Thermal induced spin-polarized current protected by spin-momentum locking in nanowires

Abstract

Spin-momentum locking arising from strong spin-orbit coupling is one of the key natures of topological materials. Since charge can induce a spin polarization due to spin-momentum locking, the search for materials that exhibit this feature has become one of the top priorities in the field of spintronics. In this paper, we report the electrical detection of the spin-transport properties of nanowires, using a nonlocal geometry measurement. A clear hysteresis voltage signal, which depends on the relative orientations between the magnetization of the ferromagnetic electrodes and the carrier spin polarization, has been observed. The hysteresis voltage states can be reversed by altering the electron movement direction, providing direct evidence of the spin-momentum locking feature of nanowires and revealing its topological nature. Furthermore, the current-dependent measurement suggests that the charge (spin) current is induced by thermal effect, which utilizes the thermoelectric properties of . Using the thermal effect to control the spin-polarized current protected by spin-momentum locking offers possibilities for small-sized devices based on the topological materials.

Metadata

Item Type:	Article
Authors/Creators:	Ning, Jiai Peng, Wanli Wang, Wei Chen, Zhendong Yang, Pei Chen, Yequan Zhao, Yafei Sun, Yizhe Kanagaraj, Moorthi Yang, Long Gao, Qinwu Zhang, Junran Zhao, Degang Pan, Danfeng Ruan, Xuezhong Li, Yao Liu, Wenqing He, Liang Chen, Zhi Gang Xu, Yongbing https://orcid.org/0000-0002-7823-0725
Copyright, Publisher and Additional Information:	© 2021 American Physical Society. This is an author-produced version of the published paper. Uploaded in accordance with the publisher’s self-archiving policy. Further copying may not be permitted; contact the publisher for details. Funding Information: National Basic Research Program of China (973 Program) National Natural Science Foundation of China Engineering and Physical Sciences Research Council Royal Society Leverhulme Trust Funding Information: This paper is supported by the National Key R&D Program of China (Grants No. 2016YFA0300803 and No. 2017YFA0206304), the National Basic Research Program of China (Grant No. 2014CB921101), the National Natural Science Foundation of China (Grants No. 61674079, No. 61974061), Jiangsu NSF (Grant No. BK20140054), UK EPSRC (Grant No. EP/S010246/1), Royal Society (Grant No. IEC\NSFC\181680), and the Leverhulme Trust (Grant No. LTSRF1819\15\12). Publisher Copyright: © 2021 American Physical Society
Dates:	Published: 26 July 2021 Accepted: 2 July 2021
Institution:	The University of York
Academic Units:	The University of York > Faculty of Sciences (York) > Electronic Engineering (York)
Depositing User:	Pure (York)
Date Deposited:	02 Nov 2021 11:50
Last Modified:	16 Oct 2024 17:57
Published Version:	https://doi.org/10.1103/PhysRevB.104.035429
Status:	Published
Refereed:	Yes
Identification Number:	10.1103/PhysRevB.104.035429
Related URLs:	http://www.scopus.com/inward/record.url?...
Open Archives Initiative ID (OAI ID):	oai:eprints.whiterose.ac.uk:179898

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Thermal induced spin-polarized current protected by spin-momentum locking in nanowires

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