Perturbation expansion for the diluted two-dimensional XY model
Statistical Mechanics
2010-07-06 v1
Abstract
We study the quasi-long-range ordered phase of a 2D XY model with quenched site-dilution using the spin-wave approximation and expansion in the parameter which characterizes the deviation from completely homogeneous dilution. The results, obtained by keeping the terms up to the third order in the expansion, show good accordance with Monte Carlo data in a wide range of dilution concentrations far enough from the percolation threshold. We discuss different types of expansion.
Cite
@article{arxiv.cond-mat/0611712,
title = {Perturbation expansion for the diluted two-dimensional XY model},
author = {Oleksandr Kapikranian and Bertrand Berche and Yurij Holovatch},
journal= {arXiv preprint arXiv:cond-mat/0611712},
year = {2010}
}
Comments
8 pages, 1 eps figure, style file included