https://doi.org/10.1140/epjb/e2010-00074-9
Spin dynamics of Rashba-Dresselhaus two-dimensional electron systems with electron-electron interactions
Institute of Materials Physics, Hangzhou Dianzi University, Hangzhou, 310018, P.R. China
Corresponding author: liyuan@hdu.edu.cn
Received:
11
October
2009
Published online:
2
March
2010
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.
© EDP Sciences, Società Italiana di Fisica, Springer-Verlag, 2010
