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- W1999262694 abstract "To investigate how far the $mathit{GW}$ approximation can treat systems with strong on-site correlations, we perform calculations of the self-energies and spectral functions of $ensuremath{alpha}$- and $ensuremath{gamma}$-Ce within the $mathit{GW}$ approximation. For this strongly correlated material, the screened interaction exhibits a complex and rich structure which is attributed to strong particle-hole transitions involving localized $4f$ states. This structure in the screened interaction is carried over to the self-energy, which in turn yields spectral functions with multiple peaks. A satellite at around 5 eV above the Fermi level is formed, which is reminiscent of the experimentally observed upper Hubbard band, while the experimentally observed peak structure below the Fermi level at $ensuremath{-}2$ eV and disappearance of the quasiparticle peak in the $ensuremath{gamma}$ phase are not reproduced." @default.
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- W1999262694 date "2012-12-26" @default.
- W1999262694 modified "2023-10-18" @default.
- W1999262694 title "Self-energy and spectral function of Ce within the<mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML display=inline><mml:mi mathvariant=italic>GW</mml:mi></mml:math>approximation" @default.
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- W1999262694 doi "https://doi.org/10.1103/physrevb.86.245126" @default.
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