Phase Diagram of a Lattice Microemulsion Model in Two Dimensions

Abstract

The phase diagram of a lattice microemulsion model proposed by Ciach, Hye and Stell is studied using mean-field theory and Monte Carlo simulations. Surfactant directional degrees of freedom are summed out exactly before mean-field theory is applied, and the resulting phase diagrams are much improved compared with previous mean-field results. The critical line and tricritical point is located using Monte Carlo simulations and finite size scaling.

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