Electronic band structures and charge densities of NbC and NbN

We present nonlocal-pseudopotential calculations of the electronic band structures and charge densities of NbC and NbN. The major contribution to the charge density of the bands near the Fermi energy comes from C or N $4p$ states. The charge density for the first partially filled Nb $4d$ band and the shape of the Fermi surface for this band are also discussed.