Soft-core binary fluid exhibiting a λ-line and freezing to a highly delocalized crystal

被引:43
作者
Archer, AJ [1 ]
Likos, CN
Evans, R
机构
[1] Univ Bristol, HH Wills Phys Lab, Bristol BS8 1TL, Avon, England
[2] Univ Dusseldorf, Inst Theoret Phys 2, D-40225 Dusseldorf, Germany
基金
英国工程与自然科学研究理事会;
关键词
D O I
10.1088/0953-8984/16/23/L03
中图分类号
O469 [凝聚态物理学];
学科分类号
070205 ;
摘要
We show that a simple soft-core binary fluid mixture with purely repulsive interactions exhibits a lambda-line, i.e., a line of continuous transitions to a state characterized by undamped periodic concentration fluctuations (microphase separation). For states in the disordered fluid phase the bulk pair correlation functions exhibit strong 1-2 ordering, similar to that found in ionic fluids, which is also reflected in the density profiles of confined fluids. The latter display fluid layers alternating from rich in species 1 to rich in species 2. We argue that the; lambda-instability drives a freezing transition to a highly delocalized crystal, with Lindemann ratios that can exceed 90% near melting.
引用
收藏
页码:L297 / L303
页数:7
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