Numerical Studies of Ground State Phase Diagrams for the MMX Chains |
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Authors: | Makoto Kuwabara Kenji Yonemitsu |
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Institution: | Institute for Molecular Science , Okazaki , 444-8585 , Japan |
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Abstract: | Abstract We study ground state phase diagrams for the MMX chains, using a one-dimensional dimerized 3/4-filled extended Hubbard-Peierls model with site diagonal and off-diagonal electron-lattice interactions. The ground states are obtained mainly in the Hartree-Fock approximation, and their accuracy is checked by the exact diagonalization of small clusters. We find a new phase in addition to frequently considered phases and compare our results with experimental results. |
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Keywords: | MMX chain dimerization extended Hubbard-Peierls model |
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