2003/11/20 by Jean-Noel Aqua, Jean‐Noël Aqua, Michael E. Fisher · 2 citations
Chemical Engineering · Engineering · Physics and Astronomy · #Ionic liquids properties and applications #Phase Equilibria and Thermodynamics #Theoretical and Computational Physics #cond-mat.stat-mech
paper · pdf · doi:10.1103/physrevlett.92.135702
4 pages, 1 figure
arxiv created 2003/11/20 · openalex publication_date 2004/04/02 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
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.