Volume 119, Number 3, August 2017
|Number of page(s)||7|
|Section||Condensed Matter: Structural, Mechanical and Thermal Properties|
|Published online||13 October 2017|
Density controls the kinetic stability of ultrastable glasses
Laboratoire Charles Coulomb, UMR 5221 CNRS & Université de Montpellier - 34095 Montpellier, France
Received: 7 July 2017
Accepted: 18 September 2017
We use a swap Monte Carlo algorithm to numerically prepare bulk glasses with kinetic stability comparable to that of glass films produced experimentally by physical vapor deposition. By melting these systems into the liquid state, we show that some of our glasses retain their amorphous structures longer than 105 times the equilibrium structural relaxation time. This “exceptional” kinetic stability cannot be achieved for bulk glasses produced by slow cooling. We perform simulations at both constant volume and constant pressure to demonstrate that the density mismatch between the ultrastable glass and the equilibrium liquid accounts for a major part of the observed kinetic stability.
PACS: 64.70.qd – Thermodynamics and statistical mechanics / 02.70.Uu – Applications of Monte Carlo methods / 64.70.Q- – Theory and modeling of the glass transition
© EPLA, 2017
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