Perturbation expansion for the diluted two-dimensional XY model

Details Perturbation expansion for the diluted two-dimensional XY model Perturbation expansion for the diluted two-dimensional XY model

2006-11-28

arxiv.org/abs/cond-mat/0611712v1

Physics Letters A 366 (2007) 150-154

Physics

Condensed Matter

Statistical Mechanics

8 pages, 1 eps figure, style file included

Scientific paper

10.1016/j.physleta.2007.01.075

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.

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