Abstract
This paper studies physical aging by computer simulations of a 2:1 Kob–Andersen binary Lennard-Jones mixture, a system that is less prone to crystallization than the standard 4:1 composition. Starting from thermal-equilibrium states, the time evolution of the following four quantities is monitored by following up and down jumps in temperature: potential energy, virial, average squared force, and the Laplacian of the potential energy. Despite the fact that significantly larger temperature jumps are studied here than in typical similar experiments, to a good approximation, all four quantities conform to the single-parameter-aging scenario derived and validated for small jumps in experiments [T. Hecksher, N. B. Olsen, and J. C. Dyre, J. Chem. Phys. 142, 241103 (2015)]. As a further confirmation of single-parameter aging with a common material time for the four different quantities monitored, their relaxing parts are found to be almost identical for all temperature jumps.
Original language | English |
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Article number | 094504 |
Journal | Journal of Chemical Physics |
Volume | 154 |
Issue number | 9 |
Number of pages | 9 |
ISSN | 0021-9606 |
DOIs | |
Publication status | Published - 7 Mar 2021 |