Current-Induced Spin Photocurrent in GaAs at Room Temperature

Yang Zhang; Yu Liu; Xiao-Lan Xue; Xiao-Lin Zeng; Jing Wu; Li-Wei Shi; Yong-Hai Chen

doi:10.3390/s22010399

Sensors (Jan 2022)

Current-Induced Spin Photocurrent in GaAs at Room Temperature

Yang Zhang,
Yu Liu,
Xiao-Lan Xue,
Xiao-Lin Zeng,
Jing Wu,
Li-Wei Shi,
Yong-Hai Chen

Affiliations

Yang Zhang: School of Materials Science and Physics, China University of Mining and Technology, Xuzhou 221116, China
Yu Liu: Key Laboratory of Semiconductor Materials Science, Institute of Semiconductors, Chinese Academy of Sciences, Beijing Key Laboratory of Low Dimensional Semiconductor Materials and Devices, Beijing 100083, China
Xiao-Lan Xue: School of Materials Science and Physics, China University of Mining and Technology, Xuzhou 221116, China
Xiao-Lin Zeng: Key Laboratory of Semiconductor Materials Science, Institute of Semiconductors, Chinese Academy of Sciences, Beijing Key Laboratory of Low Dimensional Semiconductor Materials and Devices, Beijing 100083, China
Jing Wu: Key Laboratory of Semiconductor Materials Science, Institute of Semiconductors, Chinese Academy of Sciences, Beijing Key Laboratory of Low Dimensional Semiconductor Materials and Devices, Beijing 100083, China
Li-Wei Shi: School of Materials Science and Physics, China University of Mining and Technology, Xuzhou 221116, China
Yong-Hai Chen: Key Laboratory of Semiconductor Materials Science, Institute of Semiconductors, Chinese Academy of Sciences, Beijing Key Laboratory of Low Dimensional Semiconductor Materials and Devices, Beijing 100083, China

DOI: https://doi.org/10.3390/s22010399
Journal volume & issue: Vol. 22, no. 1
p. 399

Abstract

Read online

Circularly polarized photocurrent, observed in p-doped bulk GaAs, varies nonlinearly with the applied bias voltage at room temperature. It has been explored that this phenomenon arises from the current-induced spin polarization in GaAs. In addition, we found that the current-induced spin polarization direction of p-doped bulk GaAs grown in the (001) direction lies in the sample plane and is perpendicular to the applied electric field, which is the same as that in GaAs quantum well. This research indicates that circularly polarized photocurrent is a new optical approach to investigate the current-induced spin polarization at room temperature.

Published in Sensors

ISSN: 1424-8220 (Online)
Publisher: MDPI AG
Country of publisher: Switzerland
LCC subjects: Technology: Chemical technology
Website: http://www.mdpi.com/journal/sensors

About the journal

Abstract

Keywords