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Ce 3p hard x-ray photoelectron spectroscopy study of the topological Kondo insulator CeRu4Sn6

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, , Citation M Sundermann et al 2017 J. Phys.: Conf. Ser. 807 022001 DOI 10.1088/1742-6596/807/2/022001

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sundermann@ph2.uni-koeln.de

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1 Institute of Physics II, University of Cologne, Zülpicher Straße 77, 50937, Köln, Germany

2 Max Planck Institute for Chemical Physics of Solids, Nöthnitzerstraße 40, 01187 Dresden, Germany

3 Synchrotron SOLEIL, L'Orme des Merisiers, Saint-Aubin PB48, 91192 Gif-sur-Yvette, France

4 National Synchrotron Radiation Reasearch Center, Hsinchu, Taiwan

5 Institute of Solid State Physics, Vienna University of Technology, Austria

6 Department of Quantum Matter, ADSM Hiroshima University, Japan

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1742-6596/807/2/022001

Abstract

Bulk sensitive hard x-ray photoelectron spectroscopy data of the Ce 3p core level of CeRu4Sn6 are presented. Using a combination of full multiplet and configuration iteration model we were able to obtain an accurate lineshape analysis of the data, thereby taking into account correlations for the strong plasmon intensities. We conclude that CeRu4Sn6 is a moderately mixed valence compound with a weight of 8% for the Ce f0 configuration in the ground state.

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10.1088/1742-6596/807/2/022001