19-F NMR Investigation of Iron-pnictide Superconductor LaFeAsO(0.89)F(0.11)

Abstract

We report 19-F NMR investigation of the new high temperature superconductor LaFeAsO(0.89)F(0.11) (Tc ~ 28K). We demonstrate that low frequency spin fluctuations exhibit pseudo gap behavior above Tc. We also deduce the London penetration depth lambda from NMR line broadening below Tc.

Accepted for publication in Phys. Rev. B (Rapid) with the original submission date

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• Electronic Structure of Fe-Based Superconductors
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• Properties of a two orbital model for oxypnictide superconductors: Magnetic order, B_2g spin-singlet pairing channel, and its nodal structure
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• Nuclear magnetic relaxation and superfluid density in Fe-pnictide superconductors: An anisotropic \pm s-wave scenario
• Scanning tunneling spectroscopy of SmFeAsO0.85: Possible evidence for d-wave order parameter symmetry
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• Normal State Correlated Electronic Structure of Iron Pnictides
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• Evidence for electromagnetic granularity in the polycrystalline iron-based superconductor LaO0.89F0.11FeAs
• Point-contact Andreev-reflection spectroscopy in ReFeAsO_{1-x}F_x (Re = La, Sm): Possible evidence for two nodeless gaps
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• Influence of the Nd $4f$ states on the magnetic behavior and the electric field gradient of the oxypnictides superconductors NdFeAsO${}_{1-x}$F${}_x$
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• Effect of the chemical pressure on superconductivity and SDW in undoped and 15%F doped La1-yYyFeAsO compounds
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• Unconventional superconductivity originating from disconnected Fermi surfaces in the iron-based compound