SECOND-ORDER PHASE TRANSITION INDUCED BY THE QUENCHED RANDOM DILUTION IN 3D

The eect of the quenched random dilution on the ferromagnetic transitions, in particular, the conversion from the rst- to second-order transition is discussed. The new results are presented for the diluted three-dimensional three-state Potts model. The critical exponents of the disorder-induced second-order phase transition are derived by the nite-size scaling analysis of the moments of the energy and the largest cluster, obtained from the Monte Carlo simulations. PACS numbers: 05.50.+q, 64.60.Cn UDC 536.76