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Field theory for size- and charge-asymmetric primitive model of ionic systems: Mean-field stability analysis and pretransitional effects

A. Ciach, W. T. Góźdź, G. Stell
2007 Physical Review E  

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2006 accepted arXiv:cond-mat/0609521v2 fatcat:xvnxdcoobjfprhby22bzjl5lce

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2006 pre-print
arXiv:cond-mat/0609521v1 fatcat:m744ntyygbasrd4tx3ggct7xuq
The primitive model of ionic systems is investigated within a field-theoretic description for the whole range of size-, \lambda, and charge, Z, ratios of the two ionic species. Two order parameters (OP) are identified, and their relations to physically relevant quantities are described for various values of \lambda and Z. Instabilities of the disordered phase associated with the two OP's are determined in the mean-field approximation. A gas-liquid separation occurs for any Z and \lambda
more » ... t from 1. In addition, an instability with respect to various types of periodic ordering of the two kinds of ions is found.
doi:10.1103/physreve.75.051505 pmid:17677071 fatcat:pvsobjct2jfjvjokuvssmwwk5q
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A. Ciach, W. T. Góźdź, G. Stell. "Field theory for size- and charge-asymmetric primitive model of ionic systems: Mean-field stability analysis and pretransitional effects." Physical Review E 75.5 (2007)