Correlation effects in the low-energy region of nickel photoemission spectra
Kreutz, T. J.
Date de parution
Physical Review B, American Physical Society (APS), 1999/59/16/R0409-R10412
The role of on-site correlation in the low-energy excitations of nickel is studied by comparing the results of high-angular and high-energy resolution photoemission spectroscopy with quasiparticle states calculated as a three-body scattering solution of a multiorbital Hubbard model. It is found that correlation effects modify the energy dispersion and spin polarization of electron states and are essential in order to get a quantitative agreement with experimental data.
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