Evolution of lattice coherence in the intermediate-valence heavy-fermion compound EuNi2 P2 studied by point contact spectroscopy

Masanobu Shiga, Isao Maruyama, Kengo Okimura, Takurou Harada, Takuya Takahashi, Akihiro Mitsuda, Hirofumi Wada, Yuji Inagaki, Tatsuya Kawae

Research output: Contribution to journalArticlepeer-review

Abstract

We performed a point contact spectroscopy study in an intermediate-valence heavy-fermion (HF) compound EuNi2P2. Above the Kondo temperature TK, the differential conductance spectra show a broad peak due to the Kondo resonance at the Eu site. Below TK, the broad peak splits into two peaks that can be reproduced by the summation of two Fano curves with the same parameters, indicating the emergence of the indirect hybridization gap in an Anderson lattice. With decreasing temperature, the separation between the two peaks increases and saturates at very low temperatures. The results reveal the evolution of the electronic structure in the HF state due to the development of the lattice coherence.

Original languageEnglish
Article numberL041113
JournalPhysical Review B
Volume103
Issue number4
DOIs
Publication statusPublished - Jan 25 2021

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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