JOSEPHSON DEVICES FABRICATED WITH HIGH TC YBaCuO THIN FILMS

Abstract

A superconducting Josephson junction is created in high Tc superconducting film, with a bridge connecting two superconducting banks, by subjecting the bridge to a tunneling electron current from a sharp electrode close to the bridge. The tunneling current alters the structure over atomic dimensions to create a weak link of length comparable to high Tc coherence lengths so as to permit phase coherent Cooper pair current flow across the weak link.