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- W2766472571 startingPage "173101" @default.
- W2766472571 abstract "The time-resolved Raman measurements reveal a three-stage mechanism of the photostructural changes in Ge25.0Ga9.5Sb0.5S65.0 (containing 0.5 at. % of Er3+) glass under continuous-above-bandgap illumination. These changes are reversible and effectively athermal, in that the local temperature rises to about 60% of the glass-transition temperature and the phase transitions take place in the glass/crystal and not in an equilibrium liquid. In the early stages of illumination, the glassy-network dimensionality changes from a predominantly 3-D to a mixture of 2-D/1-D represented by an increase in the fraction of edge-sharing tetrahedra and the emergence of homonuclear (semi)metallic bonds. This incubation period of the structural rearrangements, weakly thermally activated with an energy of ∼0.16 eV, facilitates a reversible photocrystallization. The photocrystallization rate in the glass is comparable to that achieved by thermal crystallization from supercooled liquid at large supercooling. Almost complete re-amo..." @default.
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- W2766472571 date "2017-11-01" @default.
- W2766472571 modified "2023-10-16" @default.
- W2766472571 title "In-situ study of athermal reversible photocrystallization in a chalcogenide glass" @default.
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- W2766472571 doi "https://doi.org/10.17863/cam.17953" @default.
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