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- W2026556906 abstract "Different kinds of instabilities (CDW, SDW, SS) in the 1D Hubbard model with pair-hopping interaction are investigated using an approximate Bethe-Salpeter equation. The study is performed at any density of electrons and for arbitrary values of the model parameters. In the absence of the on-site interaction, no transition occurs at half filling for any finite negative pair-hopping parameter, in agreement with recent results; our calculation suggests that the Penson-Kolb model (t,W) with $mid W/tmid<pi/sin k^{}_F$ behaves qualitatively like the Hubbard model (t,U). Phase diagrams of the Penson-Kolb-Hubbard model (t,U,W) at various densities are presented." @default.
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- W2026556906 date "1996-03-15" @default.
- W2026556906 modified "2023-10-18" @default.
- W2026556906 title "Ground-state instabilities in the one-dimensional Penson-Kolb-Hubbard model" @default.
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- W2026556906 doi "https://doi.org/10.1103/physrevb.53.7171" @default.
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