0701195 (Baoli Liu et al.)

Electron Density Dependence of in-plane Spin Relaxation Anisotropy in
GaAs/AlGaAs Two-Dimensional Electron Gas    [PDF]

Baoli Liu, Hongming Zhao, Jia Wang, Linsheng Liu, Wenxin Wang, Haijun Zhu, Dongmin Chen

We investigated the spin dynamics of two-dimensional electrons in (001) GaAs/AlGaAs heterostructure using the time resolved Kerr rotation technique under a transverse magnetic field. The in-plane spin lifetime is found to be anisotropic below 150k due to the interference of Rashba and Dresselhaus spin-orbit coupling and D'yakonov-Perel' spin relaxation. The ratio of in-plane spin lifetimes is measured directly as a function of temperature and pump power, showing that the electron density in 2DEG channel strongly affects the Rashba spin-orbit coupling.

View original: http://arxiv.org/abs/0701195