期刊
JOURNAL OF CHEMICAL PHYSICS
卷 130, 期 2, 页码 -出版社
AMER INST PHYSICS
DOI: 10.1063/1.3054359
关键词
glass structure; potential energy surfaces; vitrification
资金
- ANPCyT
- SeCyT
- CONICET
By means of the isoconfigurational method, we calculate the change in the propensity for motion that the structure of a glass-forming system experiences during its relaxation dynamics. The relaxation of such a system has been demonstrated to evolve by means of rapid crossings between metabasins of its potential energy surface (a metabasin being a group of mutually similar, closely related structures which differ markedly from other metabasins), as collectively relaxing units (d-clusters) take place. We now show that the spatial distribution of propensity in the system does not change significantly until one of these d-clusters takes place. However, the occurrence of a d-cluster clearly decorrelates the propensity of the particles, thus ending up with the dynamical influence of the structural features proper of the local metabasin. We also show an important match between particles that participate in d-clusters and that which show high changes in their propensity.
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