We report our theoretically investigation on the spin-orbit coupling and g-factor of the X-valley in cubic GaN. We find that the spin-orbit coupling coefficient from sp3d5s∗ tight-binding model is 0.029\,eV⋅{\AA}, which is comparable with that in cubic GaAs. By employing the k⋅p theory, we find that the g-factor in this case is only slightly different from the free electron g-factor. These results are expected to be important for the on-going study on spin dynamics far away from equilibrium in cubic GaN.
@article{arxiv.1108.2059,
title = {Spin-orbit coupling and $g$-factor of $X$-valley in cubic GaN},
author = {K. Shen and J. Y. Fu and M. W. Wu},
journal= {arXiv preprint arXiv:1108.2059},
year = {2011}
}