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Theory of auger spectra from disordered alloys the effect of electron correlations in filled narrow bands
Author(s) -
Drchal V.,
Kudrnovský J.
Publication year - 1982
Publication title -
physica status solidi (b)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.51
H-Index - 109
eISSN - 1521-3951
pISSN - 0370-1972
DOI - 10.1002/pssb.2221140240
Subject(s) - randomness , auger , spectral line , coherent potential approximation , electron , scaling , hubbard model , valence electron , core electron , condensed matter physics , atomic physics , physics , valence (chemistry) , quantum mechanics , electronic structure , molecular physics , mathematics , statistics , geometry , superconductivity
The theory of the intraatomic core‐valence‐valence Auger spectra from a substitutionally disordered alloy with an initially filled narrow band is formulated within the coherent‐potential approximation in the space of the two‐hole states. The constituent atoms are characterized by their atomic levels Δ and the contact pair interactions U between two electrons (Hubbard model). The exact solution to the problem is found for a particular case with randomness in the pair interactions only. Results of numerical analysis for a simple model based on the scaling‐factor approximation are given to illustrate the basic features of the theory.