Antiferromagnetic fluctuations in the normal state of LiFeAs

Abstract

We present a detailed study of 75As NMR Knight shift and spin-lattice relaxation rate in the normal state of stoichiometric polycrystalline LiFeAs. Our analysis of the Korringa relation suggests that LiFeAs exhibits strong antiferromagnetic fluctuations, if transferred hyperfine coupling is a dominant interaction between 75As nuclei and Fe electronic spins, whereas for an on-site hyperfine coupling scenario, these are weaker, but still present to account for our experimental observations. Density-functional calculations of electric field gradient correctly reproduce the experimental values for both 75As and 7Li sites.

5 pages, 3 figures, thoroughly revised version with refined experimental data, accepted for publication as a Rapid Communication in Physical Review B.

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Cited by in corpus (43)

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• High-temperature superconductivity in iron-based materials
• Gap symmetry and structure of Fe-based superconductors
• Functional Renormalization Group for multi-orbital Fermi Surface Instabilities
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• Using Gap Symmetry and Structure to Reveal the Pairing Mechanism in Fe-based Superconductors
• Spin fluctuations in LiFeAs observed by neutron scattering
• Nodeless vs nodal order parameters in LiFeAs and LiFeP superconductors
• Fishtail effect and vortex dynamics in LiFeAs single crystals
• ${}^{75}$As NQR and NMR studies of superconductivity and electron correlations in iron arsenide Li${}_x$FeAs
• A perspective on pnictide superconductors
• 77Se NMR study of pairing symmetry and spin dynamics in KyFe2-xSe2
• Time of life as it is in LiFeAs
• Sign inversion in the superconducting order parameter of LiFeAs inferred from Bogoliubov quasiparticle interference
• Impurities in multiband superconductors
• NMR evidence of strong-correlated superconductivity in LiFeAs: tuning toward an SDW ordering
• Competing Magnetic Fluctuations in Iron Pnictide Superconductors: Role of Ferromagnetic Spin Correlations Revealed by NMR
• Contrasts in electron correlations and inelastic scattering between LiFeAs and LiFeP revealed by charge transport
• 75As NMR-NQR study in superconducting LiFeAs
• Two-electronic component behavior in the multiband FeSe${}_{0.42}$Te${}_{0.58}$ superconductor
• Raman Scattering Study of the Lattice Dynamics of Superconducting LiFeAs
• Local spin fluctuations in iron-based superconductors: 77Se and 87Rb NMR measurements of Tl0.47Rb0.34Fe1.63Se2
• Anomalous superconducting state in LiFeAs implied by the ${}^{75}$As Knight shift measurement
• Enhanced superconducting transition temperature in hyper-interlayer-expanded FeSe despite the suppressed electronic nematic order and spin fluctuations
• Superconductivity and normal state properties of single-crystalline Tl0.47Rb0.34Fe1.63Se2 as seen via 77Se and 87Rb NMR
• Quasiclassical description of a superconductor with a spin density wave
• Anomalous hysteresis as an evidence for a magnetic field-induced chiral superconducting state in LiFeAs
• Incommensurate spin-density wave and multiband superconductivity in Na${}_x$FeAs as revealed by nuclear magnetic resonance
• Review of nuclear magnetic resonance studies on iron-based superconductors
• Probing the Order Parameter of Superconducting LiFeAs using Pb/LiFeAs and Au/LiFeAs Point-Contact Spectroscopy
• Coexistence of antiferromagnetic and ferromagnetic spin correlations in Ca(Fe1-xCox)2As2 revealed by 75As nuclear magnetic resonance
• Pairing mechanism in Fe pnictide superconductors
• Coexistence of localized and itinerant magnetism in intercalated iron-selenide (Li,Fe)OHFeSe
• Spontaneous appearance of nonzero momentum Cooper pairing: Possible application to the iron-pnictides
• Absence of strong magnetic fluctuations or interactions in the normal state of LaNiGa${}_2$
• Nearly ferromagnetic metal state in the collapsed tetragonal phase of YFe${}_2$(Ge,Si)${}_2$
• 31P NMR Investigation of the Superconductor LiFeP (Tc = 5 K)
• Superconducting dome in doped 2D superconductors with broken inversion symmetry
• Evolution of magnetic fluctuations through the Fe-induced paramagnetic to ferromagnetic transition in Cr${}_2$B
• Hole-$s_{\pm }$ State Induced by Coexisting Ferro- and Aniferromagnetic and Aniferro-orbital Fluctuations in the Iron Pnictides
• Intersubband pairing induced Fulde-Ferrell phase in metallic nanofilms
• Nodal superconducting gap in LiFeP revealed by NMR: contrast with LiFeAs
• Unusual antiferromagnetic order and fluctuations in RbMn${}_6$Bi${}_5$