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Photo-induced volume changes in selenium. Tight-binding molecular dynamics study | J. Hegedus
; K Kohary
; S. Kugler
; K. Shimakawa
; | Date: |
27 Dec 2003 | Subject: | Disordered Systems and Neural Networks | cond-mat.dis-nn | Abstract: | Tight-binding molecular dynamics simulations of photo-excitations in small Se clusters (isolated Se$_8$ ring and helical Se chain) and glassy Se networks (containing 162 atoms) were carried out in order to analyse the photo induced instability inside the amorphous selenium. In the cluster systems after taking an electron from the highest occupied molecular orbital to the lowest unoccupied molecular orbital a bond breaking occurs. In the glassy networks photoinduced volume expansion was observed and at the same time the number of coordination defects changed significantly due to illumination. | Source: | arXiv, cond-mat/0401556 | Services: | Forum | Review | PDF | Favorites |
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