Long-range correlations in the two-dimensional spin-(1/2 antiferromagnetic Heisenberg model: A quantum Monte Carlo study

作者：Efstratios Manousakis, Román Salvador · 发表于：Physical Review Letters · 年份：1988 · DOI：10.1103/physrevlett.60.840 · 被引用次数：75 · 研究领域：Physics of Superconductivity and Magnetism、Theoretical and Computational Physics、Advanced Condensed Matter Physics

Using an extended version of Handscomb's Monte Carlo method we study the spin-(1/2 quantum antiferromagnetic Heisenberg model on square lattices of various sizes. The calculated correlation length associated with antiferromagnetic order grows very rapidly as the temperature is lowered suggesting an essential singularity. Our results are consistent with those recently observed by neutron scattering done on ${\mathrm{Lo}}_{2}$${\mathrm{CuO}}_{4}$.