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Paper detail

Perturbation expansion for the diluted two-dimensional XY model

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.

preprint2006arXivOpen access
Oleksandr KapikranianBertrand BercheYurij Holovatch
cond-mat.stat-mech
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Oleksandr KapikranianBertrand BercheYurij Holovatch

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