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Finite-size effects in the diffusion dynamics of a glass-forming binary mixture with large size ratio
- Publication Year :
- 2022
- Publisher :
- arXiv, 2022.
-
Abstract
- Extensive molecular dynamics (MD) computer simulations of an equimolar glass-forming AB mixture with large size ratio are presented. While the large A particles show a glass transition around the critical density of mode coupling theory $\rho_c$, the small B particles remain mobile with a relatively weak decrease of their self diffusion coefficient $D_{\rm B}$ with increasing density. Surprisingly, around $\rho_c$, the self-diffusion coefficient of the A particles, $D_{\rm A}$, also starts to follow a rather weak dependence on density. We show that this is due to finite-size effects that can be understood from the analysis of the collective interdiffusion dynamics.<br />Comment: 10 pages, 8 figures
Details
- Database :
- OpenAIRE
- Accession number :
- edsair.doi.dedup.....32c23299a3eb3a641528c8b0427af92d
- Full Text :
- https://doi.org/10.48550/arxiv.2202.12189