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Observation of mesoscopic conductance fluctuations in YBa2Cu3O7-delta grain boundary Josephson junctions (Articolo in rivista)

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Observation of mesoscopic conductance fluctuations in YBa2Cu3O7-delta grain boundary Josephson junctions (Articolo in rivista) (literal)

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Tagliacozzo, A; Born, D; Stornaiuolo, D; Gambale, E; Dalena, D; Lombardi, F; Barone, A; Altshuler, BL; Tafuri, F (2007)
Observation of mesoscopic conductance fluctuations in YBa2Cu3O7-delta grain boundary Josephson junctions
in Physical review. B, Condensed matter and materials physics (Online)
(literal)

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Tagliacozzo, A; Born, D; Stornaiuolo, D; Gambale, E; Dalena, D; Lombardi, F; Barone, A; Altshuler, BL; Tafuri, F (literal)

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Univ Naples Federico II, CNR, INFM Coherentia, Naples, Italy; Univ Naples Federico II, Dipartimento Sci Fis, I-80125 Naples, Italy; Univ Naples 2, Dipartimento Ingn Informaz, Aversa, CE, Italy; Chalmers, MINA, Dept Microelect & Nanosci, S-41296 Gothenburg, Sweden; Columbia Univ, Dept Phys, New York, NY 10027 USA; NEC Labs Amer Inc, Princeton, NJ 08554 USA (literal)

Titolo

Observation of mesoscopic conductance fluctuations in YBa2Cu3O7-delta grain boundary Josephson junctions (literal)

Abstract

Magnetofluctuations of the normal-state resistance RN have been reproducibly observed in high-critical- temperature superconductor ?HTS? grain boundary junctions at low temperatures. We attribute them to meso- scopic transport in narrow channels across the grain boundary line. The Thouless energy appears to be the relevant energy scale. Our findings have significant implications for quasiparticle relaxation and coherent transport in HTS grain boundaries. (literal)

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