Finite-size scaling of the three-dimensional conserved-order-parameter Ising model via Wang-Landau algorithm

The critical properties of the conserved-order-parameter (COP) version of the three-dimensional Ising model with zero magnetization were investigated by means of the Monte Carlo (MC) Wang-Landau algorithm. The study was carried out in appropriate restricted but dominant energy subspaces. The main effort was focused on the specific-heat and Binder energy cumulant by using the density of states of the model for lattices with linear size L=4-60. By applying finite-size scaling analysis, the estimated values for the thermal critical exponent yt and critical temperature Kc are in agreement with the considered as best values leading to the conclusion that this model belongs to the Ising universality class. The analysis revealed the necessity of corrections to scaling functions for interpreting correctly the MC data.