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El Azrak, A., L. A. de Vaulchier, N. Bontemps, C. Thivet, M. Guilloux-Viry, A. Perrin, B. Wuyts, and E. Osquiguil. "Optical and transport measurements of YBa2Cu3O6+x thin films (0.38?x?1)." Physica C: Superconductivity and its applications 235-240, no. PART 2 (1994): 1431–1432.
Abstract: We report optical reflectivity and transmission measurements at room temperature on a set of five YBa2Cu3O6+x films for 0.38?x?, and ?{variant}(T) resistivity data down to 10K, prepared from a single YBa2Cu3O7 thin film. In contrast with x=1, as x decreases, the scattering rate deduced from the optical conductivity departs from its linear variation with ?, in correlation with the absence of linearity of ?{variant}(T) versus temperature.
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