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IOP Publishing, Journal of Physics: Conference Series, (592), p. 012016, 2015

DOI: 10.1088/1742-6596/592/1/012016

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Photoemission study on YbZn<sub>1-x</sub>Sn<sub>x</sub>Cu<sub>4</sub>

Journal article published in 2015 by Hitoshi Sato, Yuki Utsumi, Junichi Kodama, Masashi Arita, Hiroaki Anzai, Kojiro Mimura ORCID, Kenya Shimada, Shigenori Ueda, Naohito Tsujii, Hirofumi Namatame, Masaki Taniguchi
This paper is made freely available by the publisher.
This paper is made freely available by the publisher.

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Abstract

We have investigated the electronic structure of YbZn1-xSnxCu4 with 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.