SEMI OpenIR  > 中国科学院半导体研究所(2009年前)
Effect of a step quantum well structure and an electric-field on the Rashba spin splitting
Hao Yafei; Chen Yonghai; Hao Guodong; Wang Zhanguo
2009
Source Publication半导体学报
Volume30Issue:6Pages:11-14
AbstractSpin splitting of conduction subbands in Al_(0.3)Ga_(0.7)As/GaAs/Al_xGa_(1-x)As/Al_(0.3)Ga_(0.7)As step quantum wells induced by interface and electric field related Rashba effects is investigated theoretically by the method of finite difference. The dependence of the spin splitting on the electric field and the well structure, which is controlled by the well width and the step width, is investigated in detail. Without an external electric field, the spin splitting is induced by an in terface related Rashba term due to the built-in structure inversion asymmetry. Applying the external electric field to the step QW, the Rashba effect can be enhanced or weakened, depending on the well structure as well as the direction and the magnitude of the electric field. The spin splitting is mainly controlled by the interface related Rashba term under a negative and a stronger positive electric field, and the contribution of the electric field related Rashba term dominates in a small range of a weaker positive electric field.A method to determine the interface parameter is proposed.The results show that the step QWs might be used as spin switches.
metadata_83institute of semiconductors,chinese academy of sciences
Subject Area半导体材料
Funding Organizationthe State Key Development Program for Basic Research of China,the National Natural Science Foundation of China
Indexed ByCSCD
Language英语
CSCD IDCSCD:3599561
Date Available2010-11-23
Citation statistics
Document Type期刊论文
Identifierhttp://ir.semi.ac.cn/handle/172111/15761
Collection中国科学院半导体研究所(2009年前)
Recommended Citation
GB/T 7714
Hao Yafei,Chen Yonghai,Hao Guodong,et al. Effect of a step quantum well structure and an electric-field on the Rashba spin splitting[J]. 半导体学报,2009,30(6):11-14.
APA Hao Yafei,Chen Yonghai,Hao Guodong,&Wang Zhanguo.(2009).Effect of a step quantum well structure and an electric-field on the Rashba spin splitting.半导体学报,30(6),11-14.
MLA Hao Yafei,et al."Effect of a step quantum well structure and an electric-field on the Rashba spin splitting".半导体学报 30.6(2009):11-14.
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