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Current dependent fluctuations in a Bi$_2$Sr$_2$CuO$_{6+δ}$ thin film

I. Sfar·Z. Z. Li·F. Bouquet·H. Raffy·L. Fruchter
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Abstract

The current dependence of the excess conductivity is measured up to $\simeq 3 T_c$ for a Bi$_2$Sr$_2$CuO$_{6+δ}$ 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 $T/T_c$ 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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I. Sfar, Z. Z. Li, F. Bouquet, H. Raffy, L. Fruchter. 2005-05-11. Current dependent fluctuations in a Bi$_2$Sr$_2$CuO$_{6+δ}$ thin film. https://doi.org/10.1140/epjb%2Fe2005-00224-2

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