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Geometric properties of the three-dimensional Ising and XY models
Frank Winter1, Wolfhard Janke, Adriaan M J Schakel
1Institut für Theoretische Physik, Freie Universität Berlin, Arnimallee 14, Berlin, Germany.
Abstract:
The fractal structure of high-temperature graphs of the three-dimensional Ising and XY models is investigated by simulating these graphs directly on a cubic lattice and analyzing them with the help of percolation observables. The Ising graphs are shown to percolate right at the Curie critical point. The diverging length scale relevant to the graphs in the vicinity of the percolation threshold is shown to be provided by the spin correlation length. The fractal dimension of the high-temperature graphs at criticality is estimated to be D=1.7349(65) for the Ising and D=1.7626(66) for the XY models.
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