Inherent structures dynamics in glasses: a comparative study

Details Inherent structures dynamics in glasses: a comparative study Inherent structures dynamics in glasses: a comparative study

2004-01-22

arxiv.org/abs/cond-mat/0401435v1

Physica A 340 (2004) 316-326

Physics

Condensed Matter

Statistical Mechanics

Proceedings of NEXT2003 (News and Expectations in Thermostatistics, Sardinia, Italy, september 2003)

Scientific paper

10.1016/j.physa.2004.04.022

A comparative study of the dynamics of inherent structures at low temperatures is performed on different models of glass formers: a three dimensional Lennard-Jones binary mixture (LJBM), facilitated spin models (either symmetrically constrained, SCIC, or asymmetrically, ACIC) and the trap model. We use suitable correlation functions introduced in a previous work which allow to distinguish the behaviour between models with or without spatial or topological structure. Furthermore, the correlations between inherent structures behave differently in the cases of strong (SCIC) and fragile (ACIC, LJBM) glasses, as a consequence of the different role played by energy barriers when the temperature is lowered. The similarities in the behaviour of the ACIC and LJBM suggest a common nature of the glassy dynamics for both systems.

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