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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_US
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_US
dc.language.isoen_USen_US
dc.publisherAmerican Physical Societyen_US
dc.subjectfrustrated ladderen_US
dc.subjectspinonsen_US
dc.subjectfrustrated quantum magnetsen_US
dc.subjectmagnetization plateauen_US
dc.subjectmagnonsen_US
dc.subjectisotropic Heisenberg interactionen_US
dc.subjectelementary excitationsen_US
dc.subjectanisotropic interactionen_US
dc.subjectdensity matrix renormalization group calculationen_US
dc.subjectDzyaloshinskii-Moriya interactionen_US
dc.titleCondensation of magnons and spinons in a frustrated ladderen_US
dc.typeArticleen_US


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