Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
7900535 | Journal of Non-Crystalline Solids | 2018 | 6 Pages |
Abstract
Atomic processes giving rise to the photoinduced fluidity have been studied for amorphous selenium. Ab initio molecular orbital calculations of Se clusters suggest that distorted atomic structures such as curled and intersecting chains have smaller optical gaps. Those atomic sites are likely to be excited by subgap (Urbach-edge) light, which undergo structural relaxation including bond breakages and interchanges. Such photo-electro-structural transformations could originate the macroscopic fluidity. Possibility of electronic glass-transition is also discussed.
Related Topics
Physical Sciences and Engineering
Materials Science
Ceramics and Composites
Authors
Keiji Tanaka, Koichi Shimakawa,