| Persistent spin current in a quantum wire with weak Dresselhaus spin——orbit coupling |
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| 引用本文： | 盛威,王羿,周光辉.Persistent spin current in a quantum wire with weak Dresselhaus spin——orbit coupling[J].中国物理 B,2007,16(2):533-536. |
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| 作者姓名： | 盛威 王羿 周光辉 |
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| 作者单位： | (1)Department of Physics, Hunan Normal
University, Changsha 410081, China; (2)Department of Physics, Hunan Normal
University, Changsha 410081, China;International Centre for
Materials Physics, Chinese Academy of Sciences, Shenyang 110015, China |
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| 基金项目： | 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). |
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| 摘 要： | 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.
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| 关 键 词： | 半导体异质结 量子线 持续自旋电流 弱Dresselhaus自旋-轨道耦合 |
| 收稿时间： | 7/5/2006 12:00:00 AM |
| 修稿时间： | 2006-07-052006-08-31 |
Persistent spin current in a quantum wire with weak Dresselhaus spin--orbit coupling |
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| Sheng Wei,Wang Yi and Zhou Guang-Hui.Persistent spin current in a quantum wire with weak Dresselhaus spin--orbit coupling[J].Chinese Physics B,2007,16(2):533-536. |
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| Authors: | Sheng Wei Wang Yi and Zhou Guang-Hui |
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| Institution: | Department of Physics, Hunan Normal University, Changsha 410081, China; International Centre for Materials Physics, Chinese Academy of Sciences, Shenyang 110015, China |
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| 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. |
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| Keywords: | semiconductor heterojunction quantum wire Dresslhuaus spin--orbit coupling spin current |
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