Pseudopotential Calculations of the Electronic Structure of a Transition-Metal Compound-Niobium Nitride

The electronic band structure, density of states, and ${\epsilon }_2\left(\omega \right)$, the imaginary part of the dielectric constant, are calculated for niobium nitride using the empirical-pseudopotential method. The results are compared with non-self-consistent and with the self-consistent augmented-plane-wave calculations. A discussion of the Fermi surface is included.