Observation of The Second Harmonic Generation in Layered Antiferromagnet CuCrP2S6

APS  ·  2024

Shunta Aoki; Yu Dong; Ziqian Wang; Xiang Huang; Yuki Itahashi; Naoki Ogawa; Toshiya Ideue; Yoshihiro Iwasa;

HIGHLIGHT

Characteristic behaviors of the SHG signal and their possible origins will be also discussed in the presentation.

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ABSTRACT

In van der Waals antiferromagnets, a variety of magnetic structures are realized, leading to unique magnetic and optical properties. Among them, second harmonic generation (SHG) is a powerful probe of the spatial inversion symmetry breaking as well as the complex magnetic symmetry. Here, we report the observation of SHG in exfoliated van der Waals antiferromagnet CuCrP 2S 6 (CCPS). Structural phase transition from centrosymmetric to non-centrosymmetric crystal structure and an antiferromagnetic phase transition, which have been reported in the previous studies of bulk CCPS [1], was successfully observed as the intensity/polarization-dependent-pattern changes of SHG. Characteristic behaviors of the SHG signal and their possible origins will be also discussed in the presentation. [1] C. C. B. Park et al. Adv. Electron. Mater. 2101072 (2022)

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