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Theory of Spin-Resolved Auger-Electron Spectroscopy from Ferromagnetic 3d-Transition Metals | | T. Wegner
; M. Potthoff
; W. Nolting
; | | Date: |
26 Oct 1999 | | Journal: | Phys. Rev. B 61 (2000), 1386 | | Subject: | Strongly Correlated Electrons | cond-mat.str-el | | Abstract: | CVV Auger electron spectra are calculated for a multi-band Hubbard model including correlations among the 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 extit{direct} correlations among those electrons participating in the Auger process and the extit{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 quasi-particle band structure and the Auger spectra and investigate the influence of the core hole. | | Source: | arXiv, cond-mat/9910421 | | Services: | Forum | Review | PDF | Favorites | |
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