Correlations of the nonexponentiality and state dependence of mechanical relaxations with bond connectivity in Ge-As-Se supercooled liquids

Roland Böhmer, Charles Angell

Research output: Contribution to journalArticle

426 Scopus citations

Abstract

We have studied the mechanical responses of supercooled Ge-As-Se liquids to flexural strains and temperature steps. The departures from exponential relaxation correlate well with the variations in connectivity. The structural state dependence of the mechanical relaxation, detected in pure and weakly cross-linked Se, is suppressed completely at the rigidity percolation threshold rc, where the liquid fragility is a minimum. The shapes of the decay functions of samples with the same rcbut different compositions are not universal at Tg probably because of chemical effects near the binary edges of the ternary system.

Original languageEnglish (US)
Pages (from-to)10091-10094
Number of pages4
JournalPhysical Review B
Volume45
Issue number17
DOIs
StatePublished - Jan 1 1992

ASJC Scopus subject areas

  • Condensed Matter Physics

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