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Photon Energy dependent Hard X Ray Photoemission Spectroscopy of YbCu2Si2

Journal article published in 2012 by Satoshi Kitayama, F. Schäfers, Hidenori Fujiwara, Mihaela Gorgoi, Andrei Gloskovsky, Franz Schaefers, Claudia Felser, Gen Funabashi, Junich Yamaguchi, Masato Kimura, Go Kuwahara, Shin Imada, Atsushi Higashiya, Kenji Tamasaku, Makina Yabashi ORCID and other authors.
This paper was not found in any repository; the policy of its publisher is unknown or unclear.
This paper was not found in any repository; the policy of its publisher is unknown or unclear.

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Abstract

We have performed photon energy h amp; 957; dependent hard X ray photoemission spectroscopy HAX PES for YbCu2Si2, which is a heavy Fermion compound with intermediate Yb valence. We iden tified that the bulk components in the Si 1s and Yb 3d spectra develop with increasing h amp; 957; from 2.5 keV to 6 keV. Moreover, the temperature dependence of the Yb 3 d spectra measured at h amp; 957; 8 keV has shown a valence fluctuation behavior. These results suggest that high h amp; 957; HAXPES is essential to determine the mean valence of the Yb compounds