Persistent Spin Current in a Quantum Wire with Weak Rashba Spin--Orbit Coupling
WANG Yi1, SHENG Wei1, ZHOU Guang-Hui1,2
1Department of Physics, Hunan Normal University, Changsha 410081
2International Center for Materials Physics, Chinese Academy of Sciences, Shenyang 110015
Persistent Spin Current in a Quantum Wire with Weak Rashba Spin--Orbit Coupling
WANG Yi1;SHENG Wei1;ZHOU Guang-Hui1,2
1Department of Physics, Hunan Normal University, Changsha 410081
2International Center for Materials Physics, Chinese Academy of Sciences, Shenyang 110015
Abstract： 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.
(Spin-orbit coupling, Zeeman and Stark splitting, Jahn-Teller effect)
引用本文:
WANG Yi;SHENG Wei;ZHOU Guang-Hui;. Persistent Spin Current in a Quantum Wire with Weak Rashba Spin--Orbit Coupling[J]. 中国物理快报, 2006, 23(11): 3065-3068.
WANG Yi, SHENG Wei, ZHOU Guang-Hui,. Persistent Spin Current in a Quantum Wire with Weak Rashba Spin--Orbit Coupling. Chin. Phys. Lett., 2006, 23(11): 3065-3068.
2006, Vol. 23 
