Sharp rigid to floppy phase transition induced by dangling ends in a network glass

Y. Wang, J. Wells, D. G. Georgiev, P. Boolchand, Koblar Jackson, M. Micoulaut

Research output: Contribution to journalArticlepeer-review

Abstract

The count of Lagrangian bonding constraints nc(y) in ternary Ge35S75-yIy glasses (0 < y < 0.30) is established from the molecular structure using Raman scattering and first-principles cluster calculations. The results show that nc(y) decreases to 3 as y increases close to yc = 0.162(3), where a sharply defined global minimum in the nonreversing heat flow, ΔHnr(y) near Tg, is observed in scanning calorimetry. Here we have a rigidity transition induced by I dangling ends, with its sharpness resulting from the absence of self-organization in the random network.

Original languageEnglish
Pages (from-to)185503-1-185503-4
JournalPhysical Review Letters
Volume87
Issue number18
DOIs
StatePublished - 2001
Externally publishedYes

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