2024-03-28T17:11:46Zhttps://eprints.lib.hokudai.ac.jp/dspace-oai/requestoai:eprints.lib.hokudai.ac.jp:2115/766422022-11-17T02:08:08Zhdl_2115_20045hdl_2115_139Mechanisms of photoinduced fluidity in chalcogenide glasses: Molecular orbital analysesTanaka, KeijiShimakawa, KoichiSePhotoinducedViscosityGAMESSDangling bond501Atomic 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.ElsevierJournal Articleapplication/pdfhttp://hdl.handle.net/2115/76642https://eprints.lib.hokudai.ac.jp/dspace/bitstream/2115/76642/1/Tanaka-Shimakawa.pdf0022-3093Journal of Non-Crystalline Solids4815795842018-02-01enginfo:doi/10.1016/j.jnoncrysol.2017.12.005© 2018. This manuscript version is made available under the CC-BY-NC-ND 4.0 license http://creativecommons.org/licenses/by-nc-nd/4.0/author