6533b855fe1ef96bd12b145c
RESEARCH PRODUCT
Aging effects manifested in the potential-energy landscape of a model glass former
Christian RehwaldGregor DiezemannThomas B. SchrøderAndreas HeuerJeppe C. DyreNicoletta Gnansubject
PhysicsGaussianFOS: Physical sciencesBinary numberDisordered Systems and Neural Networks (cond-mat.dis-nn)Condensed Matter - Disordered Systems and Neural NetworksMolecular physicsMolecular dynamicssymbols.namesakeDistribution (mathematics)Temperature jumpThermodynamic limitsymbolsTransient (oscillation)Statistical physicsEnergy (signal processing)description
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.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2010-04-27 | Physical Review E |