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Scattering processes of normal and fluctuating carriers in REBa2Cu3O7-δ (RE=Y, Ho) single crystals with unidirectional twin boundaries
|Ruslan V. Vovk 1, Mykhaylo A. Obolenskii 1, Alexander V. Bondarenko 1, Ioannis L. Goulatis 1, Alexander Chroneos 2,3|
1. Kharkov National University, 4 Svoboda Sq., Kharkov 61077, Ukraine
The effect of twin boundaries on the normal and fluctuation conductivity of REBa2Cu3O7-δ (RE=Y, Ho) single crystals has been investigated. The temperature dependence of the excess conductivity can be satisfactory described by the Lawrence-Doniach theoretical model. The twin boundaries are efficient scattering centers of normal and fluctuation carriers. The predicted values of the coherence length perpendicular to the ab-plane ξc(0) are in good agreement with the values determined from the magnetic measurements of stoichiometric YBaCuO crystals.
Presentation: Poster at E-MRS Fall Meeting 2006, Symposium K, by Alexander Chroneos
See On-line Journal of E-MRS Fall Meeting 2006
Submitted: 2006-04-27 08:07 Revised: 2009-06-07 00:44