Phase diagram of a lattice microemulsion model in two dimensions

This is the authors' abstract. We don't add key points for this paper.

The phase diagram of a lattice microemulsion model proposed by Ciach, Ho/ye, and Stell [J. Phys. A 21, L777 (1988); J. Chem. Phys. 90, 1214 (1989)] 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 are located using Monte Carlo simulations and finite-size scaling.