Non-Markovian spin relaxation in two-dimensional electron gasM. M. Glazov1 and E. Ya. Sherman2
1 A. F. Ioffe Physico-Technical Institute, Russian Academy of Sciences 194021 St. Petersburg, Russia
2 Department of Physics and Institute for Optical Sciences, University of Toronto 60 St. George Street, Toronto, Ontario, Canada M5S 1A7
received 5 July 2006; accepted in final form 16 August 2006
published online 6 September 2006
We analyze by Monte Carlo simulations and analytically the spin dynamics of a two-dimensional electron gas (2DEG) interacting with short-range scatterers in nonquantizing magnetic fields. It is shown that the spin dynamics is non-Markovian with the exponential spin relaxation followed by an oscillating tail due to the electrons residing on closed trajectories. The tail relaxes on a long time scale due to an additional smooth random potential and inelastic processes. The developed analytical theory and Monte-Carlo simulations are in quantitative agreement with each other.
72.25.Rb - Spin relaxation and scattering.
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