Journal
PHYSICAL REVIEW B
Volume 84, Issue 2, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevB.84.020403
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We determine how the elementary excitations of iridium-oxide materials, which are dominated by a strong relativistic spin-orbit coupling, appear in resonant inelastic x-ray scattering (RIXS). Whereas the RIXS spectral weight at the L-2 x-ray edge vanishes in the limit of cubic symmetry, we find it to be strong at the L-3 edge. Applying this to Sr2IrO4, we observe that RIXS, besides being sensitive to local doublet-to-quartet transitions, meticulously maps out the strongly dispersive delocalized excitations of the low-lying spin-orbit doublets.
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