fluids with odd viscosity and magnetic field with a free surface boundary condition. | Session 67: Geometric and Fluid Properties of Quantum Hall States |

927 | Variational principle for free surface boundary dynamics of dissipationless fluids with Hall viscosity | Monteiro, Gustavo; Ganeshan, Sriram; Abanov, Alexander; Can, Tankut | In this talk, we present the variational principle for non-dissipative and compressible two-dimensional broken parity fluids with odd viscosity with a free surface boundary condition. | Session 67: Geometric and Fluid Properties of Quantum Hall States |

928 | Hall viscosity in systems with discrete symmetry: point group and lattice anisotropy | Rao, Pranav; Bradlyn, Barry | To compute these coefficients, we develop a framework to consistently write down the long-wavelength stress tensor and viscosity for multi-component systems, and apply our formalism to a few examples. | Session 67: Geometric and Fluid Properties of Quantum Hall States |

929 | Geometric response of fractional quantum Hall states to anisotropy | Krishna, Akshay; Ippoliti, Matteo; Chen, Fan; Bhatt, Ravindra | We use a combination of exact diagonalization and the infinite density matrix renormalization group (iDMRG) algorithm to quantify the extent of the anisotropic response and find a remarkable dependence on filling fraction, Landau level index, interaction type and particle statistics [1]. | Session 67: Geometric and Fluid Properties of Quantum Hall States |

930 | Non-trivial edge profile of the Laughlin wave function | Goulart Cardoso, Gabriel Jose; Abanov, Alexandre; Stéphan, Jean-Marie | Using a mix of recent Monte Carlo results and analytical methods we show that the observed profile of overshoot plus damped oscillations of the density near the edge can be explained in terms of the partial crystallization of the corresponding 2DOCP close to a boundary. | Session 67: Geometric and Fluid Properties of Quantum Hall States |

931 | Contactless pulsed tunneling spectroscopy of exciton superfluid phase in a quantum Hall bilayer | Yoo, Heun Mo; Baldwin, K. W.; West, Kenneth; Pfeiffer, Loren; Ashoori, Raymond | Here, we use a contactless pulsed tunneling technique to search for novel superfluid properties of the QH bilayer. | Session 67: Geometric and Fluid Properties of Quantum Hall States |

932 | Observation of a new reentrant integer quantum Hall state in the N=0 Landau level | Csathy, Gabor; Shingla, Vidhi; West, Kenneth; Pfeiffer, Loren | We report the observation of a reentrant integer quantum Hall state in the N = 0 Landau level near the Landau level filling factor ν=2-1/5. | Session 67: Geometric and Fluid Properties of Quantum Hall States |

933 | Collective excitations of quantum Hall states under tilted magnetic field | Yang, Kang; Goerbig, Mark; Douçot, Benoît | We study the neutral excitations of quantum Hall systems under external anisotropy introduced by tilting the magnetic field. | Session 67: Geometric and Fluid Properties of Quantum Hall States |

934 | Hall viscosity in abelian gauge theories | Mehta, Umang; Son, Dam | We investigate the Hall viscosity of U(1) gauge theories. | Session 67: Geometric and Fluid Properties of Quantum Hall States |

935 | Pseudopin transition of two-dimensional hole systems in hydraulic pressure | Liu, Yang; Huang, Ke; Pfeiffer, Loren; West, Kenneth; Baldwin, K. W.; Lin, Xi | We find that the hydraulic pressure can induce phase transition to fractional quantum Hall effect near $\nu=3/2$. | Session 67: Geometric and Fluid Properties of Quantum Hall States |

936 | Anomalous nematic states in half-filled Landau levels in tilted magnetic fields | Zudov, Michael; Fu, Xiaojun; Shi, Qianhui; Gardner, Geoff; Watson, John; Manfra, Michael; Baldwin, K. W.; Pfeiffer, Loren; West, Kenneth | In this talk we examine the effect of in-plane magnetic fields on anomalous nematic phases in half-field high Landau levels which are characterized by unexpected minima (maxima) in Rxx ( Ryy) and plateau-like features in RH emerging at low temperatures. | Session 67: Geometric and Fluid Properties of Quantum Hall States |

