As<mml:mprescripts/><mml:none/>75NMR Studies of SuperconductingLaFeAsO0.9F0.1

2008/05/31 by H. -J. Grafe, H.‐J. Grafe, D. Paar +14 · 8 citations
Materials Science · Physics and Astronomy · #Iron-based superconductors research #Physics of Superconductivity and Magnetism #Rare-earth and actinide compounds #cond-mat.str-el #cond-mat.supr-con

paper · pdf · doi:10.1103/physrevlett.101.047003

published as Phys. Rev. Lett. 101, 047003 (2008)

openalex publication_date 2008/07/24 · arxiv created 2008/08/07 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/28

Abstract

We have performed 75As nuclear magnetic resonance measurements on aligned powders of the new LaFeAsO0.9F0.1 superconductor. In the normal state, we find a strong temperature dependence of the spin shift and Korringa behavior of the spin lattice relaxation rate. In the superconducting state, we find evidence for line nodes in the superconducting gap and spin-singlet pairing. Our measurements reveal a strong anisotropy of the spin lattice relaxation rate, which suggests that superconducting vortices contribute to the relaxation rate when the field is parallel to the c axis but not for the perpendicular direction.

Cited by

• Superfluid density and penetration depth in the iron pnictides
• Determination of the pairing state in iron-based superconductors through neutron scattering
• Q-scan analysis of the neutron scattering in iron-based superconductors
• Magnetic and superconducting transitions inBa1−xKxFe2As2studied by specific heat
• Nodes in the gap function of LaFePO, the gap function of the Fe(Se,Te) systems, and the STM signature of thes±pairing
• CeFePO: A Heavy Fermion Metal with Ferromagnetic Correlations
• MULTIPLE SUPERCONDUCTING GAPS, ANISOTROPIC SPIN FLUCTUATIONS AND SPIN-ORBIT COUPLING IN IRON-PNICTIDES
• Possible pairing states of the Fe-based superconductors
• Experimental consequences of thes-wavecos(kx)cos(ky)superconductivity in the iron pnictides