1202.3509 (Hayato Shiba et al.)

Spatiotemporal Heterogeneity of Local Free Volumes in Highly Supercooled
Liquid    [PDF]

Hayato Shiba, Takeshi Kawasaki

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.

View original: http://arxiv.org/abs/1202.3509