Current dependent fluctuations in a Bi2Sr2CuO6+δ thin film.

Authors :: Sfar, I.
Li, Z. Z.
Bouquet, F.
Raffy, H.
Fruchter, L.
Source :: European Physical Journal B: Condensed Matter; Jul2005, Vol. 46 Issue 2, p215-221, 7p, 9 Graphs
Publication Year :: 2005
Abstract: The current dependence of the excess conductivity is measured up to ≃3T<subscript>c</subscript> for a Bi<subscript>2</subscript>Sr<subscript>2</subscript>CuO<subscript>6+δ</subscript> 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/T<subscript>c</subscript> in the whole doping range. We discuss these results in the perspective of a granular superconductor with a gapless-like behavior. [ABSTRACT FROM AUTHOR]