One-dimensional antilocalization of electrons from spin disorder probed by nonlinear Hall effect

ORAL

Abstract

Over the past few years, nonreciprocal transport measurement has emerged as a probe of spin orbit interaction, spin texture, superconductivity and other fundamental properties of materials [1]. In this presentation, we report on the nonlinear Hall effect (NLHE) in Bi2Se3/CoFeB heterostructures measured by second harmonic voltage method. Magneto-optical Kerr effect and transport measurements point the origin of the NLHE to be the asymmetric magnon scattering mechanism [2]. Moreover, a linear relation between the nonlinear Hall resistance and the electron phase coherence length of Bi2Se3 is observed between 5 and 50 K. We propose a phenomenological model and suggest the enhancement of the NLHE below 50 K as evidence for strict one-dimensional antilocalization of electrons from spin disorder [3].

[1] Y. Tokura and N. Nagaosa, Nat. Commun. 9, 3740 (2018).
[2] K. Yasuda, et al., Phys. Rev. Lett. 119, 137204 (2017).
[3] Y. Wang, et al., Phys. Rev. B 102, 125430 (2020).

*This work was supported by the U.S. DOE, Office of Basic Energy Sciences, under contract number DE-SC0016380. We acknowledge use of the Materials Growth Facility at the University of Delaware.

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Presenters

  • Yang Wang

    • University of Delaware

Authors

  • Yang Wang

    • University of Delaware

  • Yong Wang

    • University of Delaware

  • Tao Wang

    • University of Delaware

  • Xinhao Wang

    • University of Delaware

  • Yu-Sheng Ou

    • University of Delaware

  • Yi Ji

    • University of Delaware

  • Matthew F Doty

    • Department of Materials Science and Engineering, University of Delaware
    • University of Delaware

  • Stephanie Ann Law

    • University of Delaware

  • John Q Xiao

    • University of Delaware