Resonant inelastic X-ray scattering at the oxygen K resonance of NiO: Nonlocal charge transfer and double-singlet excitations

L. C. Duda, T. Schmitt, M. Magnuson, J. Forsberg, A. Olsson, J. Nordgren, Kozo Okada, A. Kotani

Research output: Contribution to journalArticle

36 Citations (Scopus)

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 Δ and the Hund coupling energy JH.

Original languageEnglish
Article number067402
JournalPhysical Review Letters
Volume96
Issue number6
DOIs
Publication statusPublished - 2006

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charge transfer
oxygen
x ray scattering
scattering
excitation
inelastic scattering
x rays
metal oxides
solid state
energy
high resolution
polarization
geometry

ASJC Scopus subject areas

  • Physics and Astronomy(all)

Cite this

Resonant inelastic X-ray scattering at the oxygen K resonance of NiO : Nonlocal charge transfer and double-singlet excitations. / Duda, L. C.; Schmitt, T.; Magnuson, M.; Forsberg, J.; Olsson, A.; Nordgren, J.; Okada, Kozo; Kotani, A.

In: Physical Review Letters, Vol. 96, No. 6, 067402, 2006.

Research output: Contribution to journalArticle

Duda, L. C. ; Schmitt, T. ; Magnuson, M. ; Forsberg, J. ; Olsson, A. ; Nordgren, J. ; Okada, Kozo ; Kotani, A. / Resonant inelastic X-ray scattering at the oxygen K resonance of NiO : Nonlocal charge transfer and double-singlet excitations. In: Physical Review Letters. 2006 ; Vol. 96, No. 6.
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AU - Forsberg, J.

AU - Olsson, A.

AU - Nordgren, J.

AU - Okada, Kozo

AU - Kotani, A.

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AB - 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 Δ and the Hund coupling energy JH.

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