Finite-Temperature Phase Transitions in Quasi-One-Dimensional Molecular Conductors(Condensed matter: electronic structure and electrical, magnetic, and optical properties)
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概要
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Phase transitions in 1/4-filled quasi-one-dimensional molecular conductors are studied theoretically on the basis of extended Hubbard chains including electron-lattice interactions coupled by interchain Coulomb repulsion. We apply the numerical quantum transfer-matrix method to an effective one-dimensional model, treating the interchain term within mean-field approximation. Finite-temperature properties are investigated for the charge ordering, the "dimer Mott" transition (bond dimerization), and the spin-Peierls transition (bond tetramerization). A coexistent state of charge order and bond dimerization exhibiting dielectricity is predicted in a certain parameter range, even when intrinsic dimerization is absent.
- 2007-01-15
著者
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SEO Hitoshi
Synchrotron Radiation Research Center, Japan Atomic Energy Agency, SPring-8
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MOTOME Yukitoshi
Devartment of Applied Physics. University of Tokyo
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KATO Takeo
Institute for Solid State Physics, University of Tokyo
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Seo Hitoshi
Synchrotron Radiation Research Center Japan Atomic Energy Agency Spring-8
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Seo Hitoshi
Synchrotron Radiation Research Center Japan Atomic Energy Agency
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Seo Hitoshi
Non-equilibrium Dynamics Project Erato-jst Co Kek
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Motome Yukitoshi
Department Of Applied Physics University Of Tokyo
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Kato Takeo
Institute For Solid State Physics University Of Tokyo
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Kato Takeo
Institute For Solid State Physics The University Of Tokyo
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