Spin–orbit interaction in coupled quantum wells

doi:10.1088/1674-1056/22/1/017102

中国物理B ›› 2013, Vol. 22 ›› Issue (1): 17102-017102.doi: 10.1088/1674-1056/22/1/017102

• CONDENSED MATTER: ELECTRONIC STRUCTURE, ELECTRICAL, MAGNETIC, AND OPTICAL PROPERTIES • 上一篇下一篇

Spin–orbit interaction in coupled quantum wells

郝亚非

Physics Department, Zhejiang Normal University, Zhejiang 321004, China

收稿日期:2012-05-30 修回日期:2012-07-19 出版日期:2012-12-01 发布日期:2012-12-01
基金资助:
Project supported by the National Nature Science Foundation of China (Grant No. 61204107) and the Scientific Research Fund of Zhejiang Provincial Education Department, China (Grant No. Y201120799).

Spin–orbit interaction in coupled quantum wells

Hao Ya-Fei (郝亚非)

Physics Department, Zhejiang Normal University, Zhejiang 321004, China

Received:2012-05-30 Revised:2012-07-19 Online:2012-12-01 Published:2012-12-01
Contact: Hao Ya-Fei E-mail:haoyafei@zjnu.cn
Supported by:
Project supported by the National Nature Science Foundation of China (Grant No. 61204107) and the Scientific Research Fund of Zhejiang Provincial Education Department, China (Grant No. Y201120799).

摘要/Abstract

摘要： We theoretically investigate the spin-orbit interaction in GaAs/Al_xGa_1-xAs coupled quantum wells. We consider the contribution of the interface-related Rashba term as well as the linear and cubic Dresselhaus terms to the spin splitting. For the coupled quantum wells which bear an inherent structure inversion asymmetry, the same probability density distribution of electron in the two step quantum wells results in a large spin splitting from the interface term. If the widths of the two step quantum wells are different, the electron probability density in the wider step quantum well is considerably higher than that in the narrower one, resulting in the decrease of the spin splitting from the interface term. The results also show that the spin splitting of the coupled quantum well is not significantly larger than that of a step quantum well.

关键词: spin-orbit interaction, coupled quantum wells, spin splitting

Abstract: We theoretically investigate the spin-orbit interaction in GaAs/Al_xGa_1-xAs coupled quantum wells. We consider the contribution of the interface-related Rashba term as well as the linear and cubic Dresselhaus terms to the spin splitting. For the coupled quantum wells which bear an inherent structure inversion asymmetry, the same probability density distribution of electron in the two step quantum wells results in a large spin splitting from the interface term. If the widths of the two step quantum wells are different, the electron probability density in the wider step quantum well is considerably higher than that in the narrower one, resulting in the decrease of the spin splitting from the interface term. The results also show that the spin splitting of the coupled quantum well is not significantly larger than that of a step quantum well.

Key words: spin-orbit interaction, coupled quantum wells, spin splitting

中图分类号: (Spin-orbit coupling, Zeeman and Stark splitting, Jahn-Teller effect)

71.70.Ej

73.21.Fg (Quantum wells) 68.35.bg (Semiconductors)

郝亚非. Spin–orbit interaction in coupled quantum wells[J]. 中国物理B, 2013, 22(1): 17102-017102.

Hao Ya-Fei (郝亚非). Spin–orbit interaction in coupled quantum wells[J]. Chin. Phys. B, 2013, 22(1): 17102-017102.

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Spin–orbit interaction in coupled quantum wells

Spin–orbit interaction in coupled quantum wells

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