Transport properties in a multi-terminal regular polygonal quantum ring with Rashba spin-orbit coupling

作     者：唐翰昭 翟利学 刘建军 

作者机构：Department of Physics and Hebei Advanced Thin Film LaboratoryHebei Normal University Department of PhysicsShijiazhuang University 

出 版 物：《Chinese Physics B》 (中国物理B（英文版）)

年 卷 期：2012年第21卷第12期

页      面：66-73页

核心收录：

学科分类：07[理学] 070201[理学-理论物理] 0702[理学-物理学] 

基　　金：Project supported by the National Natural Science Foundation of China(Grant No.61176089) Hebei Provincial Natural Science Foundation,China(Grant No.A2011205092) 

主　　题：multi-terminal quantum ring Rashba spin-orbit coupling transport property 

摘      要：Transport properties in a multi-terminal regular polygonal quantum ring with Rashba spin-orbit coupling （SOC） are investigated analytically using quantum networks and the transport matrix metLod. The results show that conduc- tances 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.