Lima, F.W.S.; Stauffer, D. - In: Physica A: Statistical Mechanics and its Applications 359 (2006) C, pp. 423-429
On directed lattices, with half as many neighbours as in the usual undirected lattices, the Ising model does not seem to show a spontaneous magnetisation, at least for lower dimensions. Instead, the decay time for flipping of the magnetisation follows an Arrhenius law on the square and simple...