Magnetic order in ferromagnetically coupled spin ladders

Details Magnetic order in ferromagnetically coupled spin ladders Magnetic order in ferromagnetically coupled spin ladders

1999-11-17

arxiv.org/abs/cond-mat/9911271v2

Physics

Condensed Matter

Strongly Correlated Electrons

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

Scientific paper

10.1103/PhysRevB.62.928

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.

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