Disentangling multipole resonances through a full x-ray polarization analysis
作者： C. Mazzoli , S. B. Wilkins , S. Di Matteo , B. Detlefs , C. Detlefs
DOI: 10.1103/PHYSREVB.76.195118
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摘要: Complete polarization analysis applied to resonant x-ray scattering at the Cr K edge in K2CrO4 shows that incident linearly polarized x rays can be converted into circularly by diffraction pre-edge (E=5994eV) . The physical mechanism behind this phenomenon is a subtle interference effect between purely dipole (E1-E1) and quadrupole (E2-E2) transitions, leading phase shift respective amplitudes. This may exploited disentangle two close-lying resonances appear as single peak conventional energy scan, way allowing one out identify different multipole order parameters involved.
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