TY - JOUR
T1 - Observation of Kondo Resonance and Low-Energy Excitation in CeB6 Using Point-Contact Spectroscopy
AU - Shiga, Masanobu
AU - Takahashi, Takuya
AU - Teramoto, Tsubasa
AU - Iga, Fumitoshi
AU - Kawae, Tatsuya
N1 - Funding Information:
Acknowledgments We thank K. Ienaga for the fruitful discussions. We also thank T. Hasuo and K. Yamaguchi for their technical support in constructing the 3He cryostat. This work was partially supported by JSPS KAKENHI (Grant No. 21H01605), the Nippon Sheet Glass Foundation for Materials Science and Engineering, and the Murata Science Foundation.
Publisher Copyright:
© 2022 The Physical Society of Japan.
PY - 2022/11/15
Y1 - 2022/11/15
N2 - We performed point-contact spectroscopy on CeB6, a heavy fermion compound, using superconducting Nb as a probe tip to achieve high-precision measurements. The differential conductance spectrum represents a sharp zero-bias conductance peak (ZBCP) below T ∼ 6 K. The temperature dependence of the spectra reveals that the ZBCP intensity increases logarithmically with decreasing temperature, owing to the evolution of Kondo resonance. A double-peak structure reflecting the indirect hybridization gap was not observed, suggesting that the development of Kondo lattice coherence is prevented by the emergence of antiferroquadrupolar and=or antiferromagnetic orderings.
AB - We performed point-contact spectroscopy on CeB6, a heavy fermion compound, using superconducting Nb as a probe tip to achieve high-precision measurements. The differential conductance spectrum represents a sharp zero-bias conductance peak (ZBCP) below T ∼ 6 K. The temperature dependence of the spectra reveals that the ZBCP intensity increases logarithmically with decreasing temperature, owing to the evolution of Kondo resonance. A double-peak structure reflecting the indirect hybridization gap was not observed, suggesting that the development of Kondo lattice coherence is prevented by the emergence of antiferroquadrupolar and=or antiferromagnetic orderings.
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U2 - 10.7566/JPSJ.91.113705
DO - 10.7566/JPSJ.91.113705
M3 - Article
AN - SCOPUS:85145453824
SN - 0031-9015
VL - 91
JO - journal of the physical society of japan
JF - journal of the physical society of japan
IS - 11
M1 - 113705
ER -