937 | Interlayer exciton condensates in high Landau levels in bilayer WSe2 | Shi, Qianhui; Shih, En-Min; Rhodes, Daniel; kim, Bumho; Watanabe, Kenji; Taniguchi, Takashi; Papic, Zlatko; Hone, James; Dean, Cory | We observe signatures consistent with interlayer EC when the two layers have matched LL orbital wavefunctions. | Session 67: Geometric and Fluid Properties of Quantum Hall States |

938 | Properties of Reentrant Integer Quantum Hall States in High Landau Levels | Ro, Dohyung; Deng, Nianpei; Manfra, Michael; Pfeiffer, Loren; West, Kenneth; Csathy, Gabor | We will discuss the filling factor and the temperature dependence of magnetotransport of the reentrant integer quantum Hall states in the N=3 Landau level. | Session 67: Geometric and Fluid Properties of Quantum Hall States |

939 | From Casimir Effect to Quantum Atmosphere | Jiang, Qingdong; Wilczek, Frank | I’ll breifly show how to make repulsive Casimir force by using chiral materials, but mainly discuss how symmetry breaking states of matter can transmit symmetry breaking effects to spectra. | Session 67: Geometric and Fluid Properties of Quantum Hall States |

940 | Spinning Radiation from Topological Insulator | Khan, Emroz; Narimanov, Evgenii | Here we show this coupling also leads to emergence of spin angular momentum (SAM) in the thermal radiation from TI (Phys. | Session 67: Geometric and Fluid Properties of Quantum Hall States |

941 | Fabry–Pérot Quantum Hall Interferometry in Graphene | Ronen, Yuval; Werkmeister, Thomas; Najafabadi, Danial; Pierce, Andrew; Johnson, Bobae; Watanabe, Kenji; Taniguchi, Takashi; Yacoby, Amir; Kim, Philip | We utilize hBN-encapsulated monolayer graphene with top and bottom graphite gates to electrostatically define interferometers in the FQHE regime. | Session 68: Graphene: Electron interactions |

942 | Optical conductivity of graphene with second-nearest neighbors coupling | Munoz, Enrique; Falomir, Horacio; Loewe, Marcelo; Zamora, Renato | In this work, we investigate how this property is affected by second-nearest-neighbors coupling t’. | Session 68: Graphene: Electron interactions |

943 | The equilibration dynamics of spin-polarized quantum Hall edges at graphene p-n junction | Paul, Arup; SAHU, MANAS; Kumar, Chandan; Watanabe, Kenji; Taniguchi, Takashi; Das, Anindya | In this report, we have carried out the conductance together with shot noise measurements for symmetry broken QH edges co-propagating along a pn junction. | Session 68: Graphene: Electron interactions |

944 | Light-induced anomalous Hall effect in graphene | McIver, James; Schulte, Benedikt; Stein, Falk-Ulrich; Matsuyama, Toru; Jotzu, Gregor; Meier, Guido; Cavalleri, Andrea | In this talk I will discuss our recent observation of an anomalous Hall effect in monolayer graphene driven by a femtosecond pulse of circularly polarized light [1]. | Session 68: Graphene: Electron interactions |

945 | Landau Levels in Bilayer Graphene under Pressure | Green, Brett; Sofo, Jorge | We find the ground state as function of these variables using a Hartree-Fock treatment including the effects of metallic gates, layer separation, layer thickness. | Session 68: Graphene: Electron interactions |

946 | Ballistic to hydrodynamic crossover in twisted bilayer graphene | Phinney, Isabelle; Bandurin, Denis; Watanabe, Kenji; Taniguchi, Takashi; Jarillo-Herrero, Pablo | Here we show that, at liquid helium temperatures, such devices exhibit micrometer-scale ballistic transport, probed using transverse magnetic focusing. | Session 68: Graphene: Electron interactions |

947 | Hydrodynamic electron flow in a graphene-based device with engineered edge conditions | Kamat, Rupini; Barnard, Arthur; Finney, Joe; Taniguchi, Takashi; Watanabe, Kenji; Kastner, Marc; Goldhaber-Gordon, David | Through a combination of simulations and transport measurements with this device, we tune between the two extreme boundary conditions and identify the impact of edge geometry on the flow profile of a viscous electron fluid. | Session 68: Graphene: Electron interactions |

