Tuning of tetrahedrality in a silicon potential yields a series of monatomic (Metal-like) glass formers of very high fragility

Valeria Molinero, Srikanth Sastry, Charles Angell

Research output: Contribution to journalArticle

104 Scopus citations

Abstract

We obtain monatomic glass formers in simulations by modifying the tetrahedral character in a silicon potential to explore a triple point zone between potentials favoring diamond (dc) and bcc crystals. dc crystallization is always preceded by a polyamorphic transformation of the liquid, and is frustrated when the Kauzmann temperature of the high temperature liquid intersects the liquid-liquid coexistence line. The glass forming liquids are extraordinarily fragile. Our results suggest that Si and Ge liquids may be vitrified at a pressure close to the diamond-β-tin-liquid triple point.

Original languageEnglish (US)
Article number075701
JournalPhysical Review Letters
Volume97
Issue number7
DOIs
StatePublished - Aug 22 2006

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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