Document Type

Article

Publication Date

12-1975

Journal or Book Title

Physical Review B

Volume

12

Issue

12

First Page

5615

Last Page

5621

DOI

10.1103/PhysRevB.12.5615

Abstract

The absorptances of Al and alloys of up to 5.5 at.% of Li and Mg in Al were measured at 4.2 K in the 0.2-3.0-eV range. The theory of Ashcroft and Sturm was fitted to the data. The fit obtained is reasonably good, provided three relaxation times are used, one for the Drude term and one for each type of transition between parallel bands. The fit is slightly better for the more concentrated alloys. In all cases the discrepancy between the fit and the data is greatest in the region between the two interband peaks in the optical conductivity, and known extensions to the theory do not qualitatively improve the fit. Pseudopotential Fourier coefficients U200 and U111 obtained from the fits vary with solute type and concentration. The variation can be explained semiquantitatively with a virtual-crystal pseudopotential.

Comments

This article is from Physical Review B 12 (1975): 5615, doi:10.1103/PhysRevB.12.5615. Posted with permission.

Copyright Owner

The American Physical Society

Language

en

File Format

application/pdf

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