Abstract
The electronic structure of disordered alloys is studied by means of the embedded-cluster approximation. An exact expression is obtained for the Green function for a cluster of atoms embedded in an effective medium described by the coherent-potential approximation (CPA) for an arbitrary number of dimensions and size of the cluster. This approach is applied to investigate local-environment effects in disordered alloys, including short-range order. Contrary to previous work, states are found outside of the CPA band.
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