Effective actions for spin ladders

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dc.creatorDell'Aringa, S.
dc.creatorErcolessi, E.
dc.creatorMorandi, G.
dc.creatorPieri, P.
dc.creatorRoncaglia, M.
dc.date1996-10-18
dc.date1997-03-26
dc.date.accessioned2026-07-07T12:33:10Z
dc.date.available2026-07-07T12:33:10Z
dc.descriptionWe derive a path-integral expression for the effective action in the continuum limit of an AFM Heisenberg spin ladder with an arbitrary number of legs. The map is onto an $O(3)$ nonlinear $σ$-model (NL$σ$M) with the addition of a topological term that is effective only for odd-legged ladders and half-odd integer spins. We derive the parameters of the effective NL$σ$M and the behaviour of the spin gap for the case of even-legged ladders.
dc.descriptionFinal version, as published in Phys. Rev. Lett
dc.identifierhttps://arxiv.org/abs/cond-mat/9610148
dc.identifierhttp://arxiv.org/abs/cond-mat/9610148
dc.identifierPhys.Rev.Lett.78:2457,1997
dc.identifierdoi:10.1103/PhysRevLett.78.2457
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/217030
dc.subjectStrongly Correlated Electrons
dc.titleEffective actions for spin ladders
dc.typetext

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