Temperature dependence of side-jump contribution to anomalous/spin Hall conductivities

ORAL

Abstract

The side-jump contribution to anomalous/spin Hall conductivities is conventionally understood
to be a constant independent of both the scattering strength and density of scatterers, even though
it depends on the type of scatterer. In this work, we reveal that the side-jump contribution due
to electron-phonon scattering, the primary source of scattering in clean samples, can in fact acquire
substantial temperature dependence when the temperature drops below the high-temperature
classical regime of equipartition law. We demonstrate this phenomenon in an analytic model, supplemented
by a first-principles calculation for pure Pt. Experimentally accessible high-purity Pt is
proposed to be suitable for observing the predicted prominent variation of the spin Hall conductivity
below 80 K.

*C.X. and Q.N. are supported by DOE (DE-FG03-02ER45958, Division of Materials Science and Engineering), NSF (EFMA-1641101) and Welch Foundation (F-1255). S.A.Y. is supported by Singapore Ministry of Education AcRF Tier 2 (MOE2017-T2-2-108). Y. Liu and Z. Yuan is supported by the NSFC (Grants No. 61604013, No. 61774018, and No. 11734004), the Recruitment Program of Global Youth Experts, and the Fundamental Research Funds for the Central Universities (Grants No. 2016NT10 and No. 2018EYT03).

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Presenters

  • Cong Xiao

    • University of Texas at Austin
    • Department of Physics, University of Texas at Austin

Authors

  • Cong Xiao

    • University of Texas at Austin
    • Department of Physics, University of Texas at Austin

  • Yi Liu

    • The Center for Advanced Quantum Studies and Department of Physics, Beijing Normal University

  • Zhe Yuan

    • The Center for Advanced Quantum Studies and Department of Physics, Beijing Normal University

  • Shengyuan Yang

    • Singapore University of Technology and Design
    • Engineering Product Development, Singapore University of Technology and Design
    • Science and Math, Singapore University of Technology and Design
    • Research Laboratory for Quantum Materials, Singapore University of Technology and Design

  • Qian Niu

    • University of Texas at Austin
    • Department of Physics, The University of Texas at Austin
    • Department of Physics, University of Texas at Austin
    • Physics, University of Texas at Austin