Calculation of the density of states of NbN(x) by the recursion method

Abstract

The density of states, n(E), of NbNx has been calculated by means of the Recursion Method for x < 1. The results have been compared with experiment, obtaining that the most important trends of the density of states are reproduced fairly well, even if the variation of the density of states at the Fermi level, as a function of the concentration of Af-impurities cannot be predicted.