948 | Hydrodynamic and Ballistic AC transport in two-dimensional Fermi Liquids | Morampudi, Manichandra; Kataria, Gitansh; Sahdev, Deshdeep; Sundararaman, Ravishankar | Despite this difference, we find that vortices and a negative nonlocal resistance believed to be quintessentially hydrodynamic are equally characteristic of the ballistic regime. | Session 68: Graphene: Electron interactions |

949 | Dynamic response functions of graphene with short-range interactions | Agarwal, Megha; Mishchenko, Eugene; Starykh, Oleg | We consider a short-range interaction between electrons in graphene and determine their dynamic response functions, such as a longitudinal and a transverse electric conductivity and a polarization function. | Session 68: Graphene: Electron interactions |

950 | Detecting Hall viscosity in the absence of inversion or time reversal symmetries | Imran, Muhammad | Detecting Hall viscosity in the absence of inversion or time reversal symmetries | Session 68: Graphene: Electron interactions |

951 | Reciprocal and non-reciprocal energy and momentum drag between 1D and 2D conductors | Anderson, Laurel; Cheng, Austin; Watanabe, Kenji; Taniguchi, Takashi; Kim, Philip | We have performed measurements of 1D-2D drag resistance between a single carbon nanotube (CNT) and monolayer graphene separated by a few-layer boron nitride flake. | Session 68: Graphene: Electron interactions |

952 | Cavity quantum electrodynamics with cyclotron resonance transitions in graphene | Kapoor, Yashika; Russell, Jordan; Hunt, Ellie; Lim, Rebecca; Henriksen, Erik | We will present initial results of measurements on such graphene cavity QED devices and outline prospects for reaching higher coupling strengths. | Session 68: Graphene: Electron interactions |

953 | Cyclotron Resonance in Dual-Gated Bilayer Graphene | Russell, Jordan; Balgley, Jesse; Kapoor, Yashika; Taniguchi, Takashi; Watanabe, Kenji; Henriksen, Erik | We report observations of cyclotron resonance in boron nitride-encapsulated, dual-gated bilayer graphene by way of transmission infrared magnetospectroscopy. | Session 68: Graphene: Electron interactions |

954 | Dynamic gauge field and quantum pumping in graphene nanoelectromechanical resonators | Pu, Rui; Xu, Du | Here we study the case of graphene nanoelectromechanical resonator suspended over a gate electrode as a quantum charge pump. | Session 68: Graphene: Electron interactions |

955 | Correlated Insulators in Twisted Double Bilayer Graphene | Burg, Gregory; Zhu, Jihang; Taniguchi, Takashi; Watanabe, Kenji; Macdonald, Allan; Tutuc, Emanuel | We present a combined experimental and theoretical study of twisted double bilayer graphene with twist angles near 1°. | Session 69: Graphene: Electronic Structure and Interactions II; moire and topology |

956 | Correlated states in twisted trilayer graphene | Chen, Shaowen; Hsieh, Valerie; Yankowitz, Matthew; Watanabe, Kenji; Taniguchi, Takashi; Dean, Cory | Here we show tunable band hybridization and correlated states in twisted trilayer graphene, realized by placing monolayer graphene on top of a bernal bilayer graphene. | Session 69: Graphene: Electronic Structure and Interactions II; moire and topology |

957 | Coexistence of ultraheavy and ultrarelativistic Dirac quasiparticles in sandwiched trilayer graphene. | Li, Chenyuan; Carr, Stephen; Zhu, Ziyan; Kaxiras, Efthimios; Sachdev, Subir; Kruchkov, Alex | Here we show that such a twisted sandwiched graphene (TSWG) – a three-layer van der Waals heterostructure with a twisted middle layer – can have very stable flat bands coexisting with Dirac cones near the Fermi energy when twisted to 1.5 degrees. | Session 69: Graphene: Electronic Structure and Interactions II; moire and topology |

