Infrared properties of YBa 2 Cu 3 O 7 and Bi 2 Sr 2 Ca n − 1 Cu n O 2 n + 4 thin films - Archive ouverte HAL Accéder directement au contenu
Article Dans Une Revue Physical Review B Année : 1994

Infrared properties of YBa 2 Cu 3 O 7 and Bi 2 Sr 2 Ca n − 1 Cu n O 2 n + 4 thin films

Résumé

We report room-temperature optical reflectivity and transmission measurements on a variety of YBa2Cu307 and Bi2Sr2Can -1CUn02n +4 thin films in the 500-25000 cm-1 frequency range. Reflectivity data when not biased by the substrate are used to compute the optical conductivity. A comparison of our results with published reflectivity data on single-domain YBa2Cu307 crystals suggests an overwhelming contribution of the CU02 planes {with respect to the chains} to the optical conductivity. The data can be analyzed in terms of a Drude low-frequency contribution and a so-called midinfrared band. However, the anomalous infrared response appears to be uniquely described by a generalized Drude response: for all the samples investigated, the relaxation rate (which increases linearly with frequency) and the effective mass are found to be the same as a function of frequency.
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hal-04173606 , version 1 (29-07-2023)

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A. El Azrak, R. Nahoum, N. Bontemps, M. Guilloux-Viry, C. Thivet, et al.. Infrared properties of YBa 2 Cu 3 O 7 and Bi 2 Sr 2 Ca n − 1 Cu n O 2 n + 4 thin films. Physical Review B, 1994, 49 (14), pp.9846-9856. ⟨10.1103/PhysRevB.49.9846⟩. ⟨hal-04173606⟩
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