Low Temperature Behavior and Crossovers of the Square Lattice Quantum Heisenberg Antiferromagnet
作者： Jae-Kwon Kim , Matthias Troyer
DOI: 10.1103/PHYSREVLETT.80.2705
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摘要: We present thermodynamic measurements of various physical observables the two-dimensional $S\phantom{\rule{0ex}{0ex}}=\phantom{\rule{0ex}{0ex}}1/2$ isotropic quantum Heisenberg antiferromagnet on a square lattice, obtained by Monte Carlo methods. The results are in excellent agreement with field-theoretical predictions. issue existence crossover from critical to renormalized classical regime is clarified.
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