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Title: Quantitative study of the f occupation in CeMIn 5 and other cerium compounds with hard X-rays

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 CeMIn 5 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 CeMIn 5 HAXPES data, and reliable weights w n of the different f n contributions in the ground state are determined. The CeMIn 5 results are compared to HAXPES data of other heavy fermion compounds and a systematic decrease of the hybridization strength V eff from CePd 3 to CeRh 3B 2 to CeRu 2Si 2 is observed, while it is smallest for the three CeMIn 5 compounds. The f-occupation, however, increases in the same sequence and is close to one for the CeMIn 5 family. The PFY-XAS data confirm an identical f-occupation in the three CeMIn 5 compounds and a phenomenological fit to these PFY-XAS data combined with a configuration interaction model yields consistent results.
Authors:
 [1] ;  [1] ;  [1] ;  [2] ;  [3] ;  [3] ;  [3] ;  [3] ;  [4] ;  [5] ;  [6] ;  [7] ;  [7] ;  [7] ;  [8] ;  [9] ;  [10] ;  [11] ;  [10] ;  [2] more »;  [2] ;  [1] « less
  1. Univ. of Cologne (Germany). Inst. of Physics II
  2. Max Planck Inst. for Chemical Physics of Solids, Dresden (Germany)
  3. National Synchrotron Radiation Research Center, Hsinchu (Taiwan)
  4. RIKEN SPring-8 Center, Sayo (Japan)
  5. Kwansei Gakuin Univ., Sanda (Japan). Graduate School of Science and Technology; Japan Atomic Energy Agency (JAEA), Sayo (Japan). SPring-8
  6. Kwansei Gakuin Univ., Sanda (Japan). Graduate School of Science and Technology
  7. Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
  8. National Centre for Scientific Research (CNRS), Grenoble (France). Inst. NEEL
  9. Toyama Prefectural Univ., Imizu (Japan). Faculty of Engineering
  10. Hiroshima Univ., Higashi-Hiroshima (Japan). Dept. of Quantum Matter
  11. Hiroshima Univ., Higashi-Hiroshima (Japan). Dept. of Quantum Matter. Inst. for Advanced Materials Research
Publication Date:
OSTI Identifier:
1306682
Report Number(s):
LA-UR-17-24464
Journal ID: ISSN 0368-2048
Grant/Contract Number:
AC52-06NA25396; 600575
Type:
Published Article
Journal Name:
Journal of Electron Spectroscopy and Related Phenomena
Additional Journal Information:
Journal Volume: 209; Journal ID: ISSN 0368-2048
Publisher:
Elsevier
Research Org:
Univ. of Cologne (Germany); Los Alamos National Lab. (LANL), Los Alamos, NM (United States); National Synchrotron Radiation Research Center, Hsinchu (Taiwan)
Sponsoring Org:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22); German Research Foundation (DFG)
Country of Publication:
United States
Language:
English
Subject:
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY; heavy fermion; valence; hard x-ray photoelectron spectroscopy; L-edge x-ray absorption; full multiplet; single impurity Anderson model