Current dependent fluctuations in a Bi2Sr2CuO6+δ thin film
I. Sfar, Z. Z. Li, F. Bouquet, H. Raffy, L. Fruchter
Abstract
The current dependence of the excess conductivity is measured up to 3 Tc for a Bi2Sr2CuO6+δ thin film, as a function of doping. It is found to be anomalously sensitive to the transport current and to behave as a universal function of T/Tc in the whole doping range. We discuss these results in the perspective of a granular superconductor with a gapless-like behavior.
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