Signatures of dynamical heterogeneity in the structure of glassy free-energy minima

Chaudhuri, Pinaki ; Karmakar, Smarajit ; Dasgupta, Chandan (2008) Signatures of dynamical heterogeneity in the structure of glassy free-energy minima Physical Review Letters, 100 (12). 125701_1-125701_4. ISSN 0031-9007

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Official URL: http://prl.aps.org/abstract/PRL/v100/i12/e125701

Related URL: http://dx.doi.org/10.1103/PhysRevLett.100.125701

Abstract

From numerical minimization of a model free-energy functional for a system of hard spheres, we show that the width of the local peaks of the time-averaged density field at a glassy free-energy minimum exhibits large spatial variation, similar to that of the "local Debye-Waller factor" in simulations of dynamical heterogeneity. Molecular dynamics simulations starting from a particle configuration generated from the density distribution at a glassy free-energy minimum show similar spatial heterogeneity in the degree of localization, implying a direct connection between dynamical heterogeneity and the structure of glassy free-energy minima.

Item Type:Article
Source:Copyright of this article belongs to American Physical Society.
ID Code:22760
Deposited On:24 Nov 2010 08:10
Last Modified:17 May 2016 06:44

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