Non-linear dynamic response of glass-forming liquids to random pinning
Disordered Systems and Neural Networks
2014-12-17 v1 Materials Science
Statistical Mechanics
Abstract
We use large scale computer simulations of a glass-forming liquid in which a fraction c of the particles has been permanently pinned. We find that the relaxation dynamics shows an exponential dependence on c. This result can be rationalized by means of a simple theoretical Ansatz and we discuss its implication for thermodynamic theories for the glass-transition. For intermediate and low temperatures we find that the slowing down of the dynamics due to the pinning saturates and that the cooperativity decreases with increasing c, results which indicate that in glass-forming liquids there is a dynamic crossover at which the shape of the relaxing entities changes.
Keywords
Cite
@article{arxiv.1403.3519,
title = {Non-linear dynamic response of glass-forming liquids to random pinning},
author = {Walter Kob and Daniele Coslovich},
journal= {arXiv preprint arXiv:1403.3519},
year = {2014}
}