Electronic Transport through YBCO Grain Boundary Interfaces between 4.2 K and 300 K
arXiv:cond-mat/0307470 · doi:10.1103/PhysRevLett.92.257003
Abstract
The current-induced dissipation in YBCO grain boundary tunnel junctions has been measured between 4.2 K and 300 K. It is found that the resistance of 45 degree (100)/(110) junctions decreases linearly by a factor of four when their temperature is increased from 100 K to 300 K. At the superconducting transition temperature Tc the grain boundary resistance of the normal state and of the superconducting state extrapolate to the same value.
14 pages, 4 figures