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Transport properties in multi-terminal regular polygonal quantum ring with Rashba spin-orbit coupling |
| Tang Han-Zhao (唐翰昭)a, Zhai Li-Xue (翟利学)a, Liu Jian-Jun (刘建军)a b |
a Department of Physics and Hebei Advanced Thin Film Laboratory, Hebei Normal University, Shijiazhuang 050024, China;
b Department of Physics, Shijiazhuang University, Shijiazhuang 050035, China |
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Abstract Transport properties in multi-terminal regular polygonal quantum ring with Rashba spin-orbit coupling (SOC) are investigated analytically using quantum networks and transport matrix method. The results show that conductances remain at exactly the same values when the output leads are located at axisymmetric positions. However, for the nonaxisymmetrical case, there is a phase difference between the upper and lower arm, which leads to zero conductances appearing periodically. An isotropy of the conductance is destroyed by the Rashba SOC effect in the axisymmetric case. In addition, the position of zero conductance is regulated with the strength of the Rashba SOC.
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Received: 01 April 2012
Revised: 18 June 2012
Accepted manuscript online:
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PACS:
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03.65.Nk
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(Scattering theory)
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05.60.Gg
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(Quantum transport)
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71.70.Ej
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(Spin-orbit coupling, Zeeman and Stark splitting, Jahn-Teller effect)
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| Fund: Project supported by the National Natural Science Foundation of China (Grant No. 61176089) and Hebei Provincial Natural Science Foundation, China (Grant No. A2011205092). |
Corresponding Authors:
Liu Jian-Jun
E-mail: liujj@mail.hebtu.edu.cn
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Cite this article:
Tang Han-Zhao (唐翰昭), Zhai Li-Xue (翟利学), Liu Jian-Jun (刘建军) Transport properties in multi-terminal regular polygonal quantum ring with Rashba spin-orbit coupling 2012 Chin. Phys. B 21 120303
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