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Abstract:
Soft x-ray linear and circular dichroism (XLD, XMCD) experiments at the
Ce M-4,M-5 edges are being used to determine the energy scales
characterizing the Ce 4f degrees of freedom in the ultrathin ordered
surface intermetallic CeAgx/Ag(111). We find that all relevant
interactions, i.e., Kondo scattering, crystal field splitting and
magnetic exchange coupling occur on small scales. Our study demonstrates
the usefulness of combining x-ray absorption experiments probing the
temperature dependence of both linear and circular dichroism owing to
their strong sensitivity for anisotropies in both charge distribution
and paramagnetic response, respectively.
