Nonlinear Planar Hall Effect
Journal Article
·
· Physical Review Letters
- National Univ. of Singapore (Singapore). Dept. of Electrical and Computer Engineering, and National Univ. of Singapore Nanoscience & Nanotechnology Initiative (NUSNNI)
- Argonne National Lab. (ANL), Argonne, IL (United States). Materials Science Division; Univ. of Missouri, Columbia, MO (United States). Dept. of Physics and Astronomy
- Argonne National Lab. (ANL), Argonne, IL (United States). Materials Science Division
- 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
Planar Hall effect in PtSe 2
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journal | February 2020 |
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