Magnetic dichroism in photoemission as a spin-resolving probe for electronic correlations

Abstract

Magnetic dichroism with unpolarized x rays in angle-resolved photoemission has been systematically investigated for the $2p$ core levels of Fe, Co, and Ni. In contrast to Fe $2p$, we find the dichroism in the Ni $2p$ spectra to be mainly governed by electronic correlations. The fine structure observed in the Co $2p$ spectrum indicates a distinct influence of many-body interactions also in this material.