Soft x-ray angle-resolved and resonance photoemission study of CeCu2Ge2 and LaCu2Ge2

International Conference on Strongly Correlated Electron Systems 2014

Kimura, M.Y.^1 ; Fukushima, K.^1 ; Takeuchi, H.^1 ; Ikeda, S.^1 ; Sugiyama, H.^1 ; Tomida, Y.^1 ; Kuwahara, G.^1 ; Fujiwara, H.^1 ; Kiss, T.^1 ; Yasui, A.^2,3 ; Kawasaki, I.^2,4 ; Yamagami, H.^2,5 ; Saitoh, Y.^2 ; Muro, T.^6 ; Ebihara, T.^7 ; Sekiyama, A.^1

Division of Materials Physics, Graduate School of Engineering Science, Osaka University, Osaka, Toyonaka

560-8531, Japan^1

Condensed Matter Science Division, Japan Atomic Energy Agency (JAEA), Sayo, Hyogo

679-5148, Japan^2

Japan Synchrotron Radiation Research Institute (JASRI), Sayo, Hyoto

679-5198, Japan^3

Graduate School of Material Science, University of Hyogo, Kamigori-cho, Hyogo

678-1297, Japan^4

Department of Physics, Kyoto Sangyo University, Kyoto

603-8047, Japan^5

Japan Synchrotron Radiation Research Institute (JASRI), Sayo, Hyogo

679-5198, Japan^6

Department of Physics, Shizuoka University, Shizuoka

422-8529, Japan^7

关键词: Ambient pressures;    Angle resolved photoemission spectroscopy;    Angle-resolved;    Bulk sensitive;    Isostructural;    Resonance condition;    Resonance enhancement;    Resonance photoemission;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/592/1/012003/pdf
DOI  :  10.1088/1742-6596/592/1/012003

来源: IOP

【 摘 要 】

We have performed bulk-sensitive soft x-ray angle-resolved photoemission spectroscopy for CeCu2Ge2isostructural to a heavy fermion superconductor CeCu2Si2, indicating the localized 4f character in ambient pressure. Resonance enhancement is seen at the La 3d5/2-edge for LaCu2Ge2in both angle-resolved and integrated photoemission although the magnitude of enhancement is less than that in the Ce 3d5/2-edge resonance photoemission for CeCu2Ge2, which indicates that the rare-earth 5d contributions can also be enhanced in addition to the 4f contributions at the resonance conditions.