Low-energy electronic structure of the kondo insulator YbB12

T. Susaki; A. Sekiyama; K. Kobayashi; T. Mizokawa; A. Fujimori; M. Tsunekawa; T. Muro; T. Matsushita; S. Suga; H. Ishii; T. Hanyu; A. Kimura; H. Namatame; M. Taniguchi; T. Miyahara; F. Iga; M. Kasaya; H. Harima

doi:10.1103/PhysRevLett.77.4269

Low-energy electronic structure of the kondo insulator YbB₁₂

T. Susaki, A. Sekiyama, K. Kobayashi, T. Mizokawa, A. Fujimori, M. Tsunekawa, T. Muro, T. Matsushita, S. Suga, H. Ishii, T. Hanyu, A. Kimura, H. Namatame, M. Taniguchi, T. Miyahara, F. Iga, M. Kasaya, H. Harima

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Abstract

We have studied the low-energy electronic structure of a Kondo insulator YbB₁₂ by high-resolution photoemission spectroscopy. A “Kondo peak” is observed 25 meV below the Fermi level, which agrees well with the Kondo temperature, whereas the gap at the Fermi level is found much smaller, indicating that the magnetic properties at higher temperatures (≳75 K) are indeed determined by the Kondo effect in spite of the gap formation at lower temperatures. A renormalized band picture is presented to describe the coexistence of the Kondo peak and the transport gap as well as the highly asymmetric line shape of the Kondo peak.

Original language	English
Pages (from-to)	4269-4272
Number of pages	4
Journal	Physical Review Letters
Volume	77
Issue number	20
DOIs	https://doi.org/10.1103/PhysRevLett.77.4269
Publication status	Published - 1996
Externally published	Yes

ASJC Scopus subject areas

Physics and Astronomy(all)

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Susaki, T., Sekiyama, A., Kobayashi, K., Mizokawa, T., Fujimori, A., Tsunekawa, M., Muro, T., Matsushita, T., Suga, S., Ishii, H., Hanyu, T., Kimura, A., Namatame, H., Taniguchi, M., Miyahara, T., Iga, F., Kasaya, M., & Harima, H. (1996). Low-energy electronic structure of the kondo insulator YbB₁₂. Physical Review Letters, 77(20), 4269-4272. https://doi.org/10.1103/PhysRevLett.77.4269

Susaki, T, Sekiyama, A, Kobayashi, K, Mizokawa, T, Fujimori, A, Tsunekawa, M, Muro, T, Matsushita, T, Suga, S, Ishii, H, Hanyu, T, Kimura, A, Namatame, H, Taniguchi, M, Miyahara, T, Iga, F, Kasaya, M & Harima, H 1996, 'Low-energy electronic structure of the kondo insulator YbB₁₂', Physical Review Letters, vol. 77, no. 20, pp. 4269-4272. https://doi.org/10.1103/PhysRevLett.77.4269

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title = "Low-energy electronic structure of the kondo insulator YbB12",

abstract = "We have studied the low-energy electronic structure of a Kondo insulator YbB12 by high-resolution photoemission spectroscopy. A “Kondo peak” is observed 25 meV below the Fermi level, which agrees well with the Kondo temperature, whereas the gap at the Fermi level is found much smaller, indicating that the magnetic properties at higher temperatures (≳75 K) are indeed determined by the Kondo effect in spite of the gap formation at lower temperatures. A renormalized band picture is presented to describe the coexistence of the Kondo peak and the transport gap as well as the highly asymmetric line shape of the Kondo peak.",

author = "T. Susaki and A. Sekiyama and K. Kobayashi and T. Mizokawa and A. Fujimori and M. Tsunekawa and T. Muro and T. Matsushita and S. Suga and H. Ishii and T. Hanyu and A. Kimura and H. Namatame and M. Taniguchi and T. Miyahara and F. Iga and M. Kasaya and H. Harima",

year = "1996",

doi = "10.1103/PhysRevLett.77.4269",

language = "English",

volume = "77",

pages = "4269--4272",

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T1 - Low-energy electronic structure of the kondo insulator YbB12

AU - Susaki, T.

AU - Sekiyama, A.

AU - Kobayashi, K.

AU - Mizokawa, T.

AU - Fujimori, A.

AU - Tsunekawa, M.

AU - Muro, T.

AU - Matsushita, T.

AU - Suga, S.

AU - Ishii, H.

AU - Hanyu, T.

AU - Kimura, A.

AU - Namatame, H.

AU - Taniguchi, M.

AU - Miyahara, T.

AU - Iga, F.

AU - Kasaya, M.

AU - Harima, H.

PY - 1996

Y1 - 1996

N2 - We have studied the low-energy electronic structure of a Kondo insulator YbB12 by high-resolution photoemission spectroscopy. A “Kondo peak” is observed 25 meV below the Fermi level, which agrees well with the Kondo temperature, whereas the gap at the Fermi level is found much smaller, indicating that the magnetic properties at higher temperatures (≳75 K) are indeed determined by the Kondo effect in spite of the gap formation at lower temperatures. A renormalized band picture is presented to describe the coexistence of the Kondo peak and the transport gap as well as the highly asymmetric line shape of the Kondo peak.

AB - We have studied the low-energy electronic structure of a Kondo insulator YbB12 by high-resolution photoemission spectroscopy. A “Kondo peak” is observed 25 meV below the Fermi level, which agrees well with the Kondo temperature, whereas the gap at the Fermi level is found much smaller, indicating that the magnetic properties at higher temperatures (≳75 K) are indeed determined by the Kondo effect in spite of the gap formation at lower temperatures. A renormalized band picture is presented to describe the coexistence of the Kondo peak and the transport gap as well as the highly asymmetric line shape of the Kondo peak.

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Low-energy electronic structure of the kondo insulator YbB₁₂

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