Mesoscopic conductance fluctuations in high-T-c grain boundary Josephson junctions: Coherent quasiparticle transport
Journal article, 2007
Magneto-fluctuations of the normal resistance RN have been reproducibly observed in YBa2Cu3O7-delta (HTS) biepitaxial 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. Possible implications on the understanding of coherent transport of quasiparticles in HTS and of the dissipation mechanisms are discussed. (c) 2007 Elsevier B.V. All rights reserved.
Author
F. Tafuri
Universita degli Studi di Napoli Federico II
Università degli Studi della Campania Luigi Vanvitelli
A. Tagliacozzo
Universita degli Studi di Napoli Federico II
D. Born
Universita degli Studi di Napoli Federico II
D. Stornaiuolo
Universita degli Studi di Napoli Federico II
E. Gambale
Università degli Studi della Campania Luigi Vanvitelli
D. Dalena
Università degli Studi della Campania Luigi Vanvitelli
Floriana Lombardi
Chalmers, Microtechnology and Nanoscience (MC2), Quantum Device Physics
Physica C: Superconductivity and its Applications
0921-4534 (ISSN)
Vol. 460-462 Part 1 343-346Subject Categories (SSIF 2011)
Physical Sciences
DOI
10.1016/j.physc.2007.03.024