d-d Excitations in Manganites Probed by Resonant Inelastic X-ray Scattering

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Grenier S, Hill JP, Kiryukhin V, Ku W, Kim YJ, Thomas KJ, Cheong SW, Tokura Y, Tomioka Y, Casa D, Gog T

Abstract:
We report a study of electronic excitations in manganites exhibiting a range of ground states, using resonant inelastic x-ray scattering (RIXS) at the Mn K edge. Excitations with temperature dependent changes correlated with the magnetism were observed as high as 10 eV. By calculating Wannier functions, and finite-q response functions, we associate this dependence with intersite d-d excitations. The calculated dynamical structure factor is found to be similar to the RIXS spectra.