期刊
JOURNAL OF ELECTRON SPECTROSCOPY AND RELATED PHENOMENA
卷 209, 期 -, 页码 1-8出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.elspec.2016.02.002
关键词
Heavy fermion; Valence; Hard X-ray photoelectron spectroscopy; L-edge X-ray absorption; Full multiplet; Single impurity Anderson model
类别
资金
- DFG [600575]
- U.S. Department of Energy, Office of Basic Energy Sciences, Division of Materials Sciences and Engineering
- Grants-in-Aid for Scientific Research [26400322, 15K05180, 26400363] Funding Source: KAKEN
We present bulk-sensitive hard X-ray photoelectron spectroscopy (HAXPES) data of the Ce3d core levels and lifetime-reduced L-edge X-ray absorption spectroscopy (XAS) in the partial fluorescence yield (PFY) mode of the CeMIn5 family with M=Co, Rh, and Ir. The HAXPES data are analyzed quantitatively with a combination of full multiplet and configuration interaction model which allows correcting for the strong plasmons in the CeMIn5 HAXPES data, and reliable weights w(n) of the different f(n) contributions in the ground state are determined. The CeMIn5 results are compared to HAXPES data of other heavy fermion compounds and a systematic decrease of the hybridization strength V-eff from CePd3 to CeRh3B2 to CeRu2Si2 is observed, while it is smallest for the three CeMIn5 compounds. The f-occupation, however, increases in the same sequence and is close to one for the CeMIn5 family. The PFY-XAS data confirm an identical f-occupation in the three CeMIn5 compounds and a phenomenological fit to these PFY-XAS data combined with a configuration interaction model yields consistent results. (C) 2016 The Authors. Published by Elsevier B.V.
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