Publication Type:Journal Article
Source:Journal of Physics Condensed Matter, Institute of Physics Publishing, Volume 27, Number 20 (2015)
Keywords:Heavy metal elements, Heavy metals, Iridates, Iridium compounds, Magnon excitations, Oxygen K-edge, Perovskite, Resonant inelastic x-ray scattering, RIXS, Spin-orbit couplings, Strontium compounds, Transition metal elements, Transition metals, X ray scattering, X rays
Resonant inelastic x-ray scattering (RIXS) at the L-edge of transition metal elements is now commonly used to probe single magnon excitations. Here we show that single magnon excitations can also be measured with RIXS at the K-edge of the surrounding ligand atoms when the center heavy metal elements have strong spin-orbit coupling. This is demonstrated with oxygen K-edge RIXS experiments on the perovskite Sr2IrO4, where low energy peaks from single magnon excitations were observed. This new application of RIXS has excellent potential to be applied to a wide range of magnetic systems based on heavy elements, for which the L-edge RIXS energy resolution in the hard x-ray region is usually poor. © 2015 IOP Publishing Ltd.
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