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

✍ Scribed by F. Tafuri; A. Tagliacozzo; D. Born; D. Stornaiuolo; E. Gambale; D. Dalena; F. Lombardi

• Publisher: Elsevier Science
• Year: 2007
• Tongue: English
• Weight: 149 KB
• Volume: 460-462
• Category: Article
• ISSN: 0921-4534
• DOI: 10.1016/j.physc.2007.03.024

✦ Synopsis

Magneto-fluctuations of the normal resistance R N have been reproducibly observed in YBa 2 Cu 3 O 7Àd (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.