Gap Formation in the Filled Skutterudite CeOs₄Sb₁₂

• Matsunami Masaharu

  Graduate School of Science and Technology, Kobe University

• Okamura Hidekazu

  Graduate School of Science and Technology, Kobe University

• Nanba Takao

  Graduate School of Science and Technology, Kobe University

• Sugawara Hitoshi

  Department of Physics, Tokyo Metropolitan University

• Sato Hideyuki

  Department of Physics, Tokyo Metropolitan University

書誌事項

タイトル別名

• Gap Formation in the Filled Skutterudite CeOs4Sb12

抄録

We have studied the optical conductivity of the filled skutterudite CeOs₄Sb₁₂. The optical conductivity spectra show a strong temperature dependence and reveal an energy gap of ∼30 meV below 60 K. This shows that the density of states near the Fermi level of CeOs₄Sb₁₂ is strongly reduced. In addition to the gap formation, a pronounced peak is observed at ∼70 meV below 160 K. This mid-infrared peak is interpreted in terms of optical excitations across a hybridization gap consisting of conduction- and f-electron states. The observed characteristics in the optical spectra are quite similar to those previously reported for Kondo semiconductors. We compare the optical characteristics of CeOs₄Sb₁₂ found in the present work with other physical properties, and analyze its electronic structures.

収録刊行物

• Ｊｏｕｒｎａｌ　ｏｆ　ｔｈｅ　Ｐｈｙｓｉｃａｌ　Ｓｏｃｉｅｔｙ　ｏｆ　Ｊａｐａｎ

  Ｊｏｕｒｎａｌ　ｏｆ　ｔｈｅ　Ｐｈｙｓｉｃａｌ　Ｓｏｃｉｅｔｙ　ｏｆ　Ｊａｐａｎ 72 (11), 2722-2725, 2003

  一般社団法人 日本物理学会

キーワード

• CeOs<SUB>4</SUB>Sb<SUB>12</SUB>
• filled skutterudite
• optical conductivity
• heavy fermion
• Kondo semiconductor

詳細情報

• CRID: 1390282679164645504
• NII論文ID: 210000104524
• NII論文ID: 110001954295
• NII書誌ID: AA00704814
• DOI: 10.1143/jpsj.72.2722
• BIBCODE: 2003JPSJ...72.2722M
• ISSN: 13474073
• ISSN: 00319015
• NDL書誌ID: 6744954
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I6744954
• Web Site: http://journals.jps.jp/doi/pdf/10.1143/JPSJ.72.2722
• 本文言語コード: en
• データソース種別:
  • JaLC
  • NDL
  • Crossref
  • CiNii Articles
• 抄録ライセンスフラグ: 使用不可