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dc.contributor.authorFouet, J.-B.
dc.contributor.authorMila, F.
dc.contributor.authorClarke, D.
dc.contributor.authorYouk, H.
dc.contributor.authorTchernyshyov, O.
dc.contributor.authorFendley, P.
dc.contributor.authorNoack, R.M.
dc.date.accessioned2010-01-08T20:56:02Z
dc.date.available2010-01-08T20:56:02Z
dc.date.issued2006-06-01
dc.identifier.citationPhysical Review B (Condensed Matter and Materials Physics) 1 June 2006, vol.73, no.21, pp. 214405-1-13en
dc.identifier.urihttp://jhir.library.jhu.edu/handle/1774.2/33758
dc.description.abstractMotivated by the ever-increasing experimental effort devoted to the properties of frustrated quantum magnets in a magnetic field, we present a careful and detailed theoretical analysis of a one-dimensional version of this problem, a frustrated ladder with a magnetization plateau at m=1/2. We show that even for purely isotropic Heisenberg interactions, the magnetization curve exhibits a rather complex behavior that can be fully accounted for in terms of simple elementary excitations. The introduction of anisotropic interactions (e.g., Dzyaloshinskii-Moriya interactions) modifies significantly the picture and reveals an essential difference between integer and fractional plateaus. In particular, anisotropic interactions generically open a gap in the region between the plateaus, but we show that this gap closes upon entering fractional plateaus. All of these conclusions, based on analytical arguments, are supported by extensive density matrix renormalization group calculations.en
dc.language.isoen_USen
dc.publisherAmerican Physical Societyen
dc.subjectfrustrated ladderen
dc.subjectspinonsen
dc.subjectfrustrated quantum magnetsen
dc.subjectmagnetization plateauen
dc.subjectmagnonsen
dc.subjectisotropic Heisenberg interactionen
dc.subjectelementary excitationsen
dc.subjectanisotropic interactionen
dc.subjectdensity matrix renormalization group calculationen
dc.subjectDzyaloshinskii-Moriya interactionen
dc.titleCondensation of magnons and spinons in a frustrated ladderen
dc.typeArticleen


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