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
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
P. Lucignano
Universita degli Studi di Napoli Federico II
B. Jouault
Universite de Montpellier
Floriana Lombardi
Chalmers, Microtechnology and Nanoscience (MC2), Quantum Device Physics
A. Barone
Università degli Studi della Campania Luigi Vanvitelli
B. L. Altshuler
Columbia University in the City of New York
NEC Laboratories America, Inc.
Microelectronics
0026-2692 (ISSN)
Vol. 39 8 1066-1069Subject Categories (SSIF 2011)
Physical Sciences
DOI
10.1016/j.mejo.2007.07.094