Ideal glass states are not purely vibrational: Insight from randomly pinned glasses

Abstract

We use computer simulations to probe the thermodynamic and dynamic properties of a glass-former that undergoes an ideal glass-transition because of the presence of randomly pinned particles. We find that even deep in the equilibrium glass state the system relaxes to some extent because of the presence of localized excitations that allow the system to access different inherent structures, giving thus rise to a non-trivial contribution to the entropy. By calculating with high accuracy the vibrational part of the entropy, we show that also in the equilibrium glass state thermodynamics and dynamics give a coherent picture and that glasses should not be seen as a disordered solid in which the particles undergo just vibrational motion but instead as a system with a highly nonlinear internal dynamics.

Published version

References in corpus (3)

• Theoretical perspective on the glass transition and amorphous materials
• Supercooled Liquids for Pedestrians
• Experimental Determination of Configurational Entropy in a Two-Dimensional Liquid under Random Pinning

Cited by in corpus (14)

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• Creating bulk ultrastable glasses by random particle bonding
• Effect of pinning on the yielding transition of amorphous solids
• Anharmonic properties of vibrational excitations in amorphous solids
• Computer simulations of the glass transition and glassy materials
• Low-Frequency Vibrational States in Ideal Glasses with Random Pinning
• Thermodynamics and its correlation with dynamics in a mean-field model and pinned systems: A comparative study using two different methods of entropy calculation
• Creating equilibrium glassy states via random particle bonding
• Intermittent rearrangements accompanying thermal fluctuations distinguish glasses from crystals
• Significance of the nature of disorder on the universal features of the spatio-temporal correlations of two-dimensional Coulomb-clusters
• Computational Methods toward Ultrastable Glasses