Zusammenfassung
We investigate the two-dimensional ferromagnetic Ising model in the
Voronoi-Delaunay tesselation. In this study, we assume that the coupling
factor J varies with the distance r between the first neighbors as J(r)
proportional to e(-alpha r), with alpha greater than or equal to 0. The
disordered system is simulated applying the single-cluster Monte Carlo
update algorithm and the reweighting technique. We calculate the
critical point exponents gamma/nu, beta/nu and nu for this model and
find that this random system belongs to the same universality class as
the pure two-dimensional ferromagnetic Ising model. (C) 2000 Elsevier
Science B.V. All rights reserved.
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