Classical critical behavior of spin models with long-range interactions
Abstract
We present the results of extensive Monte Carlo simulations of Ising models with algebraically decaying ferromagnetic interactions in the regime where classical critical behavior is expected for these systems. We corroborate the values for the exponents predicted by renormalization theory for systems in one, two, and three dimensions and accurately observe the predicted logarithmic corrections at the upper critical dimension. We give both theoretical and numerical evidence that above the upper critical dimension the decay of the critical spin-spin correlation function in finite systems consists of two different regimes. For one-dimensional systems our estimates for the critical couplings are more than two orders of magnitude more accurate than existing estimates. In two and three dimensions we give, to our knowledge, the first results for the critical couplings.
Cite
@article{arxiv.cond-mat/9704016,
title = {Classical critical behavior of spin models with long-range interactions},
author = {Erik Luijten and Henk W. J. Blöte},
journal= {arXiv preprint arXiv:cond-mat/9704016},
year = {2009}
}
Comments
20 pages RevTeX, 9 PostScript figures. Uses epsf.sty. Corrected scaling analysis at the upper critical dimension, in particular Eqs. (13a) and (13b). Also available as PostScript and PDF file at http://www.tn.tudelft.nl/tn/erikpubs.html