Bound spinons in an antiferromagnetic S=1/2 chain with a staggered field

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dc.contributor.authorKenzelmann, M.
dc.contributor.authorChen, Y.
dc.contributor.authorBroholm, C.
dc.contributor.authorReich, D.H.
dc.contributor.authorQiu, Y.
dc.date.accessioned2010-01-07T21:10:30Z
dc.date.available2010-01-07T21:10:30Z
dc.date.issued2004-07-02
dc.description.abstractInelastic neutron scattering was used to measure the magnetic field dependence of spin excitations in the antiferromagnetic S=1/2 chain CuCl2·2(dimethylsulfoxide) in the presence of uniform and staggered fields. Dispersive bound states emerge from a zero-field two-spinon continuum with different finite energy minima at wave numbers q=π and qi≈π(1-2<Sz>). The ratios of the field dependent excitation energies are in excellent agreement with predictions for breather and soliton solutions to the quantum sine-Gordon model, the proposed low-energy theory for S=1/2 chains in a staggered field. The data are also consistent with the predicted soliton and n=1,2 breather polarizations and scattering cross sections.en_US
dc.identifier.citationPhysical Review Letters 2 July 2004, vol.93, no.1, pp. 017204/1-4en_US
dc.identifier.urihttp://jhir.library.jhu.edu/handle/1774.2/33756
dc.language.isoen_USen_US
dc.publisherAmerican Physical Societyen_US
dc.subjectstaggered fielden_US
dc.subjectbound spinonsen_US
dc.subjectantiferromagnetic S = 1/2 chainen_US
dc.subjectspin dynamicsen_US
dc.subjectsolitonsen_US
dc.subjectsine-Gordon equationen_US
dc.subjectneutron diffractionen_US
dc.subjectspin excitationsen_US
dc.subjectCuCl2·2(dimethylsulfoxide)en_US
dc.subjectzero-field two-spinon continuumen_US
dc.subjectmolecular magnetismen_US
dc.subjectcopper compoundsen_US
dc.subjectbound statesen_US
dc.subjectantiferromagnetic materialsen_US
dc.subjectfinite energy minimaen_US
dc.subjectbreather solutionsen_US
dc.subjectsoliton solutionsen_US
dc.subjectquantum sine-Gordon modelen_US
dc.titleBound spinons in an antiferromagnetic S=1/2 chain with a staggered fielden_US
dc.typeArticleen_US
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