Aging effects manifested in the potential energy landscape of a model glass former
Abstract
We present molecular dynamics simulations of a model glass-forming liquid (the binary Kob-Anderson Lennard-Jones model) and consider the distributions of inherent energies and metabasins during aging. In addition to the typical protocol of performing a temperature jump from a high temperature to a low destination temperature, we consider the temporal evolution of the distributions after an 'up-jump', i.e. from a low to a high temperature. In this case the distribution of megabasin energies exhibits a transient two-peak structure. Our results can qualitatively be rationalized in terms of a trap model with a Gaussian distribution of trap energies. The analysis is performed for different system sizes. A detailed comparison with the trap model is possible only for a small system because of major averging effects for larger systems.
Keywords
Cite
@article{arxiv.1004.4738,
title = {Aging effects manifested in the potential energy landscape of a model glass former},
author = {Christian Rehwald and Nicoletta Gnan and Andreas Heuer and Thomas Schrøder and Jeppe C. Dyre and Gregor Diezemann},
journal= {arXiv preprint arXiv:1004.4738},
year = {2016}
}
Comments
16 pages, 14 figures