Multiplet Effects in the Quasiparticle Band Structure of the f1-f2 Anderson Model
B. R. Trees, A. J. Fedro, M. R. Norman
Abstract
In this paper, we examine the mean field electronic structure of the f1-f2 Anderson lattice model in a slave boson approximation, which should be useful in understanding the physics of correlated metals with more than one f electron per site such as uranium-based heavy fermion superconductors. We find that the multiplet structure of the f2 ion acts to quench the crystal field splitting in the quasiparticle electronic structure. This is consistent with experimental observations in such metals as UPt3.
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