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Photoinduced insulator-to-metal transition dynamics in models for quasi-two-dimensional organic conductors

Authors

  • Kenji Yonemitsu,

    Corresponding author
    1. Institute for Molecular Science, Okazaki 444-8585, Japan
    2. Department of Functional Molecular Science, Graduate University for Advanced Studies, Okazaki 444-8585, Japan
    3. JST, CREST, Tokyo 102-0075, Japan
    • Phone: +81 564 55 7312, Fax: +81 564 53 4660
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  • Yasuhiro Tanaka,

    1. Institute for Molecular Science, Okazaki 444-8585, Japan
    2. Department of Functional Molecular Science, Graduate University for Advanced Studies, Okazaki 444-8585, Japan
    3. JST, CREST, Tokyo 102-0075, Japan
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  • Satoshi Miyashita,

    1. Institute for Molecular Science, Okazaki 444-8585, Japan
    2. Institute for Materials Research, Tohoku University, Sendai 980-8577, Japan
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  • Nobuya Maeshima

    1. Institute of Materials Science, University of Tsukuba, Tsukuba 305-8573, Japan
    2. Center for Computational Sciences, University of Tsukuba, Tsukuba 305-8577, Japan
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Abstract

Photoinduced transition dynamics is studied in extended Peierls-Hubbard models for organic BEDT-TTF salts on anisotropic triangular lattices. For θ- and α-type salts, the lattice distortion pattern in the charge-ordered ground state governs the easiness of the insulator-to-metal transition. For κ-type salts, the energy of photoexcitation in the dimer-Mott phase determines whether the insulator-to-metal transition is controlled by the bandwidth or the band filling.

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