Competition between Spin-Orbit Interaction and Zeeman Coupling in Rashba   2DEGs
  We investigate systematically how the interplay between Rashba spin-orbit interaction and Zeeman coupling affects the electron transport and the spin dynamics in InGaAs-based 2D electron gases. From the quantitative analysis of the magnetoconductance, measured in the presence of an in-plane magnetic field, we conclude that this interplay results in a spin-induced breaking of time reversal symmetry and in an enhancement of the spin relaxation time. Both effects, due to a partial alignment of the electron spin along the applied magnetic field, are found to be in excellent agreement with recent theoretical predictions. 
F.E. Meijer, A.F. Morpurgo, T.M. Klapwijk, T. Koga, and J. Nitta