Neutron-scattering study of the oxypnictide superconductor LaFeAsO0.87F0.13

Y. Qiu; M. Kofu; Wei Bao; S.-H. Lee; Q. Huang; T. Yildirim; J. R. D. Copley; J. W. Lynn; T. Wu; G. Wu; X. H. Chen

doi:10.1103/PhysRevB.78.052508

Author(s)

Y. Qiu
M. Kofu
S.-H. Lee
Q. Huang
T. Yildirim
J. R. D. Copley
J. W. Lynn
T. Wu
G. Wu
X. H. Chen

Detail(s)

Original language	English
Article number	052508
Journal / Publication	Physical Review B - Condensed Matter and Materials Physics
Volume	78
Issue number	5
Online published	26 Aug 2008
Publication status	Published - Aug 2008
Externally published	Yes

Link(s)

DOI	DOI https://doi.org/10.1103/PhysRevB.78.052508 Final Published version
	Check@CityULib
Link to Scopus	https://www.scopus.com/record/display.uri?eid=2-s2.0-50849087744&origin=recordpage
Permanent Link	https://scholars.cityu.edu.hk/en/publications/publication(51a163c0-5d6a-4dad-963e-961b7b9fe749).html

Abstract

The recently discovered superconductor LaO_0.87F_0.13FeAs (T_C≈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 T_C.

Citation Format(s)

[ RIS ] [ BibTeX ]

Neutron-scattering study of the oxypnictide superconductor LaFeAsO_0.87F_0.13. / Qiu, Y.; Kofu, M.; Bao, Wei et al.

In: Physical Review B - Condensed Matter and Materials Physics, Vol. 78, No. 5, 052508, 08.2008.

Research output: Journal Publications and Reviews (RGC: 21, 22, 62) › 21_Publication in refereed journal › peer-review

Qiu, Y, Kofu, M, Bao, W, Lee, S-H, Huang, Q, Yildirim, T, Copley, JRD, Lynn, JW, Wu, T, Wu, G & Chen, XH 2008, 'Neutron-scattering study of the oxypnictide superconductor LaFeAsO_0.87F_0.13', Physical Review B - Condensed Matter and Materials Physics, vol. 78, no. 5, 052508. https://doi.org/10.1103/PhysRevB.78.052508

Qiu, Y., Kofu, M., Bao, W., Lee, S-H., Huang, Q., Yildirim, T., Copley, J. R. D., Lynn, J. W., Wu, T., Wu, G., & Chen, X. H. (2008). Neutron-scattering study of the oxypnictide superconductor LaFeAsO_0.87F_0.13. Physical Review B - Condensed Matter and Materials Physics, 78(5), [052508]. https://doi.org/10.1103/PhysRevB.78.052508

Qiu Y, Kofu M, Bao W, Lee S-H, Huang Q, Yildirim T et al. Neutron-scattering study of the oxypnictide superconductor LaFeAsO_0.87F_0.13. Physical Review B - Condensed Matter and Materials Physics. 2008 Aug;78(5):052508. Epub 2008 Aug 26. doi: 10.1103/PhysRevB.78.052508

Qiu, Y. ; Kofu, M. ; Bao, Wei et al. / Neutron-scattering study of the oxypnictide superconductor LaFeAsO_0.87F_0.13. In: Physical Review B - Condensed Matter and Materials Physics. 2008 ; Vol. 78, No. 5.