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dc.contributor.authorKenzelmann, M.
dc.contributor.authorBatista, C. D.
dc.contributor.authorChen, Y.
dc.contributor.authorBroholm, C.
dc.contributor.authorReich, D.H.
dc.contributor.authorPark, S.
dc.contributor.authorQiu, Y.
dc.date.accessioned2010-01-07T20:26:42Z
dc.date.available2010-01-07T20:26:42Z
dc.date.issued2005-03-01
dc.identifier.citationPhysical Review B (Condensed Matter and Materials Physics) 1 March 2005, vol.71, no.9, pp. 94411-1-8en_US
dc.identifier.urihttp://jhir.library.jhu.edu/handle/1774.2/33753
dc.description.abstractWe report an experimental and theoretical study of the antiferromagnetic S=½ chain subject to uniform and staggered fields. Using inelastic neutron scattering, we observe a bound-spinon state at high energies in the linear chain compound CuCl2·2((CD3)2SO). The excitation is explained with a mean-field theory of interacting S=½ fermions and arises from the opening of a gap at the Fermi surface due to confining spinon interactions. The mean-field model also describes the wave-vector dependence of the bound-spinon states, particularly in regions where effects of the discrete lattice are important. We calculate the dynamic structure factor using exact diagonalization of finite length chains, obtaining excellent agreement with the experiments.en_US
dc.language.isoen_USen_US
dc.publisherAmerican Physical Societyen_US
dc.subjectdiscrete latticeen_US
dc.subjectstaggered fielden_US
dc.subjectbound-spinon stateen_US
dc.subjectspin dynamicsen_US
dc.subjectfermion systemsen_US
dc.subjectHeisenberg modelen_US
dc.subjectneutron scatteringen_US
dc.subjectlinear chain compounden_US
dc.subjectmean-field theoryen_US
dc.subjectspinon interactionsen_US
dc.subjectFermi surfaceen_US
dc.subjectcopper compoundsen_US
dc.subjectchlorine compoundsen_US
dc.subjectantiferromagnetic materialsen_US
dc.subjectwave-vectoren_US
dc.subjectdynamic structure factoren_US
dc.subjectexact diagonalizationen_US
dc.subjectfinite length chainen_US
dc.titleS=½ chain in a staggered field: high-energy bound-spinon state and the effects of a discrete latticeen_US
dc.typeArticleen_US


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