Observation of mesoscopic conductance fluctuations in YBa2Cu3O7-delta grain boundary Josephson junctions
Journal article, 2007
Magnetofluctuations of the normal-state resistance R-N have been reproducibly observed in high-critical-temperature superconductor (HTS) grain boundary junctions at low temperatures. We attribute them to mesoscopic transport in narrow channels across the grain boundary line. The Thouless energy appears to be the relevant energy scale. Our findings have significant implications for quasiparticle relaxation and coherent transport in HTS grain boundaries.
metals
high-t-c
temperature superconductors
Author
A. Tagliacozzo
D. Born
D. Stornaiuolo
E. Gambale
D. Dalena
Floriana Lombardi
Chalmers, Microtechnology and Nanoscience (MC2)
A. Barone
B. L. Altshuler
F. Tafuri
Physical Review B - Condensed Matter and Materials Physics
24699950 (ISSN) 24699969 (eISSN)
Vol. 75 1 012507-Subject Categories
Condensed Matter Physics
DOI
10.1103/PhysRevB.75.012507