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

David E. Meltzer, F. J. Pinski, and G. M. Stocks
Phys. Rev. B 37, 6011 – Published 15 April 1988
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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.

  • Received 22 June 1987

DOI:https://doi.org/10.1103/PhysRevB.37.6011

©1988 American Physical Society

Authors & Affiliations

David E. Meltzer

  • Solid State Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831
  • Department of Physics and Astronomy, University of Tennessee, Knoxville, Tennessee 37996

F. J. Pinski and G. M. Stocks

  • Metals and Ceramics Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831

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Issue

Vol. 37, Iss. 11 — 15 April 1988

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