Monte Carlo simulations are used to analyse the behavior of the extended Ashkin-Teller model in two dimensions from the ratio of the square of the second moment of the order parameter to its fourth moment. The critical surface in three dimensional parameter space is calculated in regions where...

The quenched site-diluted Ising ferromagnet on a square lattice, for which each site is occupied or empty with probabilities p and 1 − p, respectively, is studied numerically through damage-spreading procedures. By making use of the Glauber dynamics, the percolation threshold pc is estimated....

We report the inelastic neutron scattering from planar Ising ferromagnets. The lattice structures investigated are square, kagomé, triangular, and 3–12 (extended kagomé). Exact solutions are obtained for the inelastic neutron scattering function Sxx(q, ω) of these isotropic Ising...

We describe a number of recently developed cluster-flipping algorithms for the efficient stimulation of classical spin models near their critical temperature. These include the algorithms of Wolff, Swendsen and Wang, and Niedermeyer, as well as the limited cluster algorithm, the multigrid...