Faculté des sciences

Correlation effects in the low-energy region of nickel photoemission spectra

Manghi, F. ; Bellini, V. ; Osterwalder, J. ; Kreutz, T. J. ; Aebi, Philipp ; Arcangeli, C.

In: Physical Review B, 1999, vol. 59, no. 16, p. 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... More

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    Summary
    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.