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Photoinduced volume changes in amorphous selenium.

Abstract:

We have modeled the photoinduced volume change in amorphous selenium. After photon absorption, we treated the excited electron and hole independently within the framework of the tight-binding formalism. We found covalent bond breaking in amorphous networks with photoinduced excited electrons, whereas excited holes contribute to the formation of interchain bonds. We also observed a correlated volume change of the amorphous samples. Our results provide a new and universal description, which can...

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Publication status:
Published

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Authors


Hegedüs, J More by this author
More by this author
Institution:
University of Oxford
Department:
Oxford, MPLS, Materials
Pettifor, DG More by this author
Shimakawa, K More by this author
Journal:
Physical review letters
Volume:
95
Issue:
20
Pages:
206803
Publication date:
2005-11-05
DOI:
EISSN:
1079-7114
ISSN:
0031-9007
URN:
uuid:32d2b566-aeb5-4c84-abbe-0e3cb6411fc6
Source identifiers:
25487
Local pid:
pubs:25487
Language:
English

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