INFLUENCE OF ELECTRON CORRELATIONS ON AUGER-SPECTRA OF SOLIDS WITH PARTIALLY FILLED BANDS

Autor(en): POTTHOFF, M
BRAUN, J
BORSTEL, G
NOLTING, W
Stichwörter: APPEARANCE-POTENTIAL SPECTROSCOPY; METALS; Spectroscopy
Erscheinungsdatum: 1995
Herausgeber: ELSEVIER SCIENCE BV
Journal: JOURNAL OF ELECTRON SPECTROSCOPY AND RELATED PHENOMENA
Volumen: 72
Startseite: 163
Seitenende: 167
Zusammenfassung: 
We investigate the influence of correlations among the valence-band electrons as well as correlations between valence-band and core electrons on the Auger line shape of solids. For metals with partially filled valence bands the relevant many-body problem is no longer exactly solvable. Usually, approximate solutions are constructed that correctly reproduce different exactly solvable limiting cases. We employ a diagrammatic vertex-correction method (three-particle ladder approximation) to calculate the three-particle Green function, which directly yields the Auger intensity. The validity of the approximation in limiting cases is discussed. It turns out that the three-particle ladder approximation gives correct results not only for those cases considered commonly but also for another limiting case: the limit of strong valence-band-core interaction. Numerical results for a model system indicate the approximation to be a very reasonable interpolation between the different limits.
Beschreibung: 
3rd International Workshop on Auger Spectroscopy and Electronic Structure (IWASES III), UNIV LIVERPOOL, LIVERPOOL, ENGLAND, SEP 04-08, 1994
ISSN: 03682048
DOI: 10.1016/0368-2048(94)02315-8

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