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Critical structure factor in Ising systems

Victor Martin-Mayor, Andrea Pelissetto, Ettore Vicari

cond-mat.stat-mecharXiv:cond-mat/0202393

Abstract

We perform a large-scale Monte Carlo simulation of the three-dimensional Ising model on simple cubic lattices of size L3 with L=128 and 256. We determine the corresponding structure factor (Fourier transform of the two-point function) and compare it with several approximations and with experimental results. We also compute the turbidity as a function of the momentum of the incoming radiation, focusing in particular on the deviations from the Ornstein-Zernicke expression of Puglielli and Ford.

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