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Träfflista för sökning "WFRF:(Kotani A) srt2:(2005-2009)"

Search: WFRF:(Kotani A) > (2005-2009)

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1.
  • Duda, L.-C., et al. (author)
  • Resonant inelastic X-ray scattering at the NiO O K-resonance: non-local charge-transfer and double singlet excitations
  • 2007
  • In: MAX-lab. - Lund : MAX-lab. ; , s. 270-271
  • Book chapter (other academic/artistic)abstract
    • NiO is one of the prototypical compounds that has highlighted the importance of correlation effects in transition metal oxides. Core level spectroscopies bear evidence for the highly correlated nature of low energy excitations. For instance, the asymmetry of the Ni2p-line shape has been attributed to non-local charge transfer excitations and multi-site cluster calculations show that solidstate effects generally are appreciable for correlated materials, such as cuprates and high Tc-compounds.....
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3.
  • Duda, Laurent, et al. (author)
  • Resonant Inelastic X-Ray Scattering at the Oxygen K Resonance of NiO: Nonlocal Charge Transfer and Double-Singlet Excitations
  • 2006
  • In: Physical Review Letters. - 0031-9007 .- 1079-7114. ; 96:067402
  • Journal article (peer-reviewed)abstract
    • We report high-resolution polarization-dependent resonant inelastic x-ray scattering (RIXS) at the O K resonance of NiO showing a rich excitation spectrum. We perform multisite Ni6O19 cluster model calculations, revealing that solid state effects are substantial. We identify a nonlocal charge transfer excitation at 4–5 eV and double-singlet creation at 1.75 eV, both exhibiting significant scattering geometry dependence. Apart from an intense band of local charge transfer excitations (above 5 eV) also dd excitations at 1 eV are observed. Finally, we point out that O K RIXS of correlated metal oxides allows a quantitative and consistent determination of the charge transfer energy and the Hund coupling energy JH.
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  • Result 1-3 of 3

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