@article{oai:repo.qst.go.jp:00047959,
 author = {Nomura, T. and Harada, Y. and Niwa, H. and Ishii, K. and Ishikado, M. and Shamoto, S. and Jarrige, I. and 野村 拓司 and 石井 賢司},
 journal = {Physical Review B},
 month = {Jul},
 note = {Low-energy electron excitation spectra were measured on a single crystal of a  typical iron-based superconductor PrFeAsO0.7 using resonant inelastic x-ray  scattering (RIXS) at the Fe-L3 edge. Characteristic RIXS features are clearly  observed around 0.5, 1–1.5, and 2–3 eV energy losses. These excitations are  analyzed microscopically with theoretical calculations using a 22-orbital model  derived from first-principles electronic structure calculation. Based on the  agreement with the experiment, the RIXS features are assigned to Fe-d orbital  excitations which, at low energies, are accompanied by spin flipping and  dominated by Fe dyz and dxz orbital characters. Furthermore, our calculations  suggest dispersive momentum dependence of the RIXS excitations below 0.5  eV, and predict remarkable splitting and merging of the lower-energy excitations in momentum space. Those excitations, which were not observed in the present experiment, highlight the potential of RIXS with an improved energy resolution  to unravel new details of the electronic structure of the iron-based  superconductors.},
 pages = {035134-1--035134-9},
 title = {Resonant inelastic x-ray scattering study of entangled spin-orbital excitations in superconducting PrFeAsO0.7},
 volume = {94},
 year = {2016}
}