| Original Articles |
|
|
|
|
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 |
|
| Cite this article: |
|
WANG Yi, SHENG Wei, ZHOU Guang-Hui 2006 Chin. Phys. Lett. 23 3065-3068 |
|
|
|
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.
|
| Keywords:
73.23.-b
73.63.Nm
71.70.Ej
|
|
|
Published: 01 November 2006
|
|
| PACS: |
73.23.-b
|
(Electronic transport in mesoscopic systems)
|
| |
73.63.Nm
|
(Quantum wires)
|
| |
71.70.Ej
|
(Spin-orbit coupling, Zeeman and Stark splitting, Jahn-Teller effect)
|
|
|
|
|
|
|
Viewed |
|
|
|
Full text
|
|
|
|
|
Abstract
|
|
|
|
|