958 | Periodically strained graphene lattice: flat bands | Milovanovic, Slavisa; Andelkovic, Misa; Covaci, Lucian; Peeters, Francois | We use a tight-binding model to calculate the band structure of periodically strained graphene lattice. | Session 69: Graphene: Electronic Structure and Interactions II; moire and topology |

959 | Experimental Discovery of High Dimensional Band Topology in Twisted Bilayer Graphene | Ma, Chao; Wang, Qiyue; Mills, Scott; Chen, Xiaolong; Deng, Bingchen; Yuan, Shaofan; Li, Cheng; Watanabe, Kenji; Taniguchi, Takashi; Xu, Du; Zhang, Fan; Xia, Fengnian | In this work, we performed a systematic nonlocal transport study and revealed the nontrivial high dimensional band topology in t-BLG. | Session 69: Graphene: Electronic Structure and Interactions II; moire and topology |

960 | Flat bands and gaps in twisted double bilayer graphene | Capaz, Rodrigo; Culchac, Francisco; Chico, Leonor; Suarez Morell, Eric | We present electronic structure calculations of twisted double bilayer graphene (TDBG): A tetralayer graphene structure composed of two AB-stacked graphene bilayers with a relative rotation angle between them. | Session 69: Graphene: Electronic Structure and Interactions II; moire and topology |

961 | Electric field tunable correlated insulating states and spin-polarized phase transitions in twisted bilayer-bilayer graphene | Rubies-Bigorda, Oriol; Cao, Yuan; Rodan-Legrain, Daniel; Park, Jeong Min; Watanabe, Kenji; Taniguchi, Takashi; Jarillo-Herrero, Pablo | We report here on a new correlated platform, twisted bilayer-bilayer graphene (TBBG), which consists of two sheets of Bernal stacked bilayer graphene rotated by a small angle. | Session 69: Graphene: Electronic Structure and Interactions II; moire and topology |

962 | Lifshitz transitions in magic-angle twisted bilayer graphene | zhang, zhenyuan; Wu, Shuang; Andrei, Eva | Here we report on magneto-transport measurements of a twisted bilayer graphene device(1.17°±0.02°). | Session 69: Graphene: Electronic Structure and Interactions II; moire and topology |

963 | Chern insulators at odd fillings in magic-angle twisted bilayer graphene | Wu, Shuang; zhang, zhenyuan; Andrei, Eva | We report on magneto-transport measurements of a twisted bilayer graphene device(1.17°±0.02°). | Session 69: Graphene: Electronic Structure and Interactions II; moire and topology |

964 | Nematicity in twisted bilayer graphene: impact of the moiré superlattice | Fernandes, Rafael; Venderbos, J.W.F. | Here, we theoretically investigate the coupling between electronic nematic and moiré superlattice degrees of freedom. | Session 69: Graphene: Electronic Structure and Interactions II; moire and topology |

965 | Z2 topology and edge states of twisted bilayer graphene | Ma, Chao; Wang, Qiyue; Mills, Scott; Chen, Xiaolong; Deng, Bingchen; Yuan, Shaofan; Li, Cheng; Watanabe, Kenji; Taniguchi, Takashi; Xu, Du; Zhang, Fan; Xia, Fengnian | We demonstrate that, while an unusual symmetry of tBLG trivializes the Berry curvature, two Z2 invariants characterize the topology of the moiré Dirac bands. | Session 69: Graphene: Electronic Structure and Interactions II; moire and topology |

966 | Topological Floquet engineering of twisted bilayer graphene | Sentef, Michael; Topp, Gabriel; Jotzu, Gregor; McIver, James; Xian, Lede; Rubio, Angel | We investigate the topological properties of Floquet-engineered twisted bilayer graphene above the magic angle driven by circularly polarized laser pulses. | Session 69: Graphene: Electronic Structure and Interactions II; moire and topology |

967 | Topological charge pumping by sliding moiré pattern | Fujimoto, Manato; Koschke, Henri; Koshino, Mikito | We theoretically study the adiabatic topological charge pumping driven by interlayer sliding in the moiré superlattices. | Session 69: Graphene: Electronic Structure and Interactions II; moire and topology |

