Vorselaars, Bart, Lyulin, Alexey V., Karatasos, K. and Michels, M. A. J. (2007) Non-Gaussian nature of glassy dynamics by cage to cage motion. Physical Review E, 75 (1). ISSN 1539-3755
Full content URL: http://dx.doi.org/10.1103/PhysRevE.75.011504
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PRE-Vorselaars-non-Gaussian.pdf - Whole Document 431kB |
Item Type: | Article |
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Item Status: | Live Archive |
Abstract
A model based on a single Brownian particle moving in a periodic effective field is used to understand the non-Gaussian dynamics in glassy systems of cage escape and subsequent recaging, often thought to be caused by a heterogeneous glass structure. The results are compared to molecular-dynamics simulations of systems with varying complexity: quasi-two-dimensional colloidlike particles, atactic polystyrene, and a dendritic glass. The model nicely describes generic features of all three topologically different systems, in particular around the maximum of the non-Gaussian parameter. This maximum is a measure for the average distance between cages.
Keywords: | glass cage, Glass transition, non-gaussian behaviour, hopping, molecular dynamics |
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Subjects: | F Physical Sciences > F300 Physics J Technologies > J300 Ceramics and Glasses F Physical Sciences > F320 Chemical Physics H Engineering > H310 Dynamics F Physical Sciences > F310 Applied Physics |
Divisions: | College of Science > School of Mathematics and Physics |
ID Code: | 18234 |
Deposited On: | 05 Aug 2015 15:56 |
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