Persistent spin current in a quantum wire with weak Dresselhaus spin-orbit coupling  

作　　者：盛威 王羿 周光辉 

机构地区：[1]Department of Physics, Hunan Normal University, Changsha 410081, China [2]International Centre for Materials Physics, Chinese Academy of Sciences, Shenyang 110015, China

出　　处：《Chinese Physics B》2007年第2期533-536,共4页中国物理B（英文版）

基　　金：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）.

摘　　要：The spin current in a parabolically confined semiconductor hcterojunction quantum wire with Drcsselhaus spinorbit 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.The spin current in a parabolically confined semiconductor hcterojunction quantum wire with Drcsselhaus spinorbit 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.

关 键 词：semiconductor heterojunction quantum wire Dresslhuaus spin-orbit coupling spin current 

分 类 号：TN201[电子电信—物理电子学]