Condensation of magnons and spinons in a frustrated ladder

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dc.contributor.author Fouet, J.-B.
dc.contributor.author Mila, F.
dc.contributor.author Clarke, D.
dc.contributor.author Youk, H.
dc.contributor.author Tchernyshyov, O.
dc.contributor.author Fendley, P.
dc.contributor.author Noack, R.M.
dc.date.accessioned 2010-01-08T20:56:02Z
dc.date.available 2010-01-08T20:56:02Z
dc.date.issued 2006-06-01
dc.identifier.citation Physical Review B (Condensed Matter and Materials Physics) 1 June 2006, vol.73, no.21, pp. 214405-1-13 en
dc.identifier.uri http://jhir.library.jhu.edu/handle/1774.2/33758
dc.description.abstract Motivated 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
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dc.language.iso en_US en
dc.publisher American Physical Society en
dc.subject frustrated ladder en
dc.subject spinons en
dc.subject frustrated quantum magnets en
dc.subject magnetization plateau en
dc.subject magnons en
dc.subject isotropic Heisenberg interaction en
dc.subject elementary excitations en
dc.subject anisotropic interaction en
dc.subject density matrix renormalization group calculation en
dc.subject Dzyaloshinskii-Moriya interaction en
dc.title Condensation of magnons and spinons in a frustrated ladder en
dc.type Article en

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