Neutron-scattering study of the oxypnictide superconductorLaFeAsO0.87F0.13

2008/05/07 by Yiming Qiu, Y. Qiu, M. Kofu +14 · 55 citations
Materials Science · Physics and Astronomy · #Condensed matter physics #Coupling (piping) #Inelastic neutron scattering #Iron-based superconductors research #Materials science #Neutron scattering #Pairing #Physics #Physics of Superconductivity and Magnetism #Quantum mechanics #Rare-earth and actinide compounds #Scattering #Superconductivity #cond-mat.supr-con

paper · pdf · doi:10.1103/physrevb.78.052508

published in Physical Review B 78(5) (American Physical Society) · 4 pages, 4 figures

arxiv created 2008/05/07 · openalex publication_date 2008/08/26 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05

Abstract

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

Citations

• Correlated Electronic Structure ofLaO1−xFxFeAs
• Superconducting Properties of the Fe-Based Layered SuperconductorLaFeAsO0.9F0.1−δ
• Competing orders and spin-density-wave instability in La(O 1−x F x )FeAs
• Spin Resonance in thed-Wave SuperconductorCeCoIn5
• Superconductivity at 43 K in SmFeAsO1-xF x
• Superconductivity at 25 K in hole-doped (La 1-x Sr x )OFeAs
• Pressure effect on superconducting properties of LaO1-xFxFeAs (x=0.11) superconductor
• Upper critical field, Hall effect and magnetoresistance in the iron-based layered superconductor LaFeAsO0.9F0.1−δ
• A generic two-band model for unconventional superconductivity and spin-density-wave order in electron- and hole-doped iron-based superconductors
• Superconductivity in the iron-based F-doped layered quaternary compound Nd[O 1 − x F x ]FeAs
• Origin of the 150-K Anomaly in LaFeAsO: Competing Antiferromagnetic Interactions, Frustration, and a Structural Phase Transition
• Phonon Density of States inMgB2

Cited by

• Theoretical approach to resonant inelastic x-ray scattering in iron-based superconductors at the energy scale of the superconducting gap
• Impurity Effects in Sign-Reversing Fully Gapped Superconductors: Analysis of FeAs Superconductors
• Proposal to determine the Fermi-surface topology of a doped iron-based superconductor using bulk-sensitive Fourier-transform Compton scattering
• Impurity-induced in-gap state andTcin sign-reversing s-wave superconductors: analysis of iron oxypnictide superconductors