DOI

For the first time, the Raman spectra of bulk SexTe1-x glasses, 0.5 ≤ x ≤ 1.0, have been measured over the entire glass-forming range. The spectra exhibit three broad spectral features between 150 and 300 cm-1, attributed to Te-Te, Se-Te, and Se-Se stretching modes according to DFT simulations. The observed weak chemical ordering in the glasses is discussed on the basis of heteropolar and homopolar bond fractions derived from integrated intensity of the Raman modes and DFT cross-sections. The underlying structural model of the glasses suggests a random distribution of the Se-Se, Se-Te, and Te-Te chemical bonds with some preference for heteropolar bonding within Se-Te-Se structural units.

Original languageEnglish
Pages (from-to)5188-5197
Number of pages10
JournalJournal of the American Ceramic Society
Volume101
Issue number11
DOIs
StatePublished - Nov 2018

    Scopus subject areas

  • Ceramics and Composites
  • Geochemistry and Petrology
  • Materials Chemistry
  • Geology

    Research areas

  • Chemical ordering in the glassy state, DFT modeling, Raman spectroscopy, SeTe glasses, Se Te glasses, chemical ordering in the glassy state, SexTe1-x glasses, SYSTEM, CRYSTAL-STRUCTURE, SE-77, DENSITY, TELLURIUM, THIN-FILM ALLOYS, NMR, SPECTRA, AMORPHOUS SELENIUM, SCATTERING

ID: 32901834