Ionic criticality: An exactly soluble model

被引：21

作者：

Aqua, JN ^{[1
]}

Fisher, ME ^{[1
]}

机构：

[1] Univ Maryland, Inst Phys Sci & Technol, College Pk, MD 20742 USA

来源：

PHYSICAL REVIEW LETTERS | 2004年 / 92卷 / 13期

基金：

美国国家科学基金会;

关键词：

D O I：

10.1103/PhysRevLett.92.135702

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Gas-liquid criticality in ionic fluids is studied in exactly soluble spherical models that use interlaced sublattices to represent hard-core multicomponent systems. Short-range attractions in the uncharged fluid drive criticality, but charged ions do not alter the universality class. Debye screening remains exponential at criticality in fully ion-symmetric 1:1 models. However, ionic asymmetry couples charge and density fluctuations in a direct manner: The charge correlation length then diverges precisely as the density correlation length and the Stillinger-Lovett rule is violated at criticality.

引用

页码：135702 / 1

页数：4