Finite size scaling in 3D Ising spin glasses

We present the results of Monte Carlo simulations of the three-dimensional Edwards-Anderson model of spin glasses with binary (+/-J) interactions. We provide direct evidence for the finite-size-scaling hypothesis and we deter mine the universal scaling functions. Using an iterative method for extrapo lating data to infinite volume, we reach (overlap) correlation lengths larg er than xi similar to 200. This allows us to clearly identify a finite-temp erature phase transition. (C) 1999 Published by Elsevier Science B.V. All r ights reserved.