Coherent quasiparticle transport in grain boundary junctions employing high-Tc superconductors

Details Coherent quasiparticle transport in grain boundary junctions employing high-Tc superconductors Coherent quasiparticle transport in grain boundary junctions employing high-Tc superconductors

2007-08-10

arxiv.org/abs/0708.1448v1

Dans European Nano Systems Worshop - ENS 2006, Paris : France (2006)

Physics

Condensed Matter

Materials Science

Submitted on behalf of TIMA Editions (http://irevues.inist.fr/tima-editions)

Scientific paper

Magneto-fluctuations of the normal resistance RN have been reproducibly observed in YBa2Cu3O7-d biepitaxial grain boundary junctions at low temperatures. We attribute them to mesoscopic transport in narrow channels across the grain boundary line, occurring in an unusual energy regime. 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.

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