Spatiotemporal Heterogeneity of Local Free Volumes in Highly Supercooled Liquid

Details Spatiotemporal Heterogeneity of Local Free Volumes in Highly Supercooled Liquid Spatiotemporal Heterogeneity of Local Free Volumes in Highly Supercooled Liquid

2012-02-16

arxiv.org/abs/1202.3509v1

Physics

Condensed Matter

Soft Condensed Matter

5 pages, 6 figures

Scientific paper

We discuss the spatiotemporal behavior of local density and its relation to dynamical heterogeneity (DH) in a highly supercooled liquid by using molecular dynamics simulations of a binary mixture with different particle sizes in two dimensions. To trace voids heterogeneously existing with lower local densities, which move along with the structural relaxation, we employ the minimum local density for each particle in a time window whose width is set along with the structural relaxation time. Particles subject to free volumes correspond well to the mobile region of DH. However, no growth in the correlation length of heterogeneity in the minimum local density distribution takes place.

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