Heterogeneity in structurally arrested hard spheres
Li, Zi-Qi1; Sun, Zhao-Yan1; An, Li-Jia1; Wang, Zhen-Gang2
Source PublicationEPL
AbstractWhen cooled or compressed sufficiently rapidly, a liquid vitrifies into a glassy amorphous state. Vitrification in a dense liquid is associated with jamming of the particles. For hard spheres, the density and degree of order in the final structure depend on the compression rate: simple intuition suggests, and previous computer simulation demonstrates, that slower compression results in states that are both denser and more ordered. In this work, we use the Lubachevsky-Stillinger algorithm to generate a sequence of structurally arrested hard-sphere states by varying the compression rate. We find that while the degree of order, as measured by both bond-orientation and translation order parameters, increases monotonically with decreasing compression rate, the density of the arrested state first increases, then decreases, then increases again, as the compression rate decreases, showing a minimum at an intermediate compression rate. Examination of the distribution of the local order parameters and the distribution of the root-mean-square fluctuation of the particle positions, as well as direct visual inspection of the arrested structures, reveal that they are structurally heterogeneous, consisting of disordered, amorphous regions and locally ordered crystal-like domains. In particular, the low-density arrested states correspond with many interconnected small crystal clusters that form a polycrystalline network interspersed in an amorphous background, suggesting that jamming by the domains may be an important mechanism for these states. Copyright (C) EPLA, 2008
Indexed BySCI
WOS IDWOS:000263598500024
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Cited Times:4[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Corresponding AuthorLi, Zi-Qi
Affiliation1.Chinese Acad Sci, Grad Sch, Changchun Inst Appl Chem, State Key Lab Polymer Phys & Chem, Changchun 130022, Peoples R China
2.CALTECH, Div Chem & Chem Engn, Pasadena, CA 91125 USA
Recommended Citation
GB/T 7714
Li, Zi-Qi,Sun, Zhao-Yan,An, Li-Jia,et al. Heterogeneity in structurally arrested hard spheres[J]. EPL,2008,84(2).
APA Li, Zi-Qi,Sun, Zhao-Yan,An, Li-Jia,&Wang, Zhen-Gang.(2008).Heterogeneity in structurally arrested hard spheres.EPL,84(2).
MLA Li, Zi-Qi,et al."Heterogeneity in structurally arrested hard spheres".EPL 84.2(2008).
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