Quasiparticle band structure for the Hubbard systems: Application to -CeAl2

J. Costa-Quintana, F. Lopez-Aguilar, S. Balle, R. Salvador

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3 Citations (Scopus)


A self-energy formalism for determining the quasiparticle band structure of the Hubbard systems is deduced. The self-energy is obtained from the dynamically screened Coulomb interaction whose bare value is the correlation energy U. A method for integrating the Schrödingerlike equation with the self-energy operator is given. The method is applied to the cubic Laves phase of -CeAl2 because it is a clear Hubbard system with a very complex electronic structure and, moreover, this system provides us with sufficient experimental data for testing our method. © 1990 The American Physical Society.
Original languageEnglish
Pages (from-to)7096-7102
JournalPhysical Review B-Condensed Matter
Issue number10
Publication statusPublished - 1 Jan 1990


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