Persistent Spin Current in a Quantum Wire with Weak Rashba Spin-Orbit Coupling  

作　　者：王羿 盛威 周光辉 

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

出　　处：《Chinese Physics Letters》2006年第11期3065-3068,共4页中国物理快报（英文版）

基　　金：Supported by the National Natural Science Foundation of China under Grant No 10574042, and the Natural Science Foundation of Hunan Province under Grant No 06JJ2097.

摘　　要：We theoretically investigate the spin current for a parabolically confined semiconductor heterojunction quantum wire with weak Rashba spin-orbit coupling by means of the perturbation method. By analytical calculation, it is found that only two components of spin current density is non-zero in the equilibrium case. Numerical examples have demonstrated that the spin current of electron transverse motion is 10^-3 times that of electron longitudinal motion. However, the former one is much more sensitive to the strength of Rashba spin-orbit coupling. These results may suggest an approach to the spin storage device and to the measurement of spin current through its induced electric field.We theoretically investigate the spin current for a parabolically confined semiconductor heterojunction quantum wire with weak Rashba spin-orbit coupling by means of the perturbation method. By analytical calculation, it is found that only two components of spin current density is non-zero in the equilibrium case. Numerical examples have demonstrated that the spin current of electron transverse motion is 10^-3 times that of electron longitudinal motion. However, the former one is much more sensitive to the strength of Rashba spin-orbit coupling. These results may suggest an approach to the spin storage device and to the measurement of spin current through its induced electric field.

关 键 词：SPINTRONICS CONDUCTANCE 

分 类 号：O562[理学—原子与分子物理] O413[理学—物理]