968 | Artificial gauge field in Moiré superlattices | Shang, Ce; Abbout, Adel; Zang, Xiaoning; Schwingenschloegl, Udo; Manchon, Aurelien | Here, we propose a method to create a tunable, artificial gauge potential in a periodically modulated Moiré superlattice. | Session 69: Graphene: Electronic Structure and Interactions II; moire and topology |

969 | Multiple topological phases in graphene via magnetoelectric proximity effect | Takenaka, Hiroyuki; Sandhoefner, Shane; Kovalev, Alexey; Tsymbal, Evgeny | Here we propose a new approach to control the topological electronic states of a two-dimensional material by the proximity of a magnetoelectric antiferromagnet. | Session 69: Graphene: Electronic Structure and Interactions II; moire and topology |

970 | Electronic Collective Modes in Twisted Bilayer Graphene | Werner, Nicholas; Bill, Andreas | We study electronic collective modes in bilayer graphene at various twist angles with a particular emphasis on low-energy plasmons. | Session 70: Graphene: Electronic Structure and Interactions III; Moire, Correlations, & Topology |

971 | Charge Smoothening and Band Flattening due to Hartree corrections in Twisted Bilayer Graphene | Rademaker, Louk; Mellado, Paula; Abanin, Dmitry | Here we show, using unbiased real-space self-consistent Hartree calculations on a relaxed lattice, that Coulomb interactions smoothen this charge imbalance by changing the occupation of earlier identified ‘ring’ orbitals in the AB/BA region and ‘center’ orbitals at the AA region. | Session 70: Graphene: Electronic Structure and Interactions III; Moire, Correlations, & Topology |

972 | Electrostatic Tuning of the Coulomb Interaction in Single Layer Graphene | Dale, Nicholas; Mori, Ryo; Utama, Iqbal; Fatuzzo, Claudia; Denlinger, Jonathan; Stansbury, Conrad; Zhao, Sihan; Lee, Kyunghoon; Taniguchi, Takashi; Watanabe, Kenji; Wang, Feng; Lanzara, Alessandra | In this talk, I will discuss recent in-operando angle-resolved photoemission studies on single layer graphene where we directly visualize modifications of its electronic band structure upon tuning the Fermi Energy. | Session 70: Graphene: Electronic Structure and Interactions III; Moire, Correlations, & Topology |

973 | Streamlining twisted bilayer graphene measurements | Finney, Joe; Sharpe, Aaron; Barnard, Arthur; Hsueh, Connie; Fox, Eli; Watanabe, Kenji; Taniguchi, Takashi; Kastner, Marc; Goldhaber-Gordon, David | In this work, I present a few tools we have used in order to streamline the process of making and measuring TBG samples, along with some interesting results encountered along the way. | Session 70: Graphene: Electronic Structure and Interactions III; Moire, Correlations, & Topology |

974 | Fabrication and Scanning Tunneling Spectroscopy of Magic Angle Twisted Bilayer Graphene | Myers, Rachel; Zhang, Zhiming; Taniguchi, Takashi; Watanabe, Kenji; LeRoy, Brian | We discuss the dry transfer technique that enables high accuracy rotational alignment that we have used to fabricate magic angle twisted bilayer graphene devices for scanning probe microscopy measurements. | Session 70: Graphene: Electronic Structure and Interactions III; Moire, Correlations, & Topology |

975 | Theory of Current-induced Magnetization Switching in Twisted Bilayer Graphene | He, Wenyu; Goldhaber-Gordon, David; Law, Kam Tuen | In this work, we demonstrate that, in TBGs, the twist-induced reduction of lattice symmetry allows a charge current to generate net orbital magnetization at a general filling factor through magnetoelectric effects. | Session 70: Graphene: Electronic Structure and Interactions III; Moire, Correlations, & Topology |

976 | Berry Curvature Dipole in Strained Graphene: a Fermi Surface Warping Effect | Battilomo, Raffaele; Scopigno, Niccolo’; Ortix, Carmine | Here, we prove that this topological effect does emerge in two-dimensional Dirac materials even in the complete absence of spin-orbit coupling. | Session 70: Graphene: Electronic Structure and Interactions III; Moire, Correlations, & Topology |

