Infrared response of ordered polarons in layered perovskites.

  title={Infrared response of ordered polarons in layered perovskites.},
  author={Calvani and Paolone and Dor{\'e} and Lupi and Maselli and Medaglia and Cheong},
  journal={Physical review. B, Condensed matter},
  volume={54 14},
We report on the infrared absorption spectra of three oxides where charged superlattices have been recently observed in diffraction experiments. In La 1.67 Sr 0.33 NiO 4 , polaron localization is found to suppress the low-energy conductivity through the opening of a gap and to split the E 2u-A 2u vibra-tional manifold of the oxygen octahedra. Similar… CONTINUE READING