Universality class of the two-dimensional site-diluted Ising model.
In this work, we evaluate the probability distribution function of the order parameter for the two-dimensional site-diluted Ising model. Extensive Monte Carlo simulations have been performed for different spin concentrations p (0.70<or=p<or=1) on square lattices with linear sizes L (20<or=L<or=100). The results indicate that the universality class of the diluted Ising model seems to be independent of the amount of dilution. Logarithmic corrections of the finite-size critical temperature behavior of the model can also be inferred even for such small lattices.
Núcleo de Física, Universidade Federal do Tocantins, Bloco II, 77020-210, Palmas, TO, Brazil.
P H L
PH
Martins
J A
JA
Plascak