Central mode and spin confinement near the boundary of the superconducting phase in YBa2Cu3O6.353 (Tc=18 K)

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dc.contributor.authorBirgeneau, R. J.
dc.contributor.authorBroholm, C.
dc.contributor.authorLiang, R.
dc.contributor.authorYamani, Z.
dc.contributor.authorBonn, D.
dc.contributor.authorTun, Z.
dc.contributor.authorChung, J.-H.
dc.contributor.authorHardy, W. N.
dc.contributor.authorStock, C.
dc.contributor.authorBuyers, W.J.L.
dc.date.accessioned2010-01-07T21:07:43Z
dc.date.available2010-01-07T21:07:43Z
dc.date.issued2006-03-01
dc.description.abstractWe have mapped the neutron scattering spin spectrum at low energies in YBa2Cu3O6.353 (Tc=18 K), where the doping ~0.06 is near the critical value (pc=0.055) for superconductivity. No coexistence with long-range-ordered antiferromagnetism is found. The spins fluctuate on two energy scales: one a damped spin response with a ≃2 meV relaxation rate and the other a central mode with a relaxation rate that slows to less than 0.08 meV below Tc. The spectrum mirrors that of a soft mode driving a central mode. Extremely short correlation lengths, 42±5 Å in-plane and 8±2 Å along the c direction, and isotropic spin orientations for the central mode indicate that the correlations are subcritical with respect to any second-order transition to Neel order. The dynamics follows a model where damped spin fluctuations are coupled to the slow fluctuations of regions with correlations shortened by the hole doping.en_US
dc.identifier.citationPhysical Review B (Condensed Matter and Materials Physics) 1 March 2006, vol.73, no.10, pp. 100504-1-4en_US
dc.identifier.urihttp://jhir.library.jhu.edu/handle/1774.2/33755
dc.language.isoen_USen_US
dc.publisherAmerican Physical Societyen_US
dc.subjectsecond-order transitionen_US
dc.subjectisotropic spin orientationsen_US
dc.subjectneutron diffractionen_US
dc.subjectdopingen_US
dc.subjectsoft modesen_US
dc.subjectdamped spin responseen_US
dc.subjectbarium compoundsen_US
dc.subjectNeel orderen_US
dc.subjecthigh-temperature superconductorsen_US
dc.subjectyttrium compoundsen_US
dc.subjectspin dynamicsen_US
dc.subjectneutron scatteringen_US
dc.subjectYBa2Cu3O6.353en_US
dc.titleCentral mode and spin confinement near the boundary of the superconducting phase in YBa2Cu3O6.353 (Tc=18 K)en_US
dc.typeArticleen_US
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