Electronic Density of States in Cu-Based Alloys

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Abstract
A detailed theoretical investigation has been made of the manner in which the electronic density of states of copper changes with the introduction of dilute nonmagnetic impurities. The formalism used is exact for a single impurity in a system of muffin-tin potentials, and takes into account the detailed character of the host band structure. The impurity potential is calculated through a self-consistent procedure utilizing a generalized Friedel sum rule. The results show a marked difference from the predictions of the rigid-band model. We find that the changes in the single-particle electronic density of states are not sufficient to account for the measured changes in the linear component of the specific heat. But due to the comprehensive nature of the calculations, it is possible to conclude that the discrepancy is due to other physical effects.