Charge-Transfer Excitations in One-Dimensional Dimerized Mott Insulators

• Maeshima Nobuya

  Department of Chemistry, Tohoku University Institute for Molecular Science

• Yonemitsu Kenji

  Institute for Molecular Science Department of Functional Molecular Science, Graduate University for Advanced Studies

抄録

We investigate the optical properties of one-dimensional (1D) dimerized Mott insulators using the 1D dimerized extended Hubbard model. Numerical calculations and a perturbative analysis from the decoupled-dimer limit clarify that there are three relevant classes of charge-transfer (CT) states generated by photoexcitation: interdimer CT unbound states, interdimer CT exciton states, and intradimer CT exciton states. This classification is applied to understanding the optical properties of an organic molecular material, 1,3,5-trithia-2,4,6-triazapentalenyl (TTTA), which is known for its photoinduced transition from the dimerized spin-singlet phase to the regular paramagnetic phase. We conclude that the lowest photoexcited state of TTTA is the interdimer CT exciton state and the second lowest state is the intradimer CT exciton state.

収録刊行物

• Ｊｏｕｒｎａｌ　ｏｆ　ｔｈｅ　Ｐｈｙｓｉｃａｌ　Ｓｏｃｉｅｔｙ　ｏｆ　Ｊａｐａｎ

  Ｊｏｕｒｎａｌ　ｏｆ　ｔｈｅ　Ｐｈｙｓｉｃａｌ　Ｓｏｃｉｅｔｙ　ｏｆ　Ｊａｐａｎ 76 (7), 074713-074713, 2007

  一般社団法人 日本物理学会

キーワード

• strongly correlated electron systems
• spin-Peierls transition
• photoinduced phase transition
• optical conductivity

詳細情報

• CRID: 1390001204193766656
• NII論文ID: 130005296997
• NII論文ID: 110006350777
• NII論文ID: 210000106799
• NII書誌ID: AA00704814
• DOI: 10.1143/jpsj.76.074713
• ISSN: 13474073
• ISSN: 00319015
• NDL書誌ID: 8815247
• Web Site: http://id.ndl.go.jp/bib/8815247
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I8815247
• Web Site: https://journals.jps.jp/doi/pdf/10.1143/JPSJ.76.074713
• 本文言語コード: en
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