Rare-gas impurities in alkali metals: Relation to optical absorption

David E. Meltzer, F. J. Pinski, G. M. Stocks

Research output: Contribution to journalArticle

2 Scopus citations

Abstract

An investigation of the nature of rare-gas impurity potentials in alkali metals is performed. Results of calculations based on simple models are presented, which suggest the possibility of resonance phenomena. These could lead to widely varying values for the exponents which describe the shape of the optical-absorption spectrum at threshold in the MahanNozièresde Dominicis theory. Detailed numerical calculations are then performed with the Korringa-Kohn-Rostoker coherent-potential-approximation method. The results of these highly realistic calculations show no evidence for the resonance phenomena, and lead to predictions for the shape of the spectra which are in contradiction to observations. Absorption and emission spectra are calculated for two of the systems studied, and their relation to experimental data is discussed.

Original languageEnglish (US)
Pages (from-to)6011-6018
Number of pages8
JournalPhysical Review B
Volume37
Issue number11
DOIs
StatePublished - Jan 1 1988
Externally publishedYes

ASJC Scopus subject areas

  • Condensed Matter Physics

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