ELECTRONIC-STRUCTURE OF ORDERED AND DISORDERED CU-AG ALLOYS

We present a study of the electronic structure of Cu-Ag alloys. This w ork includes total-energy evaluations, band structure, and density of states (DOS) determinations using the augmented-plane-wave method for the L1(2), B1, and B2 structures. We also study the corresponding diso rdered phases of these alloys by the tight-binding coherent potential approximation. Our results confirm the B2 and L1(2) (Cu reach) as the stable structures of these systems. We compare the DOS with experiment and other calculations, and confirm the absence of both magnetism and superconductivity in these alloys. Finally we estimate charge transfe r for these alloys from Cu to Ag.