Finite-Temperature Phase Diagram of Quasi-One-Dimensional Molecular Conductors: Quantum Monte Carlo Study(Condensed matter: electronic structure and electrical, magnetic, and optical properties)
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概要
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Finite-temperature phase transitions in quasi-one-dimensional quarter-filled systems are investigated using the extended Hubbard model with electron-lattice coupling. By a quantum Monte Carlo method combined with interchain mean-field approximation, we clarify competing and coexisting behaviors among charge ordering, dimer Mott, and spin-Peierls states. It is pointed out that an anharmonicity of lattice distortions plays an important role in multicritical behaviors. The results are compared with experimental data for quasi-one-dimensional molecular conductors such as DCNQI and TMTTF compounds.
- 2008-11-15
著者
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OTSUKA Yuichi
CREST, Japan Science and Technology Agency
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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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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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Otsuka Yuichi
Crest Japan Science And Technology Agency:synchrotron Radiation Research Center Japan Atomic Energy
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