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arXiv 1102.2953cond-mat.soft
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气液界面的局部结构

Local structure of Liquid-Vapour Interfaces

Maia Godonoga, Alex Malins, Jens Eggers, C. Patrick Royall

摘要:

简单液体的结构可以用同一液体的少量原子的基态团簇来表征。在这里,我们使用这种敏感的结构探针来考虑液体-蒸汽界面对液体结构的影响。在较高的温度(约一半以上的临界温度),我们发现,界面的主要影响是减少局部密度,这显着抑制当地集群人口。然而,在较低的温度下,发现明显的界面分层。这似乎与基于3-和5-元环的簇的显著取向有序有关,环分别垂直和平行于界面排列。在所有温度下,我们发现,人口的五倍对称结构的抑制,而不是增强,接近接口。

英文摘要:

The structure of a simple liquid may be characterised in terms of ground state clusters of small numbers of atoms of that same liquid. Here we use this sensitive structural probe to consider the effect of a liquid-vapour interface upon the liquid structure. At higher temperatures (above around half the critical temperature) we find that the predominant effect of the interface is to reduce the local density, which significantly suppresses the local cluster populations. At lower temperatures, however, pronounced interfacial layering is found. This appears to be connected with significant orientational ordering of clusters based on 3- and 5-membered rings, with the rings aligning perpendicular and parallel to the interface respectively. At all temperatures, we find that the population of five-fold symmetric structures is suppressed, rather than enhanced, close to the interface.

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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