Electronic structure of noble or transition metal based alloys

We study the electronic structure of dilute alloys of noble or transition metals, in a modified Slater-Koster model. The pure metal band structure is described by an interpolation scheme of hybridized tight binding and nearly free electron orbitals. The matrix elements of impurity potential between `s' basis functions are treated by a perturbation method. Within these approximations, we obtain exact formulae for the Green functions of the alloy, and for the displaced charge. We discuss specially the displaced charge, the transition matrix t , and the residual resistivity in the case of a potential localized on its own cell. We present the results of a numerical study of Cu Ni alloy.