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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 and F Gervais |
| Institution: | (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 |
| 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 |
| 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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