@article{ulrich_ament_ghiringhelli_braicovich_sala_pezzotta_schmitt_khaliullin_brink_roth_et al._2009, 
  title={Momentum dependence of orbital excitations in Mott-insulating titanates}, 
  abstractNote={High-resolution resonant inelastic x-ray scattering has been used to
determine the momentum dependence of orbital excitations in Mott-insulating
LaTiO_3 and YTiO_3 over a wide range of the Brillouin zone. The data are
compared to calculations in the framework of lattice-driven and
superexchange-driven orbital ordering models. A superexchange model in which
the experimentally observed modes are attributed to two-orbiton excitations
yields the best description of the data.}, 
  author={Ulrich and Ament and Ghiringhelli and Braicovich and Sala and Pezzotta and Schmitt and Khaliullin and Brink and Roth and et al.}, 
  year={2009}, 
  month={Aug}
  }