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Coherent quasiparticle transport in grain boundary junctions employing high-T-c superconductors

F. Tafuri ; A. Tagliacozzo ; D. Born ; D. Stornaiuolo ; E. Gambale ; D. Dalena ; P. Lucignano ; B. Jouault ; Floriana Lombardi (Institutionen för mikroteknologi och nanovetenskap, Kvantkomponentfysik) ; A. Barone ; B. L. Altshuler
MICROELECTRONICS JOURNAL (0026-2692 ). Vol. 39 (2006), 8, p. 1066-1069 .
[Konferensbidrag, refereegranskat]

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.

Nyckelord: mesoscopic transport, high T-c superconductors



Denna post skapades 2009-10-20.
CPL Pubid: 100372

 

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Institutioner (Chalmers)

Institutionen för mikroteknologi och nanovetenskap, Kvantkomponentfysik

Ämnesområden

Fysik

Chalmers infrastruktur