Finite-size effects in the diffusion dynamics of a glass-forming binary mixture with large size ratio
| Autor: | Vaibhav, Vinay, Horbach, Jürgen, Chaudhuri, Pinaki |
|---|---|
| Rok vydání: | 2022 |
| Předmět: | |
| Druh dokumentu: | Working Paper |
| DOI: | 10.1063/5.0090330 |
| Popis: | 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. Comment: 10 pages, 8 figures |
| Databáze: | arXiv |
| Externí odkaz: |
|