Strong geometric frustration in model glassformers
Abstract
We consider three popular model glassformers, the Kob-Andersen and Wahnstr\"om binary Lennard-Jones models and weakly polydisperse hard spheres. Although these systems exhibit a range of fragilities, all feature a rather similar behaviour in their local structure approaching dynamic arrest. In particular we use the dynamic topological cluster classification to extract a locally favoured structure which is particular to each system. These structures form percolating networks, however in all cases there is a strong decoupling between structural and dynamic lengthscales. We suggest that the lack of growth of the structural lengthscale may be related to strong geometric frustration.
Cite
@article{arxiv.1407.5787,
title = {Strong geometric frustration in model glassformers},
author = {C. Patrick Royall and Alex Malins and Andrew J. Dunleavy and Rhiannon Pinney},
journal= {arXiv preprint arXiv:1407.5787},
year = {2015}
}
Comments
14 pages, Accepted by J. Non-Crystalline Solids, 7th International Discussion Meeting on Relaxation in Complex Systems Proceedings