Temperature-Dependent High-Resolution Photoemission Study of the Kondo Insulator YbB12

Physical Review Letters 82 巻 5 号 992-995 頁 1999-02-01 発行
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タイトル ( eng )
Temperature-Dependent High-Resolution Photoemission Study of the Kondo Insulator YbB12
作成者
Susaki Tomofumi
Takeda Yukiharu
Arita Masashi
Mamiya Kazutoshi
Fujimori Atsushi
Shimizu Naoki
Iga Fumitoshi
収録物名
Physical Review Letters
82
5
開始ページ 992
終了ページ 995
抄録
We have performed a detailed temperature-dependent photoemission study of the conduction-band states in the Kondo insulator YbB12 using single crystalline samples. Measurements with improved energy resolution have revealed (pseudo)gaps of two energy scales. The size of the narrower gap ~10 meV and its disappearance at high temperatures are consistent with the temperature dependence of the electrical resistivity and the magnetic susceptibility. The larger pseudogap of ~100 meV depends on temperature even at room temperature. We discuss how the characteristics of the Kondo insulator are reflected in the conduction-band photoemission spectra.
言語
英語
資源タイプ 学術雑誌論文
出版者
American Physical Society
発行日 1999-02-01
権利情報
Copyright (c) 1999 American Physical Society.
出版タイプ Version of Record(出版社版。早期公開を含む)
アクセス権 オープンアクセス
収録物識別子
[ISSN] 0031-9007
[DOI] 10.1103/PhysRevLett.82.992
[NCID] AA00773679
[DOI] http://dx.doi.org/10.1103/PhysRevLett.82.992