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- W1505086170 abstract "Inelastic neutron scattering from superconducting (SC) $text{Ba}{({text{Fe}}_{0.926}{text{Co}}_{0.074})}_{2}{text{As}}_{2}$ reveals anisotropic and quasi-two-dimensional (2D) magnetic excitations close to ${mathbf{Q}}_{text{AFM}}=(frac{1}{2}frac{1}{2})$ - the 2D antiferromagnetic (AFM) wave vector of the parent ${text{BaFe}}_{2}{text{As}}_{2}$ compound. The correlation length anisotropy of these low-energy fluctuations is consistent with spin nematic correlations in the ${J}_{1}text{ensuremath{-}}{J}_{2}$ model with ${J}_{1}/{J}_{2}ensuremath{sim}1$. The spin resonance at $ensuremath{sim}8.3text{ }text{meV}$ in the SC state displays the same anisotropy. The anisotropic fluctuations experimentally evolve into two distinct maxima only along the direction transverse to ${mathbf{Q}}_{text{AFM}}$ above $ensuremath{sim}80text{ }text{meV}$ indicating unusual quasipropagating excitations." @default.
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- W1505086170 date "2010-10-12" @default.
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- W1505086170 title "Anisotropic and quasipropagating spin excitations in superconducting<mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML display=inline><mml:mrow><mml:mtext>Ba</mml:mtext><mml:msub><mml:mrow><mml:mrow><mml:mo>(</mml:mo><mml:mrow><mml:msub><mml:mrow><mml:mtext>Fe</mml:mtext></mml:mrow><mml:mrow><mml:mn>0.926</mml:mn></mml:mrow></mml:msub><mml:msub><mml:mrow><mml:mtext>Co</mml:mtext></mml:mrow><mml:mrow><mml:mn>0.074</mml:mn></mml:mrow></mml:msub></mml:mrow><mml:mo>)</mml:mo></mml:mrow></…" @default.
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- W1505086170 doi "https://doi.org/10.1103/physrevb.82.140503" @default.
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