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- W2006033957 abstract "The NMR results in iron pnictides BaFe${}_{2}$(As${}_{1ensuremath{-}x}$P${}_{x}$)${}_{2}$ and Ba(Fe${}_{1ensuremath{-}x}$Co${}_{x}$)${}_{2}$As${}_{2}$ are analyzed based on the self-consistent renormalization (SCR) spin-fluctuation theory. The temperature dependence of the NMR relaxation rate ${T}_{1}^{ensuremath{-}1}$ as well as the electrical resistivity is well reproduced by a SCR model where two-dimensional antiferromagnetic (AF) spin fluctuations are dominant. The successful description of the crossover feature from non-Fermi-liquid to Fermi-liquid behavior strongly suggests that low-lying spin fluctuations in BaFe${}_{2}$(As${}_{1ensuremath{-}x}$P${}_{x}$)${}_{2}$ and Ba(Fe${}_{1ensuremath{-}x}$Co${}_{x}$)${}_{2}$As${}_{2}$ possess an itinerant AF nature, and that chemical substitution in the two compounds tunes the distance of these systems to an AF quantum critical point. The close relationship between spin fluctuations and superconductivity is discussed compared with the other unconventional superconductors, cuprate and heavy fermion superconductors. In addition, it is suggested that magnetism and lattice instability in these pnictides are strongly linked via orbital degrees of freedom." @default.
- W2006033957 created "2016-06-24" @default.
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- W2006033957 date "2013-05-10" @default.
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- W2006033957 title "Normal-state spin dynamics in the iron-pnictide superconductors BaFe<mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML display=inline><mml:msub><mml:mrow /><mml:mn>2</mml:mn></mml:msub></mml:math>(As<mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML display=inline><mml:msub><mml:mrow /><mml:mrow><mml:mn>1</mml:mn><mml:mo>−</mml:mo><mml:mi>x</mml:mi></mml:mrow></mml:msub></mml:math>P<mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML display=inline><mml:msub><mml:mrow /><…" @default.
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- W2006033957 doi "https://doi.org/10.1103/physrevb.87.174507" @default.
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