Mesoscopic conductance fluctuations in YBa${}_2$Cu${}_3$O${}_{7-\delta }$ grain boundary Junction at low temperature

A. Tagliacozzo, F. Tafuri, E. Gambale +7

The magneto-conductance in YBCO grain boundary Josephson junctions, displays fluctuations at low temperatures of mesoscopic origin. The morphology of the junction suggests that tra…