Towards Relating Fragile-To-Strong Transition to Fragile Glass
Abstract
Glass formers are in general classified as strong or fragile depending on whether their relaxation rates follow Arrhenius or super-Arrhenius temperature dependence. There are however notable exceptions such as water, which exhibit a fragile-to-strong (FTS) transition and behave as fragile and strong respectively at high and low temperatures. In this work, the FTS transition is studied using a distinguishable-particle lattice model previously demonstrated to be capable of simulating both strong and fragile glasses [Phys. Rev. Lett. 125, 265703 (2020)]. Starting with a bimodal pair-interaction distribution appropriate for fragile glasses, we show that by narrowing down the energy dispersion in the low-energy component of the distribution, a FTS transition is observed. The transition occurs at a temperature at which the stretching exponent of the relaxation is minimized, in agreement with previous molecular dynamics simulations.
Keywords
Cite
@article{arxiv.2211.15026,
title = {Towards Relating Fragile-To-Strong Transition to Fragile Glass},
author = {Chin-Yuan Ong and Chun-Shing Lee and Xin-Yuan Gao and Qiang Zhai and Rui Shi and Hai-Yao Deng and Chi-Hang Lam},
journal= {arXiv preprint arXiv:2211.15026},
year = {2023}
}