Competition of Dimerization and Charge Ordering in the Spin-Peierls State of Organic Conductors
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概要
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The effect of the charge ordering on the spin-Peicrls (SP) state has been examined by using a Pejerls-Hubbard model at quarter-filling with dimerization, on-site and nearest-neighbor repulsive interactions. By taking account of the presence of dimerization, a bond distortion is calculated variationally with the renormalization group method based on bosonization. When the charge ordering appears at V = V_c with increasing the nearest-neighbor interaction (V), the distortion exhibits a maximum due to competition between the dimerization and the charge ordering. It is shown that the second-order phase transition occurs from the SP state with the bond alternation to a mixed state with an additional component of the site alternation at V = V_c.
- 社団法人日本物理学会の論文
- 2003-06-15
著者
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SUGIURA Muneo
Department of Physics, Nagoya University
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SUZUMURA Yoshikazu
Department of Physics, Nagoya University
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Sugiura Muneo
Department Of Physics Nagoya University
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Suzumura Yoshikazu
Department Of Physics Nagoya University
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Suzumura Yoshikazu
Department Of Physics Faculty Of Science Tohoku University
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