Coexistence and criticality in size-asymmetric hard-core electrolytes

Monte Carlo methods were used to analyze the liquid-vapor coexistence curves and critical parameters for hard core electrolyte models. The fine-discretization simulations of hard core electrolyte models, show that the increase in the size symmetry, leads to sharp monotonic drops in appropriately scaled critical temperatures and densities. These results, which contradict the established theories, are mirrored by the results for tightly tethered dipolar dimers.