Spin dynamics of Rashba-Dresselhaus two-dimensional electron systems with electron-electron interactions

Y. Li () and J.-X. Chen

The European Physical Journal B: Condensed Matter and Complex Systems, 2010, vol. 74, issue 1, 129-133

Abstract: Spin dynamics of Rashba-Dresselhaus two-dimensional electron systems is studied by taking account of electron-electron interactions under the D’yakonov-Perel’ mechanism. The diffusion equations for charge and spin densities are obtained through decoupling of the interactions using the auxiliary Bose field. We show that the electron-electron interaction has no effect on the infinite spin lifetime when the Rashba and Dresselhaus coupling constants satisfy the condition α=±β. If the general condition α≠±β is satisfied, the spin lifetime is finite and enhanced by the electron-electron interaction with the increment of the temperature in the ballistic regime. The increasing amplitude of the spin lifetime depends on the ratio of the temperature to the Fermi temperature. Copyright EDP Sciences, SIF, Springer-Verlag Berlin Heidelberg 2010

Date: 2010
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DOI: 10.1140/epjb/e2010-00074-9

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