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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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Item Permalink: http://hdl.handle.net/11858/00-001M-0000-0025-0A1D-9 Version Permalink: http://hdl.handle.net/11858/00-001M-0000-0025-0A1E-7
Genre: Journal Article

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 Creators:
Strigari, F.1, Author
Sundermann, M.1, Author
Muro, Y.1, Author
Yutani, K.1, Author
Takabatake, T.1, Author
Tsuei, K.-D.1, Author
Liao, Y. F.1, Author
Tanaka, A.1, Author
Thalmeier, P.2, Author              
Haverkort, M. W.3, Author              
Tjeng, L. H.4, Author              
Severing, A.1, Author
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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Free keywords: Heavy fermion
 Abstract: 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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 Dates: 2015-01-282015-02-23
 Publication Status: Published in print
 Pages: -
 Publishing info: -
 Table of Contents: -
 Rev. Method: -
 Identifiers: DOI: 10.1016/j.elspec.2015.01.004
 Degree: -

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Title: Journal of Electron Spectroscopy and Related Phenomena
Source Genre: Journal
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Publ. Info: Amsterdam : Elsevier B.V.
Pages: - Volume / Issue: 199 Sequence Number: - Start / End Page: 56 - 63 Identifier: ISSN: 0368-2048
CoNE: /journals/resource/954925524767