Ageing and crystallization in a lattice glass model

TL;DR

This study investigates a 3D lattice glass model to understand aging and crystallization, revealing limitations in its applicability for exploring deeply supercooled regimes due to rapid equilibration.

Contribution

The paper demonstrates that the lattice glass model's metastability limit exceeds the Kauzmann temperature and assesses its aging dynamics, highlighting its limited usefulness for deep supercooling studies.

Findings

Metastability limit is above the Kauzmann temperature.

Aging exponent is below 0.5 in the metastable region.

Model reaches equilibrium relatively quickly.

Abstract

We have studied a the 3-$d$ lattice glass of Pica Ciamarra, Tarzia, de Candia and Coniglio [Phys.\ Rev.\ E. 67, 057105 (2013)], which has been shown to reproduce several features of the structural glass phenomenology, such as the cage effect, exponential increase of relaxation times and ageing. We show, using short-time dynamics, that the metastability limit is above the estimated Kauzmann temperature. We also find that in the region where the metastable liquid exists the aging exponent is lower that 0.5, indicating that equilibrium is reached relatively quickly. We conclude that the usefulness of this model to study the deeply supercooled regime is rather limited.