Search for a structural response to the intermediate phase in Gex Se1-x glasses

Moneeb T M Shatnawi, Christopher L. Farrow, Ping Chen, Punit Boolchand, Asel Sartbaeva, Michael Thorpe, Simon J L Billinge

Research output: Contribution to journalArticlepeer-review

57 Scopus citations

Abstract

Atomic pair distribution functions (PDFs) obtained from high energy x-ray synchrotron radiation and x-ray absorption fine structure measurements were performed on 18 closely spaced compositions of chalcogenide glasses (Gex Se1-x with 0.15≤x≤0.40), which span the range of the floppy to rigid phase transition in these glasses. Structural parameters such as PDF peak widths, Debye-Waller factors from extended x-ray absorption fine structure, and the first sharp diffraction peak in S (Q) were extracted as a function of composition. These parameters smoothly evolve with composition, but there are no clear discontinuities or breaks in the slope associated with the appearance of the intermediate phase (IP). Therefore, these measurements do not confirm a structural origin for the IP.

Original languageEnglish (US)
Article number094134
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume77
Issue number9
DOIs
StatePublished - Mar 26 2008

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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