Optical conductivity of CuO_2 infinite-layer films
arXiv:cond-mat/9702235 · doi:10.1016/S0038-1098(97)00124-5
Abstract
The infrared conductivity of CaCuO_2, SrCuO_{2-y}, and Sr_{0.85}Nd_{0.15}CuO_2 infinite-layer films is obtained from reflectivity measurements by taking into account the substrate contribution. SrCuO_{2-y} and Sr_{0.85}Nd_{0.15}CuO_2 exhibit extra-phonon modes and structured bands in the midinfrared, not found in stoichiometric CaCuO_2. These features mirror those observed in the perovskitic cuprates, thus showing that the polaronic properties of high-T_c superconductors are intrinsic to the CuO_2 planes.
File latex, 5 p. incl. 4 fig. in epsf. Submitted to Solid State Comm