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

Yang Wang, Yong Wang, Tao Wang, Xinhao Wang, Yusheng Ou, Yi Ji, Matthew F. Doty, Stephanie A. Law, and John Q. Xiao
Phys. Rev. B 102, 125430 – Published 23 September 2020
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Abstract

In recent years, nonreciprocal transport measurement has emerged as a probe of spin orbit interaction, spin texture, superconductivity, and other fundamental properties of materials. Here, we study the nonlinear Hall effect (NLHE) in Bi2Se3/CoFeB heterostructures measured by second harmonic voltage method. Magneto-optical Kerr effect measurements demonstrate the origin of the NLHE to be the asymmetric magnon scattering mechanism. 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 that explains the enhancement of the NLHE below 50 K as a result of one-dimensional antilocalization of electrons from spin disorder, enabled by spin-momentum locking and conservation of angular momentum.

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  • Received 16 July 2020
  • Accepted 10 September 2020

DOI:https://doi.org/10.1103/PhysRevB.102.125430

©2020 American Physical Society

Physics Subject Headings (PhySH)

Condensed Matter, Materials & Applied Physics

Authors & Affiliations

Yang Wang1,*, Yong Wang2, Tao Wang1, Xinhao Wang1, Yusheng Ou2, Yi Ji1, Matthew F. Doty2, Stephanie A. Law2, and John Q. Xiao1,†

  • 1Department of Physics and Astronomy, University of Delaware, Newark, Delaware 19716, USA
  • 2Department of Materials Science and Engineering, University of Delaware, Newark, Delaware 19716, USA

  • *yangwang@udel.edu
  • jqx@udel.edu

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Issue

Vol. 102, Iss. 12 — 15 September 2020

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