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Mesoscopic conductance fluctuations in high-T-c grain boundary Josephson junctions: Coherent quasiparticle transport

F. Tafuri ; A. Tagliacozzo ; D. Born ; D. Stornaiuolo ; E. Gambale ; D. Dalena ; Floriana Lombardi (Institutionen för mikroteknologi och nanovetenskap, Kvantkomponentfysik)
Physica C: Superconductivity Vol. 460-462 (2007), Part 1, p. 343-346 .
[Artikel, refereegranskad vetenskaplig]

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.


Proceedings of the 8th International Conference on Materials and Mechanisms of Superconductivity and High Temperature Superconductors - M2S-HTSC VIII



Denna post skapades 2008-12-19. Senast ändrad 2009-01-22.
CPL Pubid: 82362

 

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Institutioner (Chalmers)

Institutionen för mikroteknologi och nanovetenskap, Kvantkomponentfysik

Ämnesområden

Fysik

Chalmers infrastruktur