Theoretical Study on Frenkel Excitons in Mott–Jahn–Teller Insulator <i>A</i>₄C₆₀

• Suzuki Shugo

  Institute of Materials Science, University of Tsukuba

• Hirosawa Jin

  Institute of Materials Science, University of Tsukuba

• Nakao Kenji

  Institute of Materials Science, University of Tsukuba

書誌事項

タイトル別名

• Theoretical Study on Frenkel Excitons in Mott–Jahn–Teller Insulator A4C60

抄録

We study low-energy excitations in the Mott–Jahn–Teller insulator A₄C₆₀ theoretically, where A is alkali metal. A model which takes account of both the electron–electron and electron–phonon interactions is employed and the low-energy excitations are calculated by using the Tamm–Dancoff approximation. It is found that the lowest excitation corresponds to the creation of the spin-singlet Frenkel excitons at about 0.3 eV and the next lowest excitation corresponds to the creation of the spin-triplet Frenkel excitons at about 0.6 eV. It is also found that the excitations of a pair of a free electron and a free hole lie over 0.8 eV. A remarkable point is that the spin-singlet Frenkel excitons are lower in energy than the spin-triplet Frenkel excitons in A₄C₆₀ in contrast to usual insulators.

収録刊行物

• Ｊｏｕｒｎａｌ　ｏｆ　ｔｈｅ　Ｐｈｙｓｉｃａｌ　Ｓｏｃｉｅｔｙ　ｏｆ　Ｊａｐａｎ

  Ｊｏｕｒｎａｌ　ｏｆ　ｔｈｅ　Ｐｈｙｓｉｃａｌ　Ｓｏｃｉｅｔｙ　ｏｆ　Ｊａｐａｎ 75 (8), 084709-, 2006

  一般社団法人 日本物理学会

キーワード

• alkali-metal-doped C<SUB>60</SUB>
• Mott–Jahn–Teller insulator
• electron–electron interaction
• electron correlation
• electron–phonon interaction
• Jahn–Teller effect

詳細情報

• CRID: 1390001204189432832
• NII論文ID: 110004799220
• NII論文ID: 120007131417
• NII書誌ID: AA00704814
• DOI: 10.1143/jpsj.75.084709
• BIBCODE: 2006JPSJ...75h4709S
• ISSN: 13474073
• ISSN: 00319015
• HANDLE: 2241/103964
• NDL書誌ID: 8020265
• Web Site: https://tsukuba.repo.nii.ac.jp/records/18391
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I8020265
• Web Site: https://journals.jps.jp/doi/pdf/10.1143/JPSJ.75.084709
• 本文言語コード: en
• データソース種別:
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  • IRDB
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  • Crossref
  • CiNii Articles
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