The present invention concerns the enhancement of critical current densities in cuprate superconductors. Such enhancement of critical current densities include using wave function symmetry and restricting movement of Abrikosov (A) vortices, Josephson (J) vortices, or Abrikosov-Josephson (A-J) vortices by using the half integer vortices associated with d-wave symmetry present in the grain boundary.
STATEMENT REGARDING FEDERAL SUPPORT
This invention was made with U.S. Government support under contract number DE-ACO2-98CH 10886, awarded by the U.S. Department of Energy. The Government has certain rights in the invention.