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 language | English (US) |
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Article number | 075701 |
Journal | Physical Review Letters |
Volume | 97 |
Issue number | 7 |
DOIs | |
State | Published - 2006 |
ASJC Scopus subject areas
- Physics and Astronomy(all)