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 language | English (US) |
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Pages (from-to) | 6915-6919 |
Number of pages | 5 |
Journal | Physical Review B |
Volume | 18 |
Issue number | 12 |
DOIs | |
State | Published - 1978 |
Externally published | Yes |
ASJC Scopus subject areas
- Condensed Matter Physics