Influence of quantum fluctuations on the Néel temperature of a dilute two-dimensional anisotropic antiferromagnet |
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| Authors: | S S Aplesnin |
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| Institution: | (1) L. V. Kirenskii Institute of Physics, Siberian Branch of the Russian Academy of Sciences, 660036 Krasnoyarsk, Russia |
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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).
Fiz. Tverd. Tela (St. Petersburg) 39, 898–900 (May 1997) |
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| Keywords: | |
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