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  Quantitative study of valence and configuration interaction parameters of the Kondo semiconductors CeM2Al10 (M=Ru, Os and Fe) by means of bulk-sensitive hard X-ray photoelectron spectroscopy

Strigari, F., Sundermann, M., Muro, Y., Yutani, K., Takabatake, T., Tsuei, K.-D., et al. (2015). Quantitative study of valence and configuration interaction parameters of the Kondo semiconductors CeM2Al10 (M=Ru, Os and Fe) by means of bulk-sensitive hard X-ray photoelectron spectroscopy. Journal of Electron Spectroscopy and Related Phenomena, 199, 56-63. doi:10.1016/j.elspec.2015.01.004.

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Strigari, F.1, Autor
Sundermann, M.1, Autor
Muro, Y.1, Autor
Yutani, K.1, Autor
Takabatake, T.1, Autor
Tsuei, K.-D.1, Autor
Liao, Y. F.1, Autor
Tanaka, A.1, Autor
Thalmeier, P.2, Autor           
Haverkort, M. W.3, Autor           
Tjeng, L. H.4, Autor           
Severing, A.1, Autor
Affiliations:
1External Organizations, ou_persistent22              
2Peter Thalmeier, Physics of Correlated Matter, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863457              
3Maurits Haverkort, Physics of Correlated Matter, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863455              
4Liu Hao Tjeng, Physics of Correlated Matter, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863452              

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Schlagwörter: Heavy fermion
 Zusammenfassung: Abstract The occupancy of the 4fn contributions in the Kondo semiconductors CeM2Al10 (Mxa0;=xa0;Ru, Os and Fe) has been quantitatively determined by means of bulk-sensitive hard X-ray photoelectron spectroscopy (HAXPES) on the Ce 3d core levels. Combining a configuration interaction scheme with full multiplet calculations allowed to accurately describe the \HAXPES\ data despite the presence of strong plasmon excitations in the spectra. The configuration interaction parameters obtained from this analysis – in particular the hybridization strength Veff and the effective f binding energy Δf – indicate a slightly stronger exchange interaction in CeOs2Al10 compared to CeRu2Al10, and a significant increase in CeFe2Al10. This shows the existence of a substantial amount of Kondo screening in these magnetically ordered systems and places the entire CeM2Al10 family in the region of strong exchange interactions.

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 Datum: 2015-01-282015-02-23
 Publikationsstatus: Erschienen
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 Art der Begutachtung: -
 Identifikatoren: DOI: 10.1016/j.elspec.2015.01.004
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Titel: Journal of Electron Spectroscopy and Related Phenomena
Genre der Quelle: Zeitschrift
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Ort, Verlag, Ausgabe: Amsterdam : Elsevier B.V.
Seiten: - Band / Heft: 199 Artikelnummer: - Start- / Endseite: 56 - 63 Identifikator: ISSN: 0368-2048
CoNE: https://pure.mpg.de/cone/journals/resource/954925524767