4f excitations in Ce Kondo lattices studied by resonant inelastic x-ray 
scattering

Amorese, A.; Dellea, G.; Fanciulli, M.; Seiro, S.; Geibel, C.; Krellner, C.; Makarova, I. P.; Braicovich, L.; Ghiringhelli, G.; Vyalikh, D. V.; Brookes, N. B.; Kummer, K.

doi:10.1103/PhysRevB.93.165134

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4f excitations in Ce Kondo lattices studied by resonant inelastic x-ray scattering

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Seiro, S.
Silvia Seiro, Physics of Quantum Materials, Max Planck Institute for Chemical Physics of Solids, Max Planck Society;

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Geibel, C.
Christoph Geibel, Physics of Quantum Materials, Max Planck Institute for Chemical Physics of Solids, Max Planck Society;

/persons/resource/persons126710

Krellner, C.
Max Planck Institute for Chemical Physics of Solids, Max Planck Society;

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引用

Amorese, A., Dellea, G., Fanciulli, M., Seiro, S., Geibel, C., Krellner, C., Makarova, I. P., Braicovich, L., Ghiringhelli, G., Vyalikh, D. V., Brookes, N. B., & Kummer, K. (2016). 4f excitations in Ce Kondo lattices studied by resonant inelastic x-ray scattering. Physical Review B, 93(16):, pp. 1-6. doi:10.1103/PhysRevB.93.165134.

引用: https://hdl.handle.net/11858/00-001M-0000-002A-C5DD-C

要旨

The potential of resonant inelastic soft x-ray scattering to measure 4f crystal electric-field excitation spectra in Ce Kondo lattices has been examined. Spectra have been obtained for several Ce systems and show a well-defined structure determined by crystal-field, spin-orbit, and charge-transfer excitations only. The spectral shapes of the excitation spectra can be well understood in the framework of atomic multiplet calculations. For CeCu2Si2 we found notable disagreement between the inelastic x-ray-scattering spectra and theoretical calculations when using the crystal-field scheme proposed from inelastic neutron scattering. Modified sets of crystal-field parameters yield better agreement. Our results also show that, with the very recent improvements of soft x-ray spectrometers in resolution to below 30 meV at the Ce M-4,M-5 edges, resonant inelastic x-ray scattering could be an ideal tool to determine the crystal-field scheme in Ce Kondo lattices and other rare-earth compounds.