Spin–orbit coupling in bulk GaAs

We study the spin–orbit coupling in the whole Brillouin zone for GaAs using both the sp3s*d5sp3s*d5 and sp3s*sp3s* nearest-neighbor tight-binding models. In the ΓΓ-valley, the spin splitting obtained is in good agreement with experimental data. We then further explicitly present the coefficients of the spin splitting in GaAs L- and X-valleys. These results are important to the realization of spintronic device and the investigation of spin dynamics far away from equilibrium.