Europhys. Lett.
Volume 76, Number 1, October 2006
Page(s) 102 - 108
Section Condensed matter: electronic structure, electrical, magnetic, and optical properties
Published online 06 September 2006
Europhys. Lett., 76 (1), pp. 102-108 (2006)
DOI: 10.1209/epl/i2006-10243-1

Non-Markovian spin relaxation in two-dimensional electron gas

M. 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.

© EDP Sciences 2006