Monte Carlo Simulations on Nearest Neighbor Gaussian Ising Spin Glass with Finite Means (J ≠0)

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Abstract
Random two-dimensional (25×25) Ising spin systems with the nearest neighbor interactions J i j which are distributed according to Gaussian distributions are investigated by computer experiments. We obtain, as the functions of the mean \bar J , magnetization and energy of the ground states, and the temperature T c, q ( T c, m ) below which the Edwards-Anderson order parameter q (magnetization m ) is finite. Qualitative interpretations of the phase diagram thus obtained, as well as those of clustering features observed in this model system, are presented.