We report the observation of temperature dependent electronic excitations in various manganites utilizing resonant inelastic x-ray scattering (RIXS) at the Mn K-edge. Excitations were observed between 1.5 and 16 eV with temperature dependence found as high as 10 eV. The change in spectral weight between 1.5 and 5 eV was found to be related to the magnetic order and independent of the conductivity. On the basis of LDA+U and Wannier function calculations, this dependence is associated with intersite d-d excitations. Finally, the connection between the RIXS cross-section and the loss function is addressed.
@article{arxiv.cond-mat/0407326,
title = {Temperature dependent d-d excitations in manganites probed by resonant inelastic x-ray scattering},
author = {S. Grenier and J. P. Hill and V. Kiryukhin and W. Ku and Y. -J. Kim and K. J. Thomas and S-W. Cheong and Y. Tokura and Y. Tomioka and D. Casa and T. Gog},
journal= {arXiv preprint arXiv:cond-mat/0407326},
year = {2009}
}