Coherent quasiparticle transport in grain boundary junctions employing high-T-c superconductors
Paper in proceeding, 2006
Magneto-fluctuations of the normal resistance R-N have been reproducibly observed in YBa2Cu3O7-delta biepitaxial grain boundary junctions at low temperatures. We attribute them to mesoscopic transport in narrow channels across the grain boundary line, occurring even in the presence of large voltage drops. The Thouless energy appears to be the relevant energy scale. Possible implications on the understanding of coherent transport of quasiparticles in high critical temperature superconductors (HTS) and of the dissipation mechanisms are discussed. (c) 2007 Elsevier Ltd. All rights reserved.
high T-c superconductors
mesoscopic transport
Author
F. Tafuri
University of Campania Luigi Vanvitelli
University of Naples Federico II
A. Tagliacozzo
University of Naples Federico II
D. Born
University of Naples Federico II
D. Stornaiuolo
University of Naples Federico II
E. Gambale
University of Campania Luigi Vanvitelli
D. Dalena
University of Campania Luigi Vanvitelli
P. Lucignano
University of Naples Federico II
B. Jouault
University of Montpellier
Floriana Lombardi
Chalmers, Microtechnology and Nanoscience (MC2), Quantum Device Physics
A. Barone
University of Campania Luigi Vanvitelli
B. L. Altshuler
Columbia University
NEC Laboratories America, Inc.
Microelectronics
0026-2692 (ISSN)
Vol. 39 8 1066-1069Subject Categories
Physical Sciences
DOI
10.1016/j.mejo.2007.07.094