977 | Electron-phonon interactions in twisted bilayer graphene | Pimenta, Marcos; Eliel, Gomes; Moutinho, Marcus; Venezuela, Pedro; Righi, Ariete; Chiu, Po-Wen | We will discuss a resonance Raman study of twisted bilayer graphene (TBG) samples with different twisting angles and measured using different laser lines. | Session 70: Graphene: Electronic Structure and Interactions III; Moire, Correlations, & Topology |

978 | Atomistic Caculation of Electron-Phonon Coupling in Twisted Graphene Layers | Choi, Young Woo; Choi, Hyoung Joon | We investigate electron-phonon coupling in twisted graphene layers based on atomistic calculations of electronic structure, phonon dispersion, and electron-phonon matrix elements. | Session 70: Graphene: Electronic Structure and Interactions III; Moire, Correlations, & Topology |

979 | Observation of Substrate Induced Multiple Dirac Cones in Graphene/ SiC Heterostructure | Lu, Qiangsheng; Cook, Jacob; Zhang, Xiaoqian; Bian, Guang | In this work, we measured the electronic structure of bilayer graphene/SiC heterostructure. | Session 70: Graphene: Electronic Structure and Interactions III; Moire, Correlations, & Topology |

980 | Localized doping through lithium intercalation in twisted bilayer graphene | Larson, Daniel; Tritsaris, Georgios; Carr, Stephen; Kaxiras, Efthimios | Localized doping through lithium intercalation in twisted bilayer graphene | Session 70: Graphene: Electronic Structure and Interactions III; Moire, Correlations, & Topology |

981 | Scanning Tunneling Microscopy Studies of Electronic Correlations in Magic Angle Twisted Bilayer Graphene | Choi, Youngjoon; Zhang, Yiran; Arora, Harpreet; Polski, Robert; Watanabe, Kenji; Taniguchi, Takashi; Nadj-Perge, Stevan | In this talk, we will present our latest STM results and discuss spatial spectroscopic maps revealing new insights into this system. | Session 70: Graphene: Electronic Structure and Interactions III; Moire, Correlations, & Topology |

982 | Hofstadter butterfly and quantum Hall effect in twisted double bilayer graphene | Crosse, John A.; Koshino, Mikito; Moon, Pilkyung | In this talk, I will discuss the energy spectrum and quantum Hall effect in twisted double bilayer graphene (TDBG, a pair of Bernal-stacked bilayer graphenes stacked with a rotational stacking fault). | Session 70: Graphene: Electronic Structure and Interactions III; Moire, Correlations, & Topology |

983 | Ground State of Magic Angle Twisted Bilayer Graphene at Charge Neutrality II | Liu, Shang; Bultinck, Nick; Khalaf, Eslam; Chatterjee, Shubhayu; Vishwanath, Ashvin; Zaletel, Michael | Here, using a combination of analytical arguments and numerical calculations we identify a family of candidate insulating ground states at charge neutrality and discuss how external perturbations such as the influence of the substrate or strain can alter the phase diagram. | Session 71: Graphene: Electronic Structure and Interactions Interactions: Moire, Correlations, and Topology |

984 | Marginal Fermi liquid and dynamical symmetry breaking from Coulomb interaction in twisted bilayer graphene | Gonzalez, Jose; Stauber, Tobias | We investigate the effects of the strong Coulomb interaction near the magic angle of twisted bilayer graphene, focusing on the charge neutrality point and near half-filling of the highest valence band. | Session 71: Graphene: Electronic Structure and Interactions Interactions: Moire, Correlations, and Topology |

985 | Electrostatic gate-controlled fermi level dependent electronic band structure of graphene | Muzzio, Ryan; Jones, Alfred; Koch, Roland; Curcio, Davide; biswas, Deepnarayan; Miwa, Jill; Hofmann, Philip; Singh, Simranjeet; Jozwiak, Chris; Rotenberg, Eli; Bostwick, Aaron; Ulstrup, Søren; Katoch, Jyoti | We will present our results on the electrostatic gate controlled electronic band structure of graphene using nanoARPES. | Session 71: Graphene: Electronic Structure and Interactions Interactions: Moire, Correlations, and Topology |

