Temperature dependence of the Kondo resonance peak in photoemission spectra of YbCdCu4.

Autor: Hiroto Shiono, Suzuna Ishihara, Kojiro Mimura, Hitoshi Sato, Schwier, Eike F., Kenya Shimada, Masaki Taniguchi, Shin-ichiro Ideta, Kiyohisa Tanaka, Tao Zhuang, Matsumoto, Keisuke T., Koichi Hiraoka, Hiroaki Anzai
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Zdroj: AIP Conference Proceedings; 2018, Vol. 2054 Issue 1, p040013-1-040013-4, 4p
Abstrakt: We studied the electronic structure of YbCdCu4, which is known as a heavy fermion compound, by means of photoemission spectroscopy. An energy shift and an intensity enhancement of the Yb2+ 4 f7/2 peak are clearly observed with decreasing temperature. The characteristic energy scale of the Kondo temperature is estimated as ~ 26.5 meV, which is in agreement with the Kondo temperature obtained by the magnetic susceptibility measurements. It suggests that the observed 4 f7/2 state is associated with the heavy fermion behavior of YbCdCu4. [ABSTRACT FROM AUTHOR]
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