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Advances in Condensed Matter Physics
Volume 2008, Article ID 152731, 5 pages
http://dx.doi.org/10.1155/2008/152731
Research Article

Spin Accumulation in a Quantum Wire with Rashba Spin-Orbit Coupling

1Department of Physics, Hunan Normal University, Changsha, Hunan 410081, China
2Department of Electronics and Physics, Hunan College of Science and Engineering, Yongzhou, Hunan 425100, China

Received 22 September 2008; Revised 9 December 2008; Accepted 17 December 2008

Academic Editor: Yuri Galperin

Copyright © 2008 Xi Fu et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

We investigate theoretically the spin accumulation in a Rashba spin-orbit coupling quantum wire. Using the scattering matrix approach within the effective free-electron approximation, we have demonstrated the three components of spin polarization. It is found that by a few numerical examples, the two peaks for the out-of-plane spin accumulation shift to the edges of quantum wire with the increase of propagation modes. The period of intrinsic oscillations inversely proportions to the Rashba SOC strength. This effect may be used to differentiate the intrinsic spin accumulation from the extrinsic one.