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Far-infrared reflectivity and dynamical conductivity of YBa2Cu3O7

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Ose, W. ; Obermayer, P. E. ; Otto, H. H. ; Zetterer, T. ; Lengfellner, Hans ; Tasler, N. ; Keller, J. ; Renk, Karl Friedrich
Date of publication of this fulltext: 08 Dec 2010 08:31


For a sintered YBa2Cu3O7 sample that shows high far-infrared reflectivity we determined, by a Kramers-Kronig analysis, the dynamical conductivity and extracted contributions by free charge carriers and phonons. The low temperature conductivity, and also results of a tunnel experiment, can be described by a distribution of energy gaps around 2Δ/kTc reverse similar, equals 4.6. Furthermore we ...


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