Probing single magnon excitations in Sr2IrO4 using O K-edge resonant inelastic x-ray scattering
Liu, X., M.P.M. Dean, J. F. Liu, S.G. Chiuzbəian, N. Jaouen, A. Nicolaou, W.G. Yin, C.R. Serrao, Ramamoorthy Ramesh, H. Ding, J.P. Hill
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.
Journal of Physics Condensed Matter
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