Publication details.

Paper

Year:1990
Author(s):J. Costa-Quintana, Lopez-Aguilar F., Balle S., Salvador R.,
Title:Quasiparticle band structure for the Hubbard systems: Application to -CeAl2
Journal:PHYSICAL REVIEW B
ISSN:2469-9950
Volume:41
Issue No.:10
Pages:7096-7102
D.O.I.:10.1103/PhysRevB.41.7096
Web:http://dx.doi.org/10.1103/PhysRevB.41.7096
Abstract:

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.