Fragility of Ge-As-Se glass-forming liquids in relation to rigidity percolation, and the Kauzmann paradox

M. Tatsumisago, B. L. Halfpap, J. L. Green, Stuart Lindsay, Charles Angell

Research output: Contribution to journalArticlepeer-review

296 Scopus citations

Abstract

The concept of mean-field rigidity percolation at average coordination number r=2.4 in covalently bonded inorganic glasses is shown to be relevant to the liquid-state behavior of glass-forming chalcogenide systems. In particular it correlates with remarkable variations in fragility and excess heat capacity which we observe in the model ternary system Ge-As-Se. Except near As2Se3, Tg itself depends only on r anywhere in the system up to r=2.5. These findings provide an important link between key structural concepts of glass science, the relaxation phenomena, and the thermodynamic problem embodied in the Kauzmann paradox.

Original languageEnglish (US)
Pages (from-to)1549-1552
Number of pages4
JournalPhysical Review Letters
Volume64
Issue number13
DOIs
StatePublished - Jan 1 1990

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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