Abstract
We investigate the critical properties of the Ising model in two dimensions on directed small-world lattice with quenched connectivity disorder. The disordered system is simulated by applying the Monte Carlo update heat bath algorithm. We calculate the critical temperature, as well as the critical exponents γ/ν, β/ν, and 1/ν for several values of the rewiring probability p . We find that this disorder system does not belong to the same universality class as the regular two-dimensional ferromagnetic model. The Ising model on directed small-world lattices presents in fact a second-order phase transition with new critical exponents which do not depend on p (0 < p < 1), but are identical to the exponents of the Ising model and the spin-1 Blume-Capel model on directed small-world network.
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