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DOE OSTI · 1802975

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

Wang, Yang·Wang, Yong·Wang, Tao·Wang, Xinhao·Ou, Yusheng·Ji, Yi·Doty, Matthew F.·Law, Stephanie A.·Xiao, John Q.
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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 Bi 2 Se 3 /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 Bi 2 Se 3 is observed between 5 and 50 K. In this work, 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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75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITYMaterials SciencePhysicsantilocalization, nonlinear Hall effect, topological insulators

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Wang, Yang, Wang, Yong, Wang, Tao, Wang, Xinhao, Ou, Yusheng, Ji, Yi, Doty, Matthew F., Law, Stephanie A., Xiao, John Q.. 2020-09-23. One-dimensional antilocalization of electrons from spin disorder probed by nonlinear Hall effect. https://doi.org/10.1103/physrevb.102.125430

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