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Exploring small energy scales with x-ray absorption and dichroism


Haverkort,  M. W.
Maurits Haverkort, Physics of Correlated Matter, Max Planck Institute for Chemical Physics of Solids, Max Planck Society;

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Praetorius, C., Zinner, M., Hansmann, P., Haverkort, M. W., & Fauth, K. (2016). Exploring small energy scales with x-ray absorption and dichroism. Physical Review B, 93(16): 165107, pp. 1-5. doi:10.1103/PhysRevB.93.165107.

Cite as: http://hdl.handle.net/11858/00-001M-0000-002A-52F4-D
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.