Accession Number:

ADA224830

Title:

Simple Approximation for Effect of Alloying on the Phenomenological Linewidth Gamma

Descriptive Note:

Quarterly rept. no. 5

Corporate Author:

ILLINOIS UNIV CHAMPAIGN

Personal Author(s):

Report Date:

1983-01-01

Pagination or Media Count:

3.0

Abstract:

The physical significance is studied of the parameter Gamma which can be obtained by Electrolyte Electroreflectance EER or by spectroscopic ellipsometry. Results The generalized theory of electroreflectance which has been carried out under separate funding has permitted us to reconcile the Gamma obtained by electroreflectance to the Gamma obtained by ellipsometry. However, it does remain that the value of Gamma obtained either way can be as high as 120 meV as compared to the expected 70 meV. This is due to the breakdown of the virtual crustal assumption and is in fact a quantitative measure of it. It turns out that the measured Gamma sub m Gamma sub 0 kT Delta Gamma where Gamma sub m is the measured linewidth, Gamma sub 0 is the expected 70 meV and Delta Gamma measures the departure from the virtual crystal approximation. Electrolyte electroreflectance.

Subject Categories:

  • Physical Chemistry

Distribution Statement:

APPROVED FOR PUBLIC RELEASE