Effect of spin-orbit interaction on the electronic structure of indium-antimonide $d$ bands

The bands and densities of states of d bands in indium antimonide (InSb) are determined taking into account and disregarding the spin-orbit interaction. It is established that taking into account the effect of spin-orbit interaction results also in a substantial change in the dispersion of the obtained bands instead of only in the doublet splitting of the band of core d levels at $\sim$ (0.79–0.86) eV. It is established that it is indium 4$d$ states with $e_g$ and $t_{2g}$ symmetry that give the main contribution to the density of states. The calculations are carried out by the LAPW method with the exchange-correlation potential in the generalized gradient approximation (LAPW + GGA).