Growth of spatial correlations in the aging of a simple structural glass
Abstract
We present a detailed numerical study of dynamical heterogeneities in the aging regime of a simple binary Lennard-Jones glass former. For most waiting times tw and final times t, both the dynamical susceptibility 4(t,tw) and the dynamical correlation length 4(t,tw) can be approximated as products of two factors: i) a waiting time dependent scale that grows as a power of tw, and ii) a scaling function dependent on t,tw only through the value of the intermediate scattering function C(t,tw). We find that 4(t,tw) is determined *only in part* by the correlation volume.
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