Qiu, Y.
, Kofu, M.
, Bao, W.
, Lee, S.
, Huang, Q.
, Yildirim, T.
, Copley, J.
, Lynn, J.
, Wu, T.
, Wu, G.
and Chen, X.
(2008),
Neutron-scattering study of the oxypnictide superconductor LaFeAsO 0.87 F 0.13, Physical Review B, [online], https://doi.org/10.1103/PhysRevB.78.052508, https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=610004
(Accessed December 7, 2024)
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Neutron-scattering study of the oxypnictide superconductor LaFeAsO 0.87 F 0.13
Published
Author(s)
, M. Kofu, Wei Bao, S.-H. Lee, , , , , T. Wu, G. Wu, X. H. Chen
Abstract
The recently discovered superconductor LaO0.87F0.13FeAs (TC≈26 K) was investigated using the neutron-scattering technique. No spin-density-wave (SDW) order was observed in the normal state or 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 constraint on the spin dynamic response from a 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 the electron-phonon coupling theory and fails to produce the high observed TC.Citation
Physical Review B
Volume
78
Issue
5
Pub Type
Journals
Download Paper
Keywords
oxypnictide, high-Tc superconductor, neutron scattering
Citation
Issues
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Created August 26, 2008, Updated March 18, 2024