Effects of Core-Hole Screening on Spin-Polarised Auger Spectra from Ferromagnetic Nickel

Details Effects of Core-Hole Screening on Spin-Polarised Auger Spectra from Ferromagnetic Nickel Effects of Core-Hole Screening on Spin-Polarised Auger Spectra from Ferromagnetic Nickel

1999-10-26

arxiv.org/abs/cond-mat/9910423v1

Acta Phys. Pol. A 97, 567 (2000)

Physics

Condensed Matter

Strongly Correlated Electrons

LaTeX, 4 pages, 1 eps figure included, Acta Physica Polonica A (in press), Physics of Magnetism '99 (Poznan, Poland)

Scientific paper

We calculate the spin- and temperature-dependent local density of states for ferromagnetic Ni in the presence of a core hole at a distinguished site in the lattice. Correlations among the valence electrons and between valence and core electrons are described within a multi-band Hubbard model which is treated by means of second-order perturbation theory around the Hartree-Fock solution. The core-hole potential causes strong screening effects in the Ni valence band. The local magnetic moment is found to be decreased by a factor 5-6. The consequences for the spin polarisation of CVV Auger electrons are discussed.

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