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arXiv 1709.00699cond-mat.softcond-mat.dis-nncond-mat.mtrl-scicond-mat.stat-mech
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无序胶体悬浮液中的取向有序

Orientational Order in Disordered Colloidal Suspensions

Xiunan Yang, Wei-Hua Wang, Ke Chen

摘要:

在包括液体和玻璃在内的无序系统中探索结构有序性是凝聚态物理中一个有趣而又具有挑战性的问题。在这里,我们构建了一个新的参数的粒子的角分布函数的基础上,并表明,这种新的取向顺序具有显着更高的相关性与动态异质性相比,在胶体玻璃中的径向分布函数的基础上的平移参数。过冷液体中取向序和平移序的逐渐发展表明,取向序与动力学之间较高的相关性来自于玻璃化转变的开始,简单液体经过相当程度的过冷后,取向序将主导玻璃化动力学。我们的结果表明,取向顺序反映了在玻璃化转变过程中形成的非晶秩序,而平移顺序主要是密度增加的结果。

英文摘要:

Exploring structural order in disordered systems including liquids and glasses is an intriguing but challenging issue in condensed matter physics. Here we construct a new parameter based on the angular distribution function of particles and show that this new orientational order has significantly higher correlation with dynamic heterogeneity compared to a translational parameter based on the radial distribution functions in colloidal glasses. The gradual development of orientational and translational order in supercooled liquids shows that the higher correlation between orientational order and dynamics comes from the onset of glass transition and the orientational order would dominate the glassy dynamics after a simple liquid is considerably supercooled. Our results suggest that orientational order reflects the formation of amorphous order during glass transition while translational order is mainly a result of density increase.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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