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Theory of the Auger Spectra of Narrow‐Band Metals with Impurities
Author(s) -
Drchal V.,
Kudrnovský J.
Publication year - 1981
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.2221080247
Subject(s) - impurity , auger , spectral line , atomic physics , condensed matter physics , electron , spectrum (functional analysis) , crystal (programming language) , electronic band structure , auger effect , physics , chemistry , quantum mechanics , computer science , programming language
The intraatomic CVV Auger spectrum for a single impurity in a perfect crystal with an initially filled band is investigated. The impurity is characterized by its atomic level Δ and the contact pair interaction U of electrons (Wolff‐Clogston model). The exact solution of the problem is found. The spectrum may consist of three parts: (i) band of the two‐hole extended states, (ii) isolated localized two‐hole states, and (iii) band of mixed two‐hole states, in which one hole is localized, and the other one is in an extended state. The band of extended states is present in all cases, the localized and mixed states appear simultaneously for a certain value of |Δ|. The condition for the existence of bound states is derived, and the theory is numerically illustrated for a simple bandstructure model.