986 | Correlated states in magic angle twisted bilayer graphene under the optical conductivity scrutiny | Bascones, Elena; Calderón, María | We will show how optical conductivity measurements allow to distinguish different symmetry breaking states and to follow the evolution of the band distortions with doping. | |

987 | Correlated states and tunable topological bands in twisted monolayer-bilayer graphene heterostructures | Polshyn, Hryhoriy; Zhu, Jihang; Kumar, Manish; Taniguchi, Takashi; Watanabe, Kenji; MacDonald, Allan; Young, Andrea | We experimentally investigate twisted van der Waals heterostructures of monolayer graphene rotated with respect to a bernal stacked graphene bilayer. | |

988 | Hartree Fock study of insulating states in twisted bilayer graphene using hybrid Wannier basis | Hejazi, Kasra; Chen, Xiao; Balents, Leon | In this work, the insulating behavior of twisted bilayer graphene and in particular the quantum anomalous Hall state has been studied; the effects of electron-electron interaction are taken into account by performing a Hartree-Fock analysis which is the standard approach for finding symmetry broken states. | |

989 | Local electronic compressibility of magic angle twisted bilayer graphene | Zondiner, Uri; Rozen, Asaf; Rodan, Daniel; Cao, Yuan; Queiroz, Raquel; Taniguchi, Takashi; Watanabe, Kenji; Oreg, Yuval; von Oppen, Felix; Stern, Ady; Berg, Erez; Jarillo-Herrero, Pablo; Ilani, Shahal | In this talk, we probe the local electronic compressibility of MATBG using a scanning single electron transistor. | |

990 | Towards correlated electron states in trilayer-graphene Moiré band | Tsai, Kan-Ting; Zhang, Xi; Zhu, Ziyan; Carr, Stephen; Luskin, Mitchell; Kim, Philip; Kaxiras, Efthimios; Wang, Ke | Beyond this model system, this work focuses on studying a new Moiré platform based on the twisted trilayer-graphene. | |

991 | Band flattening in slightly twisted bilayers of Bravais networks | Kariyado, Toshikaze; Vishwanath, Ashvin | From the generic theory, we can find an interesting possibility of anisotropic band flattening, in which quasi 1D band dispersion is generated from relatively isotropic original band dispersion. | |

992 | Twist disorder in twisted bilayer graphene | Wilson, Justin; Fu, Yixing; Das Sarma, Sankar; Pixley, Jed | We find that while the minibandwidth and gap are renormalized substantially, the Fermi velocity is not significantly altered. | |

993 | Higher-Order Topological Insulator in Twisted Bilayer Graphene | Park, Moon Jip; Kim, Youngkuk; Cho, Gil Young; Lee, SungBin | In this work, we propose the twisted bilayer graphenes with large angles as higher-order topological insulators, hosting topological corner charges. | |

994 | Topological flat bands without magic angles in massive twisted bilayer graphenes | Javvaji, Srivani; Sun, Jin-Hua; Jung, Jeil | We show that in massive twisted bilayer graphenes, isolated nearly flat bands below a threshold bandwidth W c are expected for continuous small twist angles up to a critical θ c depending on the flatness of the original bands and the interlayer coupling strength. | |

995 | Attractive electron-electron interactions from internal screening in magic angle twisted bilayer graphene | Goodwin, Zachary; Mostofi, Arash; Lischner, Johannes | We have studied the effect of internal screening on electron-electron interactions and Hubbard parameters in undoped tBLG, within the random phase approximation (RPA) and constrained RPA (cRPA). | |

996 | Twistronics in bilayer graphene and other systems | Ray, Sujay | We present our work on the theory of Wannier pair in twisted bilayer graphene. | |

997 | Symmetry breaking states at commensurate fillings of the Moire bands of the twisted bilayer graphene | Zhang, Yi; Jiang, Kun; Wang, Ziqiang; Zhang, Fu-Chun | We study the twisted bilayer graphene system with the continuous model together with the long-range Coulomb interaction. |