The critical behavior of 3D Ising spin glass models: universality and scaling corrections

We perform high-statistics Monte Carlo simulations of three three-dimensional Ising spin glass models: the +/- J Ising model for two values of the disorder parameter p, p = 1/2 and 0.7, and the bond-diluted +/- J model for bond-occupation probability pb = 0.45. A. nite-size scaling analysis of the quartic cumulants at the critical point shows conclusively that these models belong to the same universality class and allows us to estimate the scaling-correction exponent. related to the leading irrelevant operator, omega = 1.0(1). We also determine the critical exponents nu and eta. Taking into account the scaling corrections, we obtain nu = 2.53(8) and eta = -0.384(9).