Photoemission study on YbZn1-xSnxCu4

International Conference on Strongly Correlated Electron Systems 2014

Sato, Hitoshi^1 ; Utsumi, Yuki^2 ; Kodama, Junichi^3 ; Arita, Masashi^1 ; Anzai, Hiroaki^4 ; Mimura, Kojiro^4 ; Shimada, Kenya^1 ; Ueda, Shigenori^5,6 ; Tsujii, Naohito^6 ; Namatame, Hirofumi^1 ; Taniguchi, Masaki^1,3

Hiroshima Synchrotron Radiation Center, Hiroshima University, Kagamiyama 2-313, Higashi-Hiroshima

739-0046, Japan^1

Max Planck Institute for Chemical Physics of Solids, Dresden

01187, Germany^2

Graduate School of Science, Hiroshima University, Kagamiyama 1-3-1, Higashi-Hiroshima

739-8526, Japan^3

Graduate School of Engineering, Osaka Prefecture University, Sakai

599-8531, Japan^4

Synchrotron X-ray Station at SPring-8, National Institute for Materials Science, Hyogo

679-5148, Japan^5

Quantum Beam Unit, National Institute for Materials Science, Tsukuba

305-0047, Japan^6

关键词: Energy position;    Hard X-ray photoemission spectroscopy;    Hax-pes;    Kondo resonances;    Kondo temperatures;    Photon energy;    Zero temperatures;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/592/1/012016/pdf
DOI  :  10.1088/1742-6596/592/1/012016

来源: IOP

【 摘 要 】

We have investigated the electronic structure of YbZn1-xSnxCu4with x 0.5 by means of hard x-ray photoemission spectroscopy (HAXPES) with hv 5.95 keV and low photon energy photoemission spectroscopy (LEPES) with hv 14 eV. The Yb valence derived from the Yb 3d HAXPES spectrum remarkably decreases between 100 and 20 K; ∼ 2.90 at 300-100 K and 2.78 at 20 K. The LEPES spectra exhibit a prominent peak near the Fermi level which is attributed to the Kondo resonance peak. The Kondo temperature is estimated to be TK∼ 210 K from an energy position of the peak extrapolated to zero temperature.