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.
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Received 22 August 2002 / Received in final form 4 October 2002 Published online 19 November 2002
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Selke, W., Pokrovsky, V., Büchner, B. et al. Ising magnets with mobile defects. Eur. Phys. J. B 30, 83–92 (2002). https://doi.org/10.1140/epjb/e2002-00361-0
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DOI: https://doi.org/10.1140/epjb/e2002-00361-0