2011/02/27 by Svitlana Gapochenko, S. Gapochenko, Gapochenko, S. +8
Earth and Planetary Sciences · Materials Science · Physics and Astronomy · #Glass properties and applications #Mineralogy and Gemology Studies #Phase-change materials and chalcogenides #cond-mat.mtrl-sci
paper · pdf · doi:10.48550/arxiv.1102.5507
7 pages, 1 figure
arxiv created 2011/02/27 · arxiv updated 2011/03/01
Raman spectra of GexAsySe100-x-y (0 < x < 30; 10 < y < 40) glasses have been studied at room temperature. Three sets of samples were investigated; it was revealed that they are qualitatively differing by shape of their spectra. The structure model was proposed for glasses of each set. The selection of the glasses on the sets with the same structure type can be made using the formal parameter - the mean coordination number <m> (the mean number of covalent bonds per atom): i) 2.1 < <m> < 2.51 (polymeric structure); ii) 2.51 < <m> < 2.78 (molecular-cluster structure); iii) 2.78 < <m> < 3 (network structure).