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Spin Dependence of Correlations in Two-Dimensional Quantum Heisenberg Antiferromagnets

N. Elstner·A. Sokol·R. R. P. Singh·M. Greven·R. J. Birgeneau
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Abstract

We present a series expansion study of spin-S square-lattice Heisenberg antiferromagnets. The numerical data are in excellent agreement with recent neutron scattering measurements. Our key result is that the correlation length for S>1/2 strongly deviates from the exact T->0 (renormalized classical, or RC) scaling prediction for all experimentally and numerically accessible temperatures. We note basic trends with S of the experimental and series expansion correlation length data and propose a scaling crossover scenario to explain them.

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N. Elstner, A. Sokol, R. R. P. Singh, M. Greven, R. J. Birgeneau. 1995-03-28. Spin Dependence of Correlations in Two-Dimensional Quantum Heisenberg Antiferromagnets. https://doi.org/10.1103/physrevlett.75.938

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