Anomalous diffusion in supercooled liquids: a long-range localisation in particle trajectories
Soft Condensed Matter
2008-11-19 v1
Abstract
A statistical analysis of the geometries of particle trajectories in the supercooled liquid state is reported. We examine two structurally different fragile glass-forming liquids simulated by molecular dynamics. In both liquids, the trajectories are found to exhibit a long-range localisation distinct from the short-range localisation within the cage of nearest neighbours. This novel diffusion anomaly is interpreted as a result of the potential-energy landscape topography of fragile glass-formers where the local energy minima coalesce into metabasins - compact domains with low escape probability.
Cite
@article{arxiv.0811.2817,
title = {Anomalous diffusion in supercooled liquids: a long-range localisation in particle trajectories},
author = {Tomas Oppelstrup and Mikhail Dzugutov},
journal= {arXiv preprint arXiv:0811.2817},
year = {2008}
}
Comments
4 pages, 4 figure, submitted to Physical Review Letters