Critical behavior of the Ising model with long range interactions
  We present results of a Monte Carlo study for the ferromagnetic Ising model with long range interactions in two dimensions. This model has been simulated for a large range of interaction parameter $\sigma$ and for large sizes. We observe that the results close to the change of regime from intermediate to short range do not agree with the renormalization group predictions. 
Marco Picco (LPTHE)
cond-mat.stat-mech hep-th