Thermally induced effects in evaporated chalcogenide films. II. Optical absorption

R. A. Street, R. J. Nemanich, G. A.N. Connell

Research output: Contribution to journalArticle

94 Scopus citations

Abstract

The shift of the optical-absorption edge when evaporated films are annealed at the glass-transition temperature is investigated in amorphous GeSe2, As2S3, and As2Se3, and is related to structural studies described in the previous paper. A higher density of homopolar bonds in as-evaporated films, compared to annealed films, is responsible for the difference in absorption. A model is described that evaluates the effect of homopolar bonds in terms of the absorption in off-stoichiometric bulk glasses, and a good agreement with experiment is obtained.

Original languageEnglish (US)
Pages (from-to)6915-6919
Number of pages5
JournalPhysical Review B
Volume18
Issue number12
DOIs
StatePublished - Jan 1 1978
Externally publishedYes

ASJC Scopus subject areas

  • Condensed Matter Physics

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