MESOSCOPIC FIELD THEORY OF IONIC SYSTEMS

Author:

CIACH A.1,STELL G.2

Affiliation:

1. Institute of Physical Chemistry, Polish Academy of Sciences, 01-224 Warszawa, Poland

2. Department of Chemistry, State University of New York, Stony Brook, NY 11 794-3400, USA

Abstract

A mesoscopic field theory for the primitive model of ionic systems with additional, short-range interactions is presented. Generic models in continuum space and with positions of the ions restricted to lattice sites of various lattices are described in detail. We describe briefly the field-theoretic methods and review the foundations of the mesoscopic description. The types of phase diagrams predicted by our theory for different versions of the model are presented and discussed. They all agree with recent simulations. On the quantitative level our theory yields an RPM tricritical-point location on the sc lattice which is in good agreement with the simulation results. Arguments indicating that the critical point in the RPM belongs to the Ising universality class are given.

Publisher

World Scientific Pub Co Pte Lt

Subject

Condensed Matter Physics,Statistical and Nonlinear Physics

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