Microscopic model for microemulsions. II. Behavior at low temperatures and critical point

Low temperature properties and critical behavior for the more simple versions of the microemulsion model introduced in Ref. 1 are investigated. For the lattice case with nearest-neighbor interactions an analytic asymptotic expression for the surface tension at the oil–microemulsions–water coexistence is found for low T. For both lattice and continuum cases the critical point is determined, and we show how an oscillating phase (microemulsion) may be formed below the critical temperature.