Quantum nonlinear Hall effect in two-dimensional materials with time-reversal symmetry

ORAL

Abstract

We study the quantum nonlinear Hall effect in two-dimensional (2D) materials with time-reversal symmetry. When only one mirror line exists, a transverse charge current occurs in the second-order response to an external electric field, as a result of the Berry curvature dipole in momentum space. Candidate 2D materials to observe this effect are two-dimensional transition metal dichalcogenides (TMDCs)1. First, we use an ab initio based tight-binding approach to demonstrate that monolayer Td-structure TMDCs exhibit a finite Berry curvature dipole. In the 1H and 1T′ phase of TMDCs, we show the emergence of a finite Berry curvature dipole with the application of strain and an electrical displacement field, respectively.

1. Jhih-Shih You, Shiang Fang, Su-Yang Xu, Efthimios Kaxiras, and Tony Low, Phys. Rev. B 98, 121109(R)

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Presenters

  • Jhih-Shih You

    • IFW - Dresden
    • Institute for Theoretical Solid State Physics, IFW Dresden

Authors

  • Jhih-Shih You

    • IFW - Dresden
    • Institute for Theoretical Solid State Physics, IFW Dresden

  • Shiang Fang

    • Department of Physics, Harvard University

  • Suyang Xu

    • Department of Physics, Massachusetts Institute of Technology
    • Massachusetts Institute of Technology
    • MIT
    • Physics, MIT
    • Department of Physics, Massachusetts Institute of Technology, Cambridge

  • Efthimios Kaxiras

    • Harvard University
    • Department of Physics, Harvard University
    • Physics, Harvard University

  • Tony Low

    • Electrical and Computer Engineering, University of Minnesota
    • University of Minnesota
    • Department of Electrical and Computer Engineering, University of Minnesota