Spatial electron-spin splitting in single-layered semiconductor microstructure modulated by Dresselhaus spin-orbit coupling

doi:10.1088/1674-1056/ad6b83

Abstract Combining theory and computation, we explore the Goos-Hänchen (GH) effect for electrons in a single-layered semiconductor microstructure (SLSM) modulated by Dresselhaus spin-orbit coupling (SOC). GH displacement depends on electron spins thanks to Dresselhaus SOC, therefore electron spins can be separated from the space domain and spin-polarized electrons in semiconductors can be realized. Both the magnitude and sign of the spin polarization ratio change with the electron energy, in-plane wave vector, strain engineering and semiconductor layer thickness. The spin polarization ratio approaches a maximum at resonance; however, no electron-spin polarization occurs in the SLSM for a zero in-plane wave vector. More importantly, the spin polarization ratio can be manipulated by strain engineering or semiconductor layer thickness, giving rise to a controllable spatial electron-spin splitter in the field of semiconductor spintronics.

Keywords: semiconductor spintronics single-layered semiconductor microstructure (SLSM) spin-orbit coupling (SOC) Goos-Hänchen (GH) effect electron-spin polarization

Received: 19 May 2024
Revised: 01 August 2024
Accepted manuscript online: 06 August 2024

PACS:	85.75.-d	(Magnetoelectronics; spintronics: devices exploiting spin polarized transport or integrated magnetic fields)
	72.80.Ey	(III-V and II-VI semiconductors)
	71.70.Ej	(Spin-orbit coupling, Zeeman and Stark splitting, Jahn-Teller effect)
	72.25.Dc	(Spin polarized transport in semiconductors)

Fund: Project supported by the National Natural Science Foundation of China (Grant No. 62164005).

Corresponding Authors: Sai-Yan Chen, Mao-Wang Lu
E-mail: maowanglu@glut.edu.cn;sychen02@126.com

Cite this article:

Jia-Li Chen(陈嘉丽), Sai-Yan Chen(陈赛艳), Li Wen(温丽), Xue-Li Cao(曹雪丽), and Mao-Wang Lu(卢卯旺) Spatial electron-spin splitting in single-layered semiconductor microstructure modulated by Dresselhaus spin-orbit coupling 2024 Chin. Phys. B 33 118501

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Spatial electron-spin splitting in single-layered semiconductor microstructure modulated by Dresselhaus spin-orbit coupling

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