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.



temperature superconductors


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

1098-0121 (ISSN)

Vol. 75 012507-

Subject Categories

Condensed Matter Physics