Temperature dependent d-d excitations in manganites probed by resonant inelastic x-ray scattering
S. Grenier, J. P. Hill, V. Kiryukhin, W. Ku, Y. -J. Kim, K. J. Thomas, S-W. Cheong, Y. Tokura, Y. Tomioka, D. Casa, T. Gog
Abstract
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.
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