On the relationship between structure and dynamics in a supercooled liquid

Details On the relationship between structure and dynamics in a supercooled liquid On the relationship between structure and dynamics in a supercooled liquid

2009-01-23

arxiv.org/abs/0901.3759v2

J. Phys.: Condens. Matter 17 (2005) S4025

Physics

Condensed Matter

Statistical Mechanics

Published, see below or http://www.iop.org/EJ/abstract/0953-8984/17/49/001/ Editing comments have been removed

Scientific paper

10.1088/0953-8984/17/49/001

We present the dynamic propensity distribution as an explicit measure of the degree to which the dynamics in a liquid over the time scale of structural relaxation is determined by the initial configuration. We then examine, for a binary mixture of soft discs in two dimensions, the correlation between the spatial distribution of propensity and that of two localmeasures of configuration structure: the local composition and local free volume. While the small particles dominate the high propensity population,we find no strong correlation between either the local composition or the local free volume and the propensity. It is argued that this is a generic failure of purely local structural measures to capture the inherently non-local character of collective behaviour.

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