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- Title
Giant c-axis nonlinear anomalous Hall effect in Td-MoTe2 and WTe2.
- Authors
Tiwari, Archana; Chen, Fangchu; Zhong, Shazhou; Drueke, Elizabeth; Koo, Jahyun; Kaczmarek, Austin; Xiao, Cong; Gao, Jingjing; Luo, Xuan; Niu, Qian; Sun, Yuping; Yan, Binghai; Zhao, Liuyan; Tsen, Adam W.
- Abstract
While the anomalous Hall effect can manifest even without an external magnetic field, time reversal symmetry is nonetheless still broken by the internal magnetization of the sample. Recently, it has been shown that certain materials without an inversion center allow for a nonlinear type of anomalous Hall effect whilst retaining time reversal symmetry. The effect may arise from either Berry curvature or through various asymmetric scattering mechanisms. Here, we report the observation of an extremely large c-axis nonlinear anomalous Hall effect in the non-centrosymmetric Td phase of MoTe2 and WTe2 without intrinsic magnetic order. We find that the effect is dominated by skew-scattering at higher temperatures combined with another scattering process active at low temperatures. Application of higher bias yields an extremely large Hall ratio of E⊥/E|| = 2.47 and corresponding anomalous Hall conductivity of order 8 × 107 S/m. Certain materials without inversion symmetry may allow for a nonlinear anomalous Hall effect with conserved time reversal symmetry. Here, the authors report an extremely large c-axis nonlinear anomalous Hall effect in the non-centrosymmetric Td phase of MoTe2 and WTe2 without intrinsic magnetic order that is dominated by extrinsic scattering.
- Subjects
ANOMALOUS Hall effect; TIME reversal; MAGNETIC fields; LOW temperatures
- Publication
Nature Communications, 2021, Vol 12, Issue 1, p1
- ISSN
2041-1723
- Publication type
Article
- DOI
10.1038/s41467-021-22343-5