Ising magnets with mobile defects
Condensed Matter
2009-11-07 v2
Abstract
Motivated by recent experiments on cuprates with low-dimensional magnetic interactions, a new class of two-dimensional Ising models with short-range interactions and mobile defects is introduced and studied. The non-magnetic defects form lines, which, as temperature increases, first meander and then become unstable. Using Monte Carlo simulations and analytical low- and high-temperature considerations, the instability of the defect stripes is monitored for various microscopic and thermodynamic quantities in detail for a minimal model, assuming some of the couplings to be indefinitely strong. The robustness of the findings against weakening the interactions is discussed as well.
Cite
@article{arxiv.cond-mat/0208562,
title = {Ising magnets with mobile defects},
author = {W. Selke and V. L. Pokrovsky and B. Buechner and T. Kroll},
journal= {arXiv preprint arXiv:cond-mat/0208562},
year = {2009}
}