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- W2062318152 abstract "Abstract It is shown that more distant electron interactions strongly affect the self energy of a doubly occupied or vacant site in a half filled band system. This means that the effective electron on site electron-electron interaction as used in the Hubbard Hamiltonian is strongly influenced by electronic polarization effects. We show that these polarization effects are strongly dependent on the state of the system (i.e. semiconducting or metallic) and on the number of “free” carriers. This explains why many materials are metals in spite of a large bare on site electron-electron interaction and provides a means for obtaining a semiconductor to metal transition with increasing temperature." @default.
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- W2062318152 date "1975-09-01" @default.
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- W2062318152 title "Electronic polarization reduction of the on site electron-electron repulsion" @default.
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- W2062318152 doi "https://doi.org/10.1016/0038-1098(75)90536-0" @default.
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