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- W2015177890 abstract "Abstract The quasiparticle electronic band structure of the degenerate d-band Hubbard model is investigated within second-order U -perturbation treatment of the self-energy. The influence of the k -dependent self-energy on the quasiparticle spectral density of states, energy bands and density of states is discussed. A full k -dependent self-energy leads in a non-selfconsistent approach to narrower and sharper satellite-like structure on the quasiparticle density of states. On the other hand, in a selfconsistent approach the corresponding band structure does not reveal any additional (to the main energy band) quasiparticle excitations. It is also shown, that the quasiparticle and Kohn-Sham Fermi surfaces for electrons in a three-dimensional crystal lattice are non-equivalent." @default.
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- W2015177890 date "1991-09-01" @default.
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- W2015177890 title "Quasiparticle electronic structure of the degenerate d-band Hubbard model" @default.
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- W2015177890 doi "https://doi.org/10.1016/0921-4526(91)90084-r" @default.
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