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Critical Current Enhancement due to an Electric Field in a Granular d-Wave Superconductor

Daniel Dominguez, Cristina Wiecko, Jorge V. Jose

cond-mat.supr-conarXiv:cond-mat/9905040

Abstract

We study the effects of an electric-field in the transport properties of bulk granular superconductors with different kinds of disorder. We find that for a d-wave granular superconductor with random π-junctions the critical current always increases after applying a strong electric field, regardless of the polarity of the field. This result plus a change in the voltage as a function of the electric field are in good agreement with experimental results in ceramic high Tc superconductors.

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