By applying a strong electric field perpendicular to the surface of an ultrathin, highly uniform epitaxial YBa2Cu3O7¿x film, the critical current was depressed and enhanced over 20% at temperatures close to Tc, and 5% at lower temperatures. Careful analysis of the electric field dependent I-V characteristics and Arrhenius plots indicate that the electric field effect can be interpreted as a change in the pinning potential and/or the vortex-antivortex interaction potential in the Kosterlitz-Thouless regime, as a result of a change in the carrier density in the superconductor.
|Number of pages||2|
|Issue number||Part 1|
|Publication status||Published - 1994|
|Event||20th International Conference on Low Temperature Physics, LT-20 1993 - Eugene, United States|
Duration: 4 Aug 1993 → 11 Aug 1993
Conference number: 20