Tracking heterogeneous dynamics during the alpha-relaxation of a simple glass-former

Details Tracking heterogeneous dynamics during the alpha-relaxation of a simple glass-former Tracking heterogeneous dynamics during the alpha-relaxation of a simple glass-former

2008-08-19

arxiv.org/abs/0808.2589v2

Phys. Rev. Lett. 101, 190601 (2008)

Physics

Condensed Matter

Statistical Mechanics

Revised version. 4 pages. 6 figures

Scientific paper

10.1103/PhysRevLett.101.190601

We study the relaxation process in a simple glass-former - the KA lattice gas model. We show that, for this model, structural relaxation is due to slow percolation of regions of co-operatively moving particles, which leads to heterogeneous dynamics of the system. We find that the size distribution of these regions is given by a power-law and that their formation is encoded in the initial structure of the particles, with the memory of initial configuration increasingly retained with increasing density.

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