Abstract
Complete polarization analysis applied to resonant x-ray scattering at the Cr edge in shows that incident linearly polarized x rays can be converted into circularly polarized x rays by diffraction at the Cr pre-edge . The physical mechanism behind this phenomenon is a subtle interference effect between purely dipole and purely quadrupole transitions, leading to a phase shift between the respective scattering amplitudes. This effect may be exploited to disentangle two close-lying resonances that appear as a single peak in a conventional energy scan, in this way allowing one to single out and identify the different multipole order parameters involved.
- Received 2 July 2007
DOI:https://doi.org/10.1103/PhysRevB.76.195118
©2007 American Physical Society