The temperature dependence of the electron Landé g-factor in bulk cubic GaN is investigated over an extremely broad temperature range from 15 K up to 500 K by time-resolved Kerr-rotation spectroscopy. The g-factor is found to be approximately constant over the full investigated temperature range. Calculations by -theory predict a negligible temperature dependence g(T) in complete agreement with the experiment as a consequence of the large band-gap and small spin orbit splitting in cubic GaN.
The interband coupling is estimated via , and the atomistic spin orbit splittings as described in Ref. 31.
Note that the same absolute temperature dependence is assumed for and in Ref. 6, corresponding to an extreme relative change of .