Abstract
Typical methods used in the theory of substitutional disorder are single-site approximations like the coherent potential approximation, which cannot properly describe effects of short range order. We propose a new approximation for the configurationally averaged single particle Green's function, which should allow for a systematic description of such effects.
We restrict to diagonal disorder and in particular discuss the electronic properties of a binary single band alloy.
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Nowak, E., Capellmann, H. Towards a systematic description of short range order: Diagonal disorder in a substitutional alloy. Z. Physik B - Condensed Matter 57, 1–5 (1984). https://doi.org/10.1007/BF01679919
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DOI: https://doi.org/10.1007/BF01679919