Nonresonant inelastic x-ray scattering involving excitonic excitations: the examples of NiO and CoO
In a recent publication Larson et al. reported remarkably clear d−d excitations for NiO and CoO with x-ray scattering. Here we present an accurate quantitative description based on a local many body approach, beyond local density approximation + Hubbard U approximations. The magnitude of →q determin...
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| Format: | Article (Journal) |
| Language: | English |
| Published: |
21 December 2007
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| In: |
Physical review letters
Year: 2007, Volume: 99, Issue: 25, Pages: 257401 |
| ISSN: | 1079-7114 |
| DOI: | 10.1103/PhysRevLett.99.257401 |
| Online Access: | Verlag, Volltext: http://dx.doi.org/10.1103/PhysRevLett.99.257401 Verlag, Volltext: https://link.aps.org/doi/10.1103/PhysRevLett.99.257401 
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| Author Notes: | M.W. Haverkort, A. Tanaka, L.H. Tjeng, and G.A. Sawatzky |
| Summary: | In a recent publication Larson et al. reported remarkably clear d−d excitations for NiO and CoO with x-ray scattering. Here we present an accurate quantitative description based on a local many body approach, beyond local density approximation + Hubbard U approximations. The magnitude of →q determines which of the allowed multipoles contributes most to the spectra. The direction of →q with respect to the crystal can be used as an equivalent to polarization similar to electron energy loss spectroscopy, allowing for a determination of the local symmetry of the initial and final states. This method is more generally applicable and could be a powerful tool for the study of local distortions and symmetries in transition metal and rare earth compounds. |
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| Item Description: | Gesehen am 08.11.2017 |
| Physical Description: | Online Resource |
| ISSN: | 1079-7114 |
| DOI: | 10.1103/PhysRevLett.99.257401 |