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Generalized van der Waals theory of liquid-liquid phase transitions

Yu. D. Fomin, V. N. Ryzhov, E. E. Tareyeva

cond-mat.stat-mecharXiv:cond-mat/0512640

Abstract

In the framework of the thermodynamic perturbation theory for fluids we study how the phase diagram of an isotropic repulsive soft-core attractive potential, where a liquid-liquid phase transition exists in addition to the standard gas-liquid phase transition, changes by varying the parameters of the potential. We show that existence of the liquid-liquid transition is determined by the interplay of the parameters of the potential and the structure of a reference liquid.

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