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- W2002183362 abstract "The spin correlations of the S=1 Heisenberg antiferromagnetic chains in ${mathrm{AgVP}}_{2}$${mathrm{S}}_{6}$ have been studied by neutron scattering at temperatures of the order of Tensuremath{sim}${10}^{mathrm{ensuremath{-}}2}$ J/${mathit{k}}_{mathit{B}}$. On the polycrystalline samples, with a careful choice of experimental conditions, we have observed a Haldane gap of ${mathit{E}}_{mathit{g}}$=26 meV at the antiferromagnetic point at q=ensuremath{pi}. The excitation spectra are consistent with a mode that has a spin-wave velocity C=150 meV and a correlation length ensuremath{xi}ensuremath{approxeq}5.5, close to C/${mathit{E}}_{mathit{g}}$. These results are in quantitative agreement with the predictions and numerical results on the Haldane state." @default.
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- W2002183362 date "1991-07-22" @default.
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- W2002183362 title "Dynamic structure factor [<i>S</i>(<i>Q</i>,ω)] of the<i>S</i>=1 quasi-one-dimensional Heisenberg antiferromagnet: Neutron-scattering study on<mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML display=inline><mml:mrow><mml:msub><mml:mrow><mml:mi mathvariant=normal>AgVP</mml:mi></mml:mrow><mml:mrow><mml:mn>2</mml:mn></mml:mrow></mml:msub></mml:mrow></mml:math><mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML display=inline><mml:mrow><mml:msub><mml:mrow><mml:mi mathvariant=…" @default.
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- W2002183362 doi "https://doi.org/10.1103/physrevlett.67.497" @default.
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