A crossover in spatio-temporal correlations of strain fluctuations in glass forming liquids

M Hassani and M Bruns and F Varnik, JOURNAL OF STATISTICAL MECHANICS- THEORY AND EXPERIMENT, 2020, 014002 (2020).

DOI: 10.1088/1742-5468/ab5366

Via molecular dynamics simulations of a generic glass former in the supercooled and normal liquid states, it is shown that spatial correlations of strain fluctuations exhibit a crossover from the well- established power-law 1/r(3)-decay at long wavelengths to an exponential behavior, at intermediate distances. The characteristic length of the exponential decay grows both with temperature and time via, , with being the temperature-dependent diffusion coefficient. This suggests that the crossover between the power-law and exponential decays is governed by a diffusion process.

Return to Publications page