Optical conductivity of CuO₂ infinite-layer films
Dore, P. · Calvani, P. · De Marzi, G. · Paolone, A. · Lupi, S. · Balestrino, G. · Petrocelli, G. · Desfeux, R.
Original · EN
The infrared conductivity of CaCuO₂, SrCuO₂₋y, and Sr₀.₈₅Nd₀.₁₅CuO₂ infinite-layer films is obtained from reflectivity measurements by taking into account the substrate contribution. SrCuO₂₋y and Sr₀.₈₅Nd₀.₁₅CuO₂ exhibit extra-phonon modes and structured bands in the midinfrared, not found in stoichiometric CaCuO₂. These features mirror those observed in the perovskitic cuprates, thus showing that the polaronic properties of high-Tc superconductors are intrinsic to the CuO₂ planes.
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