Observation of Kondo Resonance and Low-Energy Excitation in CeB<sub>6</sub> Using Point-Contact Spectroscopy

Shiga, Masanobu; Takahashi, Tōru; Teramoto, Tsubasa; Iga, Fumitoshi; Kawae, Tatsuya

doi:10.7566/jpsj.91.113705

J. Phys. Soc. Jpn.

2022

DOI: 10.7566/jpsj.91.113705

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Observation of Kondo Resonance and Low-Energy Excitation in CeB₆ Using Point-Contact Spectroscopy

Masanobu Shiga

Tōru Takahashi

Tsubasa Teramoto

et al.

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Cited by 2 publications

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Kondo breakdown in the topological Kondo insulator SmB6 studied by point-contact Andreev reflection spectroscopy

Shiga,

Teramoto,

Harada

et al. 2023

Phys. Rev. B

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We studied the topological features in Kondo insulator SmB 6 by point-contact Andreev reflection spectroscopy with a Nb probe tip. Below the superconducting transition of Nb, the spectra exhibited a narrow dip at around zero bias superposed on a broad asymmetric background caused by the Kondo resonance. The contact-size dependence of the spectra revealed that the width of the resonance is suppressed near the surface. The spin polarization in the surface state was ∼0.56, which is smaller than that in Bi-based topological insulators. These indicate that the Kondo breakdown plays a crucial role for the topological features, not only in the bulk state near the surface but also in the surface state on SmB 6 .

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Kondo breakdown in the topological Kondo insulator SmB6 studied by point-contact Andreev reflection spectroscopy

Shiga,

Teramoto,

Harada

et al. 2023

Phys. Rev. B

View full text Add to dashboard Cite

show abstract

Kondo Resonance in Heavy Fermion System CeRu₂Si₂ Studied by Point-Contact Spectroscopy

Takahashi,

Shiga,

Teramoto

et al. 2024

J. Phys. Soc. Jpn.

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Observation of Kondo Resonance and Low-Energy Excitation in CeB₆ Using Point-Contact Spectroscopy

Cited by 2 publications

References 39 publications

Kondo breakdown in the topological Kondo insulator SmB6 studied by point-contact Andreev reflection spectroscopy

Kondo breakdown in the topological Kondo insulator SmB6 studied by point-contact Andreev reflection spectroscopy

Kondo Resonance in Heavy Fermion System CeRu₂Si₂ Studied by Point-Contact Spectroscopy

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Observation of Kondo Resonance and Low-Energy Excitation in CeB6 Using Point-Contact Spectroscopy

Cited by 2 publications

References 39 publications

Kondo breakdown in the topological Kondo insulator SmB6 studied by point-contact Andreev reflection spectroscopy

Kondo breakdown in the topological Kondo insulator SmB6 studied by point-contact Andreev reflection spectroscopy

Kondo Resonance in Heavy Fermion System CeRu2Si2 Studied by Point-Contact Spectroscopy

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Observation of Kondo Resonance and Low-Energy Excitation in CeB₆ Using Point-Contact Spectroscopy

Kondo Resonance in Heavy Fermion System CeRu₂Si₂ Studied by Point-Contact Spectroscopy