1999/10/26 by T. Wegner, Michael Potthoff, M. Potthoff +2 · 1 citation
Physics and Astronomy · #Advanced Chemical Physics Studies #Magnetic properties of thin films #Physics of Superconductivity and Magnetism #cond-mat.str-el
paper · pdf · doi:10.1103/physrevb.61.1386
published as Phys. Rev. B 61 (2000), 1386 · LaTeX, 12 pages, 8 eps figures included, Phys. Rev. B (in press)
arxiv created 1999/10/26 · openalex publication_date 2000/01/01 · arxiv updated 2009/11/30 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/28
Core-valence-valence Auger electron spectra are calculated for a multiband Hubbard model including correlations among valence electrons as well as correlations between core and valence electrons. The interest is focused on the ferromagnetic 3d-transition metals. The Auger line shape is calculated from a three-particle Green function. A realistic one-particle input is taken from tight-binding band-structure calculations. Within a diagrammatic approach we can distinguish between the direct correlations among those electrons participating in the Auger process and the indirect correlations in the rest system. The indirect correlations are treated within second-order perturbation theory for the self-energy. The direct correlations are treated using the valence-valence ladder approximation and the first-order perturbation theory with respect to valence-valence and core-valence interactions. The theory is evaluated numerically for ferromagnetic Ni. We discuss the spin-resolved quasiparticle band structure and the Auger spectra and investigate the influence of the core hole.