Spin correlation functions and Néel order in the 2D Heisenberg model: Effects of spatial anisotropy

Abstract

The ground-state properties of the square-lattice spin-1/2 Heisenberg antiferromagnet with spatially anisotropic couplings are investigated by Green's-function projection approaches. The staggered magnetization and the two-spin correlators are calculated; the competition between magnetic long- and short-range order is discussed in comparison with experiments on $\mathrm{S}{\mathrm{r}}_2[\mathrm{C}{\mathrm{a}}_2]\mathrm{Cu}{\mathrm{O}}_3$.

2 pages, 2 figues, Proceedings Yamada Conference on Strongly Correlated Electron Systems, Nagano, Japan 1999

References in corpus (4)

• Electronic structure and magnetic properties of the linear chain cuprates Sr_2CuO_3 and Ca_2CuO_3
• A Plane of Weakly Coupled Heisenberg Chains: Theoretical Arguments and Numerical Calculations
• Realization of a Spin liquid in a Two Dimensional Quantum Antiferromagnet
• Magnetic Order-Disorder Transition in the Two-Dimensional Spatially Anisotropic Heisenberg Model at Zero Temperature