Spin-singlet superconductivity with multiple gaps in PrFeAsO 0.89 F 0.11

2008/06/02 by K. Matano, Z. A. Ren, X. L. Dong +7 · 1 citation
Materials Science · Physics and Astronomy · #Atomic physics #Condensed matter physics #Iron-based superconductors research #Knight shift #Lattice (music) #Pairing #Physics #Physics of Superconductivity and Magnetism #Rare-earth and actinide compounds #Singlet state #Spin (aerodynamics) #Superconductivity #cond-mat.str-el #cond-mat.supr-con

paper · pdf · doi:10.1209/0295-5075/83/57001

published as Europhys. Lett. 83 (2008) 57001. · submitted on May 14

arxiv created 2008/06/02 · openalex publication_date 2008/07/30 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05

Abstract

We report 75 As and 19 F NMR studies on the superconducting properties of the newly discovered compound PrFeAsO 0.89 F 0.11 ( T c =45 K). The Knight shift in the direction of H ∥ ab -plane decreases below T c to almost zero, which indicates spin-singlet pairing. The temperature dependencies of both the Knight shift and the spin lattice relaxation rate indicate that there are two gaps opening below T c , with nodes in the gap function.

Citations

• Possible highT c superconductivity in the Ba?La?Cu?O system
• Correlated Electronic Structure ofLaO1−xFxFeAs
• Even Parity, Orbital Singlet, and Spin Triplet Pairing for SuperconductingLaFeAsO1−xFx
• F<mml:mprescripts/><mml:none/>19NMR investigation of the iron pnictide superconductorLaFeAsO0.89F0.11
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• Strong Correlations and Magnetic Frustration in the HighTcIron Pnictides
• Two-band superconductivity in LaFeAsO0.89F0.11 at very high magnetic fields
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• Superconductivity in the iron-based F-doped layered quaternary compound Nd[O 1 − x F x ]FeAs

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• Impurity-induced in-gap state andTcin sign-reversing s-wave superconductors: analysis of iron oxypnictide superconductors