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

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

1999-05-04

arxiv.org/abs/cond-mat/9905040v2

Physics

Condensed Matter

Superconductivity

Final version with updated references. To be published in Phys. Rev. Lett. (issue of Nov. 22, 1999)

Scientific paper

10.1103/PhysRevLett.83.4164

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 $\pi$-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 T_c superconductors.

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