1987
DOI: 10.1002/pssb.2221410115
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Material Constants of Composites. II. An Improvement over the Coherent Potential Approximation for Crystals with Site‐Diagonal Disorder

Abstract: It is shown that the coherent potential approximation violates a fundamental requirement, called additivity in a previous work. A new approximation for the calculation of the self-energy of crystals with site-diagonal disorder is proposed, which interpolates between the two dilute limits of the average t-matrix approximation and fulfils the requirement of additivity.Es wird gezeigt, daB die ,,coherent potential"-n'aherung eine fundamentale Forderung verletzt, die in einer vorhergehenden Arbeit Additivitat gena… Show more

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