Raman spectra of GexAsySe100-x-y glasses

Details Raman spectra of GexAsySe100-x-y glasses Raman spectra of GexAsySe100-x-y glasses

2011-02-27

arxiv.org/abs/1102.5507v1

Physics

Condensed Matter

Materials Science

7 pages, 1 figure

Scientific paper

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 (the mean number of covalent bonds per atom): i) 2.1 < < 2.51 (polymeric structure); ii) 2.51 < < 2.78 (molecular-cluster structure); iii) 2.78 < < 3 (network structure).

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