Abstract

We have investigated the electronic structure of YbZn1-xSnxCu4 with x &equal; 0.5 by means of hard x-ray photoemission spectroscopy (HAXPES) with hv &equal; 5.95 keV and low photon energy photoemission spectroscopy (LEPES) with hv &equal; 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.

Details

Title
Photoemission study on YbZn1-xSnxCu4
Author
Sato, Hitoshi 1 ; Utsumi, Yuki 2 ; Kodama, Junichi 3 ; Arita, Masashi 1 ; Anzai, Hiroaki 4 ; Mimura, Kojiro 4 ; Shimada, Kenya 1 ; Ueda, Shigenori 5 ; Tsujii, Naohito 6 ; Namatame, Hirofumi 1 ; Taniguchi, Masaki 7 

 Hiroshima Synchrotron Radiation Center, Hiroshima University, Kagamiyama 2-313, Higashi-Hiroshima 739-0046, Japan 
 Max Planck Institute for Chemical Physics of Solids, Dresden 01187, Germany 
 Graduate School of Science, Hiroshima University, Kagamiyama 1-3-1, Higashi-Hiroshima 739-8526, Japan 
 Graduate School of Engineering, Osaka Prefecture University, Sakai 599-8531, Japan 
 Synchrotron X-ray Station at SPring-8, National Institute for Materials Science, Hyogo 679-5148, Japan; Quantum Beam Unit, National Institute for Materials Science, Tsukuba 305-0047, Japan 
 Quantum Beam Unit, National Institute for Materials Science, Tsukuba 305-0047, Japan 
 Hiroshima Synchrotron Radiation Center, Hiroshima University, Kagamiyama 2-313, Higashi-Hiroshima 739-0046, Japan; Graduate School of Science, Hiroshima University, Kagamiyama 1-3-1, Higashi-Hiroshima 739-8526, Japan 
Publication year
2015
Publication date
Mar 2015
Publisher
IOP Publishing
ISSN
17426588
e-ISSN
17426596
Source type
Scholarly Journal
Language of publication
English
ProQuest document ID
2576278378
Copyright
© 2015. This work is published under http://creativecommons.org/licenses/by/3.0/ (the “License”). Notwithstanding the ProQuest Terms and Conditions, you may use this content in accordance with the terms of the License.