Dynamical heterogeneity in a glass-forming ideal gas.

Loading...
Thumbnail Image

Date

2008-07

Journal Title

Journal ISSN

Volume Title

Repository Usage Stats

138
views
155
downloads

Citation Stats

Abstract

We conduct a numerical study of the dynamical behavior of a system of three-dimensional "crosses," particles that consist of three mutually perpendicular line segments of length sigma rigidly joined at their midpoints. In an earlier study [W. van Ketel, Phys. Rev. Lett. 94, 135703 (2005)] we showed that this model has the structural properties of an ideal gas, yet the dynamical properties of a strong glass former. In the present paper we report an extensive study of the dynamical heterogeneities that appear in this system in the regime where glassy behavior sets in. On the one hand, we find that the propensity of a particle to diffuse is determined by the structure of its local environment. The local density around mobile particles is significantly less than the average density, but there is little clustering of mobile particles, and the clusters observed tend to be small. On the other hand, dynamical susceptibility results indicate that a large dynamical length scale develops even at moderate densities. This suggests that propensity and other mobility measures are an incomplete measure of the dynamical length scales in this system.

Department

Description

Provenance

Subjects

Citation

Published Version (Please cite this version)

10.1103/PhysRevE.78.011505

Publication Info

Charbonneau, Patrick, Chinmay Das and Daan Frenkel (2008). Dynamical heterogeneity in a glass-forming ideal gas. Phys Rev E Stat Nonlin Soft Matter Phys, 78(1 Pt 1). p. 011505. 10.1103/PhysRevE.78.011505 Retrieved from https://hdl.handle.net/10161/12591.

This is constructed from limited available data and may be imprecise. To cite this article, please review & use the official citation provided by the journal.

Scholars@Duke

Charbonneau

Patrick Charbonneau

Professor of Chemistry

Professor Charbonneau studies soft matter. His work combines theory and simulation to understand the glass problem, protein crystallization, microphase formation, and colloidal assembly in external fields.


Unless otherwise indicated, scholarly articles published by Duke faculty members are made available here with a CC-BY-NC (Creative Commons Attribution Non-Commercial) license, as enabled by the Duke Open Access Policy. If you wish to use the materials in ways not already permitted under CC-BY-NC, please consult the copyright owner. Other materials are made available here through the author’s grant of a non-exclusive license to make their work openly accessible.