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Chin. Phys. B, 2013, Vol. 22(1): 017102    DOI: 10.1088/1674-1056/22/1/017102
CONDENSED MATTER: ELECTRONIC STRUCTURE, ELECTRICAL, MAGNETIC, AND OPTICAL PROPERTIES Prev   Next  

Spin–orbit interaction in coupled quantum wells

Hao Ya-Fei
Physics Department, Zhejiang Normal University, Zhejiang 321004, China
Abstract  We theoretically investigate the spin-orbit interaction in GaAs/AlxGa1-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.
Keywords:  spin-orbit interaction      coupled quantum wells      spin splitting  
Received:  30 May 2012      Revised:  19 July 2012      Published:  01 December 2012
PACS:  71.70.Ej (Spin-orbit coupling, Zeeman and Stark splitting, Jahn-Teller effect)  
  73.21.Fg (Quantum wells)  
  68.35.bg (Semiconductors)  
Fund: 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).
Corresponding Authors:  Hao Ya-Fei     E-mail:  haoyafei@zjnu.cn

Cite this article: 

Hao Ya-Fei Spin–orbit interaction in coupled quantum wells 2013 Chin. Phys. B 22 017102

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