Spin coherence in a two-dimensional electron gas with Rashba spin-orbit interaction
- 31 May 2002
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review B
- Vol. 65 (24) , 241305
- https://doi.org/10.1103/physrevb.65.241305
Abstract
We study spin-relaxation phenomena in a two-dimensional electron gas in the presence of Rashba spin-orbit coupling. A tight-binding model including Rashba spin-orbit coupling is used to study spin relaxation and spin diffusion in a two-dimensional electron gas within Landauer-Büttiker formalism. It is shown that the spin-diffusion length is not independent of the mean free path as predicted by the motional narrowing effect. Further it is demonstrated that spin relaxation is anisotropic and can show a nonmonotonic dependence on Fermi energy due to nonparabolicity of the band.Keywords
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