Neutron scattering study of the oxypnictide superconductor La(O,F)FeAs

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dc.creatorQiu, Y.
dc.creatorKofu, M.
dc.creatorBao, Wei
dc.creatorLee, S. -H.
dc.creatorHuang, Q.
dc.creatorYildirim, T.
dc.creatorCopley, J. R. D.
dc.creatorLynn, J. W.
dc.creatorWu, T.
dc.creatorWu, G.
dc.creatorChen, X. H.
dc.date2008-05-07
dc.date.accessioned2026-07-07T09:58:04Z
dc.date.available2026-07-07T09:58:04Z
dc.descriptionThe newly discovered superconductor La(O,F)FeAs (Tc = 26 K) was investigated using the neutron scattering technique. No spin-density-wave (SDW) order was observed in the normal state nor in the superconducting state, both with and without an applied magnetic field of 9 T, consistent with the proposal that SDW and superconductivity are competing in the laminar materials. While our inelastic measurements offer no constraints on the spin dynamic response from d-wave pairing, an upper limit for the magnetic resonance peak predicted from an extended s-wave pairing mechanism is provided. Our measurements also support the energy scale of the calculated phonon spectrum which is used in electron-phonon coupling theory, and fails to produce the high observed Tc.
dc.description4 pages, 4 figures
dc.identifierhttps://arxiv.org/abs/0805.1062
dc.identifierhttp://arxiv.org/abs/0805.1062
dc.identifierPhys. Rev. B 78, 052508 (2008)
dc.identifierdoi:10.1103/PhysRevB.78.052508
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/167580
dc.subjectSuperconductivity
dc.titleNeutron scattering study of the oxypnictide superconductor La(O,F)FeAs
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