Magnetic Order-Disorder Transition in the Two-Dimensional Spatially Anisotropic Heisenberg Model at Zero Temperature

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dc.creatorIhle, D.
dc.creatorSchindelin, C.
dc.creatorWeisse, A.
dc.creatorFehske, H.
dc.date1999-04-01
dc.date1999-05-10
dc.date.accessioned2026-07-07T03:13:09Z
dc.date.available2026-07-07T03:13:09Z
dc.descriptionThe ground-state properties of the spin-1/2 antiferromagnetic Heisenberg model with spatially anisotropic couplings on a square lattice are investigated by a spin-rotation-invariant Green's-function approach and by Lanczos diagonalizations on lattices up to 36 sites supplemented by finite-size scaling. We focus on the anisotropy-driven transition from the Néel state to a paramagnetic state with antiferromagnetic short-range order and on the spatial dependence of spin correlation functions. Our principal result is that a rather sharp crossover in the magnetic behavior occurs at the coupling ratio $R_0\simeq 0.2$ ($R=J_y/J_x$).
dc.description4 pages, 4 figures
dc.identifierhttps://arxiv.org/abs/cond-mat/9904005
dc.identifierhttp://arxiv.org/abs/cond-mat/9904005
dc.identifierPhys. Rev. B 60, 9240 (1999)
dc.identifierdoi:10.1103/PhysRevB.60.9240
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/29189
dc.subjectStrongly Correlated Electrons
dc.titleMagnetic Order-Disorder Transition in the Two-Dimensional Spatially Anisotropic Heisenberg Model at Zero Temperature
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