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arxiv: cond-mat/9702235 · v1 · submitted 1997-02-27 · ❄️ cond-mat.supr-con

Optical conductivity of CuO₂ infinite-layer films

P. Dore , P. Calvani , G. De Marzi , A. Paolone , S. Lupi (INFM - Dip. di Fisica , Universita' di Roma La Sapienza , Roma , Italy)
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G. Balestrino G. Petrocelli R. Desfeux (INFM - Dip. di Scienze Fisiche ed Energetiche Universita' di Tor Vergata
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classification ❄️ cond-mat.supr-con
keywords cacuoconductivityfilmsinfinite-layersrcuoaccountbandscontribution
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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.

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