Polarized infrared reflectivity study of an oriented ceramic of Bi 2 Sr 2 Ca 2 Cu 3 O 10 + δ (Bi-2223) |
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Authors: | N. Petit V. Garnier V. Ta Phuoc R. Caillard A.-M. Frelin A. Ruyter I. Laffez J.-C. Soret A. Maignan F. Gervais |
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Affiliation: | (1) Laboratory of electrodynamics of advanced materials, LRC M01 associated to CEA, FRE 2077 associated to CNRS, Fran?ois Rabelais University, 37200 Tours, France, FR;(2) CRISMAT, ISMRA, boulevard Maréchal Juin, 14050 Caen, France, FR |
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Abstract: | The reflectivity spectra of an oriented ceramic of Bi-2223 has been investigated by polarized infrared reflectivity spectroscopy in the energy range 0.005-2.2 eV. It is shown that the data for the polarization parallel to the c axis cannot be fitted with a one-component Drude or extended-Drude model. The conductivity spectrum is then obtained from the best fit of a “double-damping Drude” model to reflectivity spectra, itself derived from the factorized form of the dielectric function, and by a Kramers-Kronig inversion as well. The data and their analysis give a new insight of the 2D character of the system. Received 26 April 2001 and Received in final form 28 August 2001 |
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Keywords: | PACS. 71.38.-k Polarons and electron-phonon interactions – 63.20.Kr Phonon-electron and phonon-phonon interactions – 78.20.Ci Optical constants (including refractive index, complex dielectric constant, absorption, reflection and transmission coefficients, emissivity) |
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