The electronic structure of CuPd alloys: An augmented space cluster CPA approach

The conventional tight-binding single site coherent potential approaches are known to fail in dealing with alloys with dominant off diagonal disorder. We develop here a cluster coherent potential approximation within the augmented space scheme. The formalism is a basis for application with the LMTO based first principles tight-binding type methods. It is shown to work well for a tight-binding calculation for CuPd alloys. (author). 19 refs, 2 figs