Coexistence and Criticality in Size-Asymmetric Hard-Core Electrolytes
Statistical Mechanics
2016-08-31 v1
Abstract
Liquid-vapor coexistence curves and critical parameters for hard-core 1:1 electrolyte models with diameter ratios lambda = sigma_{-}/\sigma_{+}=1 to 5.7 have been studied by fine-discretization Monte Carlo methods. Normalizing via the length scale sigma_{+-}=(sigma_{+} + sigma_{-})/2 relevant for the low densities in question, both Tc* (=kB Tc sigma_{+-}/q^2 and rhoc* (= rhoc sigma _{+-}^{3}) decrease rapidly (from ~ 0.05 to 0.03 and 0.08 to 0.04, respectively) as lambda increases. These trends, which unequivocally contradict current theories, are closely mirrored by results for tightly tethered dipolar dimers (with Tc* lower by ~ 0-11% and rhoc* greater by 37-12%).
Cite
@article{arxiv.cond-mat/0007452,
title = {Coexistence and Criticality in Size-Asymmetric Hard-Core Electrolytes},
author = {J. M. Romero-Enrique and G. Orkoulas and A. Z. Panagiotopoulos and M. E. Fisher},
journal= {arXiv preprint arXiv:cond-mat/0007452},
year = {2016}
}
Comments
4 pages, 5 figures