X-ray angle-resolved photoemission spectroscopy of CaB6

S. Souma; T. Takahashi; H. Komatsu; T. Sato; H. Matsui; N. Kimura; H. Aoki; S. Kunii; J. Akimitsu

doi:10.1103/PhysRevB.70.073104

X-ray angle-resolved photoemission spectroscopy of CaB₆

S. Souma, T. Takahashi, H. Komatsu, T. Sato, H. Matsui, N. Kimura, H. Aoki, S. Kunii, J. Akimitsu

Research output: Contribution to journal › Article › peer-review

5 Citations (Scopus)

Abstract

We have performed an x-ray angle-resolved photoemission spectroscopy (ARPES) on Ca_1-xLa_xB₆ (x=0.005) to study the band structure relevant to the anomalous high-temperature ferromagnetism. The obtained band structure shows a good agreement with the GW band calculation as well as the previous ARPES results with ultraviolet light. This indicates that CaB₆ is not an excitonic insulator, but is intrinsically a semiconductor with a 1-eV gap at the X point.

Original language	English
Article number	073104
Pages (from-to)	073104-1-073104-4
Journal	Physical Review B - Condensed Matter and Materials Physics
Volume	70
Issue number	7
DOIs	https://doi.org/10.1103/PhysRevB.70.073104
Publication status	Published - 2004 Aug

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10.1103/PhysRevB.70.073104

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title = "X-ray angle-resolved photoemission spectroscopy of CaB6",

abstract = "We have performed an x-ray angle-resolved photoemission spectroscopy (ARPES) on Ca1-xLaxB6 (x=0.005) to study the band structure relevant to the anomalous high-temperature ferromagnetism. The obtained band structure shows a good agreement with the GW band calculation as well as the previous ARPES results with ultraviolet light. This indicates that CaB6 is not an excitonic insulator, but is intrinsically a semiconductor with a 1-eV gap at the X point.",

author = "S. Souma and T. Takahashi and H. Komatsu and T. Sato and H. Matsui and N. Kimura and H. Aoki and S. Kunii and J. Akimitsu",

note = "Funding Information: We thank T. Muro at SPring-8 for his help in the experiment. S. S. thanks the JSPS for financial support. This work was supported by a grant from the MEXT of Japan.",

year = "2004",

month = aug,

doi = "10.1103/PhysRevB.70.073104",

language = "English",

volume = "70",

pages = "073104--1--073104--4",

journal = "Physical Review B - Condensed Matter and Materials Physics",

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publisher = "American Physical Society",

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T1 - X-ray angle-resolved photoemission spectroscopy of CaB6

AU - Souma, S.

AU - Takahashi, T.

AU - Komatsu, H.

AU - Sato, T.

AU - Matsui, H.

AU - Kimura, N.

AU - Aoki, H.

AU - Kunii, S.

AU - Akimitsu, J.

N1 - Funding Information: We thank T. Muro at SPring-8 for his help in the experiment. S. S. thanks the JSPS for financial support. This work was supported by a grant from the MEXT of Japan.

PY - 2004/8

Y1 - 2004/8

N2 - We have performed an x-ray angle-resolved photoemission spectroscopy (ARPES) on Ca1-xLaxB6 (x=0.005) to study the band structure relevant to the anomalous high-temperature ferromagnetism. The obtained band structure shows a good agreement with the GW band calculation as well as the previous ARPES results with ultraviolet light. This indicates that CaB6 is not an excitonic insulator, but is intrinsically a semiconductor with a 1-eV gap at the X point.

AB - We have performed an x-ray angle-resolved photoemission spectroscopy (ARPES) on Ca1-xLaxB6 (x=0.005) to study the band structure relevant to the anomalous high-temperature ferromagnetism. The obtained band structure shows a good agreement with the GW band calculation as well as the previous ARPES results with ultraviolet light. This indicates that CaB6 is not an excitonic insulator, but is intrinsically a semiconductor with a 1-eV gap at the X point.

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JF - Physical Review B - Condensed Matter and Materials Physics

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X-ray angle-resolved photoemission spectroscopy of CaB₆

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