Democratic particle motion for meta-basin transitions in simple glass-formers

Details Democratic particle motion for meta-basin transitions in simple glass-formers Democratic particle motion for meta-basin transitions in simple glass-formers

2005-06-22

arxiv.org/abs/cond-mat/0506577v2

Physics

Condensed Matter

Disordered Systems and Neural Networks

4 pages, 4 Postscript figures

Scientific paper

We use molecular dynamics computer simulations to investigate the local motion of the particles in a supercooled simple liquid. Using the concept of the distance matrix we find that the alpha-relaxation corresponds to a small number of crossings from one meta-basin to a neighboring one. Each crossing is very rapid and involves the collective motion of O(40) particles that form a relatively compact cluster, whereas string-like motions seem not to be relevant for these transitions. These compact clusters are thus candidates for the cooperatively rearranging regions proposed long times ago by Adam and Gibbs.

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