Magnetic order in ferromagnetically coupled spin ladders

Abstract

A model of coupled antiferromagnetic spin-1/2 Heisenberg ladders is studied with numerical techniques. In the case of ferromagnetic interladder coupling we find that the dynamic and static structure factor has a peak at $(\pi ,\pi /2)$ where the first (second) direction is along (transversal) to the ladders. Besides, we suggest that the intensity of this peak and the spin-spin correlation at the maximum distance along the ladder direction remain finite in the bulk limit for strong enough interladder coupling. We discuss the relevance of these results for magnetic compounds containing ladders coupled in a trellis lattice and for the stripe scenario in high-T${}_c$ superconducting cuprates.

6 pages, 7 psfigs- Final version to be published in Phys. Rev. B

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Cited by in corpus (8)

• Stripe order, depinning, and fluctuations in La${}_{1.875}$Ba${}_{0.125}$CuO${}_4$ and La${}_{1.875}$Ba${}_{0.075}$Sr${}_{0.050}$CuO${}_4$
• Unifying Magnons and Triplons in Stripe-Ordered Cuprate Superconductors
• Field-Induced Quantum Criticality of Systems with Ferromagnetically Coupled Structural Spin Units
• Magnetic Excitations of Coupled Spin Ladders: a Quantum Monte Carlo Study
• Evidence for site-centered stripes from magnetic excitations in CuO superconductors
• Effects of interladder couplings in the trellis lattice
• Magnetic Excitations in the Site-Centered Stripe Phase: Spin Wave Theory of Coupled Three-Leg Ladders
• Semi-Dirac spin liquids and frustrated quantum magnetism on the trellis lattice