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

International Conference on Strongly Correlated Electron Systems 2016

Sundermann, M.^1 ; Chen, K.^1 ; Utsumi, Y.^2,3 ; Wu, Y.-H.^4 ; Tsuei, K.-D.^4 ; Haenel, J.^5 ; Prokofiev, A.^5 ; Paschen, S.^5 ; Tanaka, A.^6 ; Tjeng, L.H.^2 ; Severing, A.^1

Institute of Physics II, University of Cologne, Zülpicher Straße 77, Köln

50937, Germany^1

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

01187, Germany^2

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

91192, France^3

National Synchrotron Radiation Reasearch Center, Hsinchu, Taiwan^4

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

Department of Quantum Matter, ADSM Hiroshima University, Japan^6

关键词: Bulk sensitive;    CeRu4Sn6;    Hard X-ray photoelectron spectroscopy;    Iteration model;    Kondo insulators;    Line-shape analysis;    Mixed valence compounds;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/807/2/022001/pdf
DOI  :  10.1088/1742-6596/807/2/022001

来源: IOP

【 摘 要 】

Bulk sensitive hard x-ray photoelectron spectroscopy data of the Ce 3p core level of CeRu4Sn6are 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 CeRu4Sn6is a moderately mixed valence compound with a weight of 8% for the Ce f0configuration in the ground state.