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Influence of quantum fluctuations on the Néel temperature of a dilute two-dimensional anisotropic antiferromagnet

  • Magnetism and Ferroelectricity
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Abstract

A quantum Monte Carlo procedure is used to calculate the energy, sublattice magnetization, Néel temperature, and the slopes of the S=[1/T N(x=0)]dT N(x)/dx curves as functions of the hole concentration and the exchange anisotropy Δ=1−J x,y/J z in the Heisenberg model with anisotropic negative interactions between nearest neighbors in a square lattice with dilution among the lattice sites. The slope diverges in the limit Δ→0: S∼ln(6.5/Δ).

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Authors and Affiliations

  1. L. V. Kirenskii Institute of Physics, Siberian Branch of the Russian Academy of Sciences, 660036, Krasnoyarsk, Russia

    S. S. Aplesnin

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  1. S. S. Aplesnin
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Fiz. Tverd. Tela (St. Petersburg) 39, 898–900 (May 1997)

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Aplesnin, S.S. Influence of quantum fluctuations on the Néel temperature of a dilute two-dimensional anisotropic antiferromagnet. Phys. Solid State 39, 800–802 (1997). https://doi.org/10.1134/1.1130121

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  • DOI: https://doi.org/10.1134/1.1130121

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