Abstract Within the framework of an effective‐field theory, the longitudinal and transverse magnetization, critical temperature, and critical transverse field of a site‐bond diluted transverse Ising ferromagnet on square lattice with S = 1 are calculated in detail. The dependence of these thermodynamic quantities on the concentration of the sites and of the bonds is investigated.

physica status solidi (b)May 1, 198926 citations

Single-cluster algorithm for the site-bond-correlated Ising model

Paulo R. A. Campos, Roberto Nicolau Onody

We extend the Wolff algorithm to include correlated spin interactions in diluted magnetic systems. This algorithm is applied to study the site-bond-correlated Ising model on a two-dimensional square lattice. We use a finite-size scaling procedure to obtain the phase diagram in the temperature-concentration space. We also have verified that the autocorrelation time diminishes in the presence of dilution and correlation, showing that the Wolff algorithm performs even better in such situations.

arXiv:cond-mat/9709317Physical review. B, Condensed matterDec 1, 19974 citations