Correlation effects in band ferromagnets as detected by energy- and angle-resolved spin-polarized photoemission: Ni(110)

Abstract

Calculated spectra of photoemission from Ni(110) with the use of a single-step model of the photoemission process and with the inclusion of self-energy corrections within the $t$-matrix approximation are compared to the results of a recent energy-, angle-, and spin-resolved photoemission experiment with linearly polarized light ($h\ensuremath{\nu}=16.85$ eV). The power of this technique to study electronic structure of correlated, magnetic solids is for the first time fully exploited. Good agreement is found not only in peak positions, but also in relative intensities as well as line shapes. In addition, evidence is provided that surface relaxation is important for the full understanding of the electronic structure of this particular crystal surface.