Electric Field Induced Converse Piezoeffect in Screw Dislocated YBCO Thin Films

TL;DR

This paper proposes that electric fields can enhance the critical current in screw dislocated YBCO thin films through a converse piezoelectric effect, with the effect depending on film thickness and dislocation density.

Contribution

It introduces a novel mechanism linking electric-field effects to dislocation-induced piezoelectricity in superconducting films.

Findings

Critical current enhancement depends on electric field strength.

The effect varies with film thickness and dislocation density.

A theoretical model for the converse piezoelectric effect in dislocated YBCO is proposed.

Abstract

A possible scenario for electric-field induced critical current enhancement in screw dislocated YBCO thin films is proposed based on the converse piezoelectric effect originated from a heavily defected medium of the superconducting films in an applied electric field. The magnitude of the effect is found to depend concurrently on the film thickness and the number of dislocations inside a superconductor.