Infrared and Raman Study of the Charge-ordered State of θ-(ET)_2Cu_2CN[N(CN)_2]_2(Condensed Matter : Electronic Structure, Electrical, Magnetic and Optical Properties)

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• The polarized Raman and infrared spectra of θ-(ET)_2Cu_2CN[N(CN)_2]_2 [ET = bis(ethylenedithio)tetrathiafulvalene] were measured at various temperatures below 300 K. We investigated the three C=C stretching modes, ν_2, ν_3 and ν_<27>. The spectral pattern is compatible with the horizontally charge-ordered state, where the site-charge distributions are +0.1_7 and +0.8_3. We have found that the vibronic ν_3, bands correlate to the dihedral angles, ψ, in the θ-ET salts. This relation is well reproduced by the numerical calculation based on the cluster model with C_2 symmetry. The spectral features suggest the dynamical fluctuation of nearly localized charges even above its phase transition temperature, 〜220K.

• 社団法人日本物理学会の論文
• 2004-08-15

著者

• YAKUSHI kyuya

  Institute for Molecular Science

• KOJIMA Yasuhiko

  Department of Chemistry, Tokyo Metropolitan University

• Saito G

  Kyoto Univ. Kyoto

• Saito G

  Division Of Chemistry Graduate School Of Science Kyoto University

• Saito Gunzi

  Division Of Chemistry Graduate School Of Science Kyoto University

• Saito Gunzi

  Chemistry Department Kyoto University

• Yamamoto Takashi

  Institute of Materials Science, University of Tsukuba

• Saito Gunzi

  Depatment Of Chemistry Kyoto University

• Saito Gunji

  Department Of Chemistry Kyoto University

• Yakushi K

  Institute For Molecular Science

• Yakushi K

  Inst. Molecular Sci. Okazaki

• Yamauchi K

  Tokyo Metropolitan Univ. Tokyo

• SHIMIZU Yasuhiro

  Division of Chemistry, Graduate School of Science, Kyoto University

• SAITO Gunzi

  Research Institute, Meijo University

• Yakushi Kyuya

  Graduate University For Advanced Studies

• Shimizu Yasuhiro

  Division Of Chemistry Graduate School Of Science Kyoto University

• Yamamoto Takashi

  Institute For Molecular Science

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