Electronic Transport through YBCO Grain Boundary Interfaces between 4.2 K and 300 K

Details Electronic Transport through YBCO Grain Boundary Interfaces between 4.2 K and 300 K Electronic Transport through YBCO Grain Boundary Interfaces between 4.2 K and 300 K

2003-07-18

arxiv.org/abs/cond-mat/0307470v2

Phys. Rev. Lett. 92, 257003 (2004)

Physics

Condensed Matter

Superconductivity

14 pages, 4 figures

Scientific paper

10.1103/PhysRevLett.92.257003

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.

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