Persistent spin current in a quantum wire with weak Dresselhaus spin--orbit coupling
Sheng Wei(盛威)a), Wang Yi(王羿)a), and Zhou Guang-Hui(周光辉)a)b)†
a Department of Physics, Hunan Normal University, Changsha 410081, China; b International Centre for Materials Physics, Chinese Academy of Sciences, Shenyang 110015, China
Abstract The spin current in a parabolically confined semiconductor heterojunction quantum wire with Dresselhaus spin--orbit coupling is theoretically studied by using the perturbation method. The formulae of the elements for linear and angular spin current densities are derived by using the recent definition for spin current based on spin continuity equation. It is found that the spin current in this Dresselhaus spin--orbit coupling quantum wire is antisymmetrical, which is different from that in Rashba model due to the difference in symmetry between these two models. Some numerical examples for the result are also demonstrated and discussed.
Received: 05 July 2006
Revised: 31 August 2006
Accepted manuscript online:
Fund: Project supported by the National
Natural Science Foundation of China (Grant No 10574042) and the
Scientific Research Fund of Hunan Provincial
Education Department (Grant No 04A031).
Cite this article:
Sheng Wei(盛威), Wang Yi(王羿), and Zhou Guang-Hui(周光辉) Persistent spin current in a quantum wire with weak Dresselhaus spin--orbit coupling 2007 Chinese Physics 16 533
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