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Spatial electron-spin splitting in single-layered semiconductor microstructure modulated by Dresselhaus spin-orbit coupling |
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)† |
College of Physics and Electronic Information Engineering, Guilin University of Technology, Guilin 541004, China |
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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.
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Received: 19 May 2024
Revised: 01 August 2024
Accepted manuscript online: 06 August 2024
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PACS:
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85.75.-d
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(Magnetoelectronics; spintronics: devices exploiting spin polarized transport or integrated magnetic fields)
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72.80.Ey
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(III-V and II-VI semiconductors)
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71.70.Ej
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(Spin-orbit coupling, Zeeman and Stark splitting, Jahn-Teller effect)
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72.25.Dc
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(Spin polarized transport in semiconductors)
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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
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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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