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Nonlinear Planar Hall Effect

Journal Article · · Physical Review Letters
 [1];  [2];  [1];  [1];  [3];  [4];  [1]
  1. National Univ. of Singapore (Singapore). Dept. of Electrical and Computer Engineering, and National Univ. of Singapore Nanoscience & Nanotechnology Initiative (NUSNNI)
  2. Argonne National Lab. (ANL), Argonne, IL (United States). Materials Science Division; Univ. of Missouri, Columbia, MO (United States). Dept. of Physics and Astronomy
  3. Argonne National Lab. (ANL), Argonne, IL (United States). Materials Science Division
  4. Univ. of Missouri, Columbia, MO (United States). Dept. of Physics and Astronomy
An intriguing property of a three-dimensional (3D) topological insulator (TI) is the existence of surface states with spin-momentum locking, which offers a new frontier of exploration in spintronics. In this work, we report the observation of a new type of Hall effect in a 3D TI $$\mathrm{Bi_2Se_3}$$ film. The Hall resistance scales linearly with both the applied electric and magnetic fields and exhibits a $$\pi/2$$ angle offset with respect to its longitudinal counterpart, in contrast to the usual angle offset of $$\pi/4$$ between the linear planar Hall effect and the anisotropic magnetoresistance. This novel nonlinear planar Hall effect originates from the conversion of a nonlinear transverse spin current to a charge current due to the concerted actions of spin-momentum locking and time-reversal symmetry breaking, which also exists in a wide class of noncentrosymmetric materials with a large span of magnitude. Finally, it provides a new way to characterize and utilize the nonlinear spin-to-charge conversion in a variety of topological quantum materials.
Research Organization:
Argonne National Laboratory (ANL), Argonne, IL (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES); USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
Grant/Contract Number:
AC02-06CH11357
OSTI ID:
1543281
Alternate ID(s):
OSTI ID: 1546420
Journal Information:
Physical Review Letters, Journal Name: Physical Review Letters Journal Issue: 1 Vol. 123; ISSN 0031-9007; ISSN PRLTAO
Publisher:
American Physical Society (APS)Copyright Statement
Country of Publication:
United States
Language:
English

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Cited By (1)

Planar Hall effect in PtSe 2 journal February 2020

Figures / Tables (13)


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