Observation of Kondo resonance in valence-ordered YbPd

Masanobu Shiga, Kengo Okimura, Hiroki Takata, Akihiro Mitsuda, Isao Maruyama, Hirofumi Wada, Yuji Inagaki, Tatsuya Kawae

研究成果: ジャーナルへの寄稿学術誌査読

7 被引用数 (Scopus)


We performed a point-contact spectroscopy study of intermediate valence compound YbPd, in which two Yb sites are ordered with the valence values of 3+ and 2.6+. Differential conductance spectra exhibit a dip structure at around zero bias with an asymmetric background, which can be reproduced by the summation of two Kondo resonances. Fitting with the Fano equation, the Kondo temperature of the 3+ site is estimated to be ∼30K, while that of the 2.6+ site is ∼800K. Additionally, the dip amplitude exhibits-lnT dependence below ∼25K and saturates at ∼1K. These results provide direct evidence for the screening of magnetic moments at the valence ordering sites owing to the Kondo effect.

ジャーナルPhysical Review B
出版ステータス出版済み - 12月 10 2019

!!!All Science Journal Classification (ASJC) codes

  • 電子材料、光学材料、および磁性材料
  • 凝縮系物理学


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