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Advances in Condensed Matter Physics

Effects of Three-Body Interaction on the Ground-State Phase Diagram of One-Dimensional Extended Hubbard Model

俊 张

Published Jan 1, 2023• 0 citations
Publisher
DOI
10.12677/cmp.2023.122002

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At weak coupling and at half filling, we analytically study effects of an intersite three-electron density interaction (P) of the one-dimensional extended Hubbard model in addition to the usual two-electron density interactions (U,V). By the bosonization and renormalization group approaches, we obtain the ground-state phase diagram of the model. In particular, we find that even in the presence of repulsive U and V, the attractive P may give rise to the superconducting phases for 2V≤min{2|P|;4|P|−U}.