Disentangling multipole resonances through a full x-ray polarization analysis
Strongly Correlated Electrons
2009-11-11 v3
Abstract
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 polarized x-rays by diffraction at the Cr pre-edge (E = 5994 eV). The physical mechanism behind this phenomenon is a subtle interference effect between purely dipole (E1-E1) and purely quadrupole (E2-E2) 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 to single out and identify the different multipole order parameters involved.
Cite
@article{arxiv.cond-mat/0611239,
title = {Disentangling multipole resonances through a full x-ray polarization analysis},
author = {C. Mazzoli and S. B. Wilkins and S. Di Matteo and B. Detlefs and C. Detlefs and V. Scagnoli and L. Paolasini and P. Ghigna},
journal= {arXiv preprint arXiv:cond-mat/0611239},
year = {2009}
}
Comments
6 pages, 6 figures