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

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dc.contributor.author Birgeneau, R.J.
dc.contributor.author Broholm, C.
dc.contributor.author Liang, R.
dc.contributor.author Yamani, Z.
dc.contributor.author Bonn, D.
dc.contributor.author Tun, Z.
dc.contributor.author Chung, J.-H.
dc.contributor.author Hardy, W.N.
dc.contributor.author Stock, C.
dc.contributor.author Buyers, W.J.L.
dc.date.accessioned 2010-01-07T21:07:43Z
dc.date.available 2010-01-07T21:07:43Z
dc.date.issued 2006-03-01
dc.identifier.citation Physical Review B (Condensed Matter and Materials Physics) 1 March 2006, vol.73, no.10, pp. 100504-1-4 en
dc.identifier.uri http://jhir.library.jhu.edu/handle/1774.2/33755
dc.description.abstract We 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
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dc.description.provenance Made available in DSpace on 2010-01-07T21:07:43Z (GMT). No. of bitstreams: 1 Broholm Central 2006.pdf: 386794 bytes, checksum: 3dde83a6ccd1c6c88e7a432b2437f358 (MD5) Previous issue date: 2006-03-01 en
dc.language.iso en_US en
dc.publisher American Physical Society en
dc.subject second-order transition en
dc.subject isotropic spin orientations en
dc.subject neutron diffraction en
dc.subject doping en
dc.subject soft modes en
dc.subject damped spin response en
dc.subject barium compounds en
dc.subject Neel order en
dc.subject high-temperature superconductors en
dc.subject yttrium compounds en
dc.subject spin dynamics en
dc.subject neutron scattering en
dc.subject YBa2Cu3O6.353 en
dc.title Central mode and spin confinement near the boundary of the superconducting phase in YBa2Cu3O6.353 (Tc=18 K) en
dc.type Article en

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