期刊
JOURNAL OF CHEMICAL PHYSICS
卷 138, 期 12, 页码 -出版社
AIP Publishing
DOI: 10.1063/1.4769981
关键词
-
资金
- Ministry of Education, Culture, Sports, Science and Technology, Japan (Kakenhi)
- Japan Society for the Promotion of Science (JSPS)
- JSPS
- Grants-in-Aid for Scientific Research [21224011, 11F01328] Funding Source: KAKEN
Most of the liquid-state theories, including glass-transition theories, are constructed on the basis of two-body density correlations. However, we have recently shown that many-body correlations, in particular, bond orientational correlations, play a key role in both the glass transition and the crystallization transition. Here we show, with numerical simulations of supercooled polydisperse hard spheres systems, that the length-scale associated with any two-point spatial correlation function does not increase toward the glass transition. A growing length-scale is instead revealed by considering many-body correlation functions, such as correlators of orientational order, which follows the length-scale of the dynamic heterogeneities. Despite the growing of crystal-like bond orientational order, we reveal that the stability against crystallization with increasing polydispersity is due to an increasing population of icosahedral arrangements of particles. Our results suggest that, for this type of systems, many-body correlations are a manifestation of the link between the vitrification and the crystallization phenomena. Whether a system is vitrified or crystallized can be controlled by the degree of frustration against crystallization, polydispersity in this case. (C) 2013 American Institute of Physics. [http://dx.doi.org/10.1063/1.4769981]
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据