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Giant c-axis nonlinear anomalous Hall effect in Td-MoTe2 and WTe2

Author

Listed:
  • Archana Tiwari

    (University of Waterloo)

  • Fangchu Chen

    (University of Waterloo)

  • Shazhou Zhong

    (University of Waterloo)

  • Elizabeth Drueke

    (University of Michigan)

  • Jahyun Koo

    (Department of Condensed Matter Physics, Weizmann Institute of Science)

  • Austin Kaczmarek

    (University of Michigan)

  • Cong Xiao

    (The University of Texas at Austin)

  • Jingjing Gao

    (Chinese Academy of Sciences)

  • Xuan Luo

    (Chinese Academy of Sciences)

  • Qian Niu

    (The University of Texas at Austin)

  • Yuping Sun

    (Chinese Academy of Sciences
    Chinese Academy of Sciences
    Nanjing University)

  • Binghai Yan

    (Department of Condensed Matter Physics, Weizmann Institute of Science)

  • Liuyan Zhao

    (University of Michigan)

  • Adam W. Tsen

    (University of Waterloo)

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.

Suggested Citation

  • Archana Tiwari & Fangchu Chen & Shazhou Zhong & Elizabeth Drueke & Jahyun Koo & Austin Kaczmarek & Cong Xiao & Jingjing Gao & Xuan Luo & Qian Niu & Yuping Sun & Binghai Yan & Liuyan Zhao & Adam W. Tse, 2021. "Giant c-axis nonlinear anomalous Hall effect in Td-MoTe2 and WTe2," Nature Communications, Nature, vol. 12(1), pages 1-8, December.
    • Handle: RePEc:nat:natcom:v:12:y:2021:i:1:d:10.1038_s41467-021-22343-5
    DOI: 10.1038/s41467-021-22343-5
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