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- W1986664611 abstract "Within the functional integral treatment it is shown, that local magnetic moments for the conventional half-filled Hubbard model with repulsive correlation correspond to charge densities for an attractive correlation. Inclusion of electron—phonon interaction leads to a renormalization of repulsion energy and to a charge-ordered state for a negative effective Ũ. Fluctuations in the effective charge field turn out to be important in this region. Mit der Methode der funktionalen Integration wird gezeigt, daß lokale magnetische Momente im gewöhnlichen halbgefüllten Hubbardmodell mit positiver Korrelationsenergie Ladungsdichten bei negativer Korrelationsenergie entsprechen. Berücksichtigung der Elektron—Phonon-Wechsel-wirkung führt zu einer Renormalisierung der Coulombenergie und zu einem ladungsgeordneten Zustand für negatives effektives Ũ. Fluktuationen im effektiven Ladungsfeld sind in diesem Gebiet bedeutend." @default.
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- W1986664611 date "1979-04-01" @default.
- W1986664611 modified "2023-10-18" @default.
- W1986664611 title "On the charge-ordered solution of the half-filled Hubbard model" @default.
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- W1986664611 doi "https://doi.org/10.1002/pssb.2220920222" @default.
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