Excitation spectra of the Ce monopnictides within dynamical mean-field theory

J. Lægsgaard and A. Svane
Phys. Rev. B 58, 12817 – Published 15 November 1998
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Abstract

The excitation spectra of the Ce monopnictides CeN, CeP, and CeAs are calculated using a lattice tight-binding model including the local Coulomb repulsion U on the Ce 4f orbitals. The model is treated within the dynamical mean-field theory, whereby the problem is mapped onto an effective Anderson impurity model. This is solved in a finite-U extension of the noncrossing approximation, including lowest-order crossing diagrams. The lattice model is parametrized by means of ab initio calculations. The calculated spectra are in good agreement with experiment. In particular, dispersive quasiparticle peak positions are found close to the Fermi edge in CeP. CeN shows metallic Fermi-liquid behavior with a correlation-induced mass enhancement factor of 5 around the Fermi level.

  • Received 29 June 1998

DOI:https://doi.org/10.1103/PhysRevB.58.12817

©1998 American Physical Society

Authors & Affiliations

J. Lægsgaard and A. Svane

  • Institute of Physics and Astronomy, University of Aarhus, DK-8000 Aarhus C, Denmark

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Vol. 58, Iss. 19 — 15 November 1998

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