Quantitative study of the f occupation in CeMIn5 and other cerium compounds with hard x-rays

Abstract

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 wn of the different fn 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 Veff 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.

arXiv comment9 pages, 5 figures

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Cited by in corpus (17)

• Evolution of the Kondo lattice electronic structure above the transport coherence temperature
• Evolution of ground state wave function in CeCoIn${}_5$ upon Cd or Sn doping
• Spectroscopic evidence of Kondo-induced quasi-quartet in CeRh${}_2$As${}_2$
• Antiferromagnetic correlations in strongly valence fluctuating CeIrSn
• Orientation of ground-state orbital in CeCoIn${}_5$ and CeRhIn${}_5$
• Orbital selective coupling in CeRh${}_3$B${}_2$: co-existence of high Curie and high Kondo temperature
• Influence of anti-site disorder and electron-electron correlations on the electronic structure of CeMnNi${}_4$
• Localized-to-itinerant transition preceding antiferromagnetic quantum critical point and gapless superconductivity in CeRh${}_{0.5}$Ir${}_{0.5}$In${}_5$
• A microscopic Kondo lattice model for the heavy fermion antiferromagnet CeIn${}_3$
• Quantifying the U $5f$ covalence and degree of localization in U intermetallics
• Intermediate valence in single crystalline Yb${}_2$Si${}_2$Al
• Charge fluctuations in the intermediate-valence ground state of SmCoIn${}_5$
• Ce 3$p$ hard x-ray photoelectron spectroscopy study of the topological Kondo insulator CeRu${}_4$Sn${}_6$
• Quantitative investigation of the 4$f$ occupation in the quasikagome Kondo lattice CeRh${}_{1-x}$Pd${}_x$Sn
• Derivation of low-energy Hamiltonians for heavy-fermion Materials
• The Kondo effect in ferromagnetic quantum critical CeRh${}_6$Ge${}_4$
• Comment on: Quantitative study of the $f$ occupation in CeMIn5 and other cerium compounds with hard X-rays, [arXiv:1601.03270]