Direct Observation of a Temperature Dependent 0-pi Junction Transition in a Mesoscopic High Critical Temperature Grain Boundary Junction

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dc.creatorTesta, G.
dc.creatorMonaco, A.
dc.creatorEsposito, E.
dc.creatorSarnelli, E.
dc.creatorKang, D. -J.
dc.creatorTarte, E. J.
dc.creatorMennema, S. H.
dc.creatorBlamire, M. G.
dc.date2003-10-30
dc.date2003-11-12
dc.date.accessioned2026-07-07T02:54:30Z
dc.date.available2026-07-07T02:54:30Z
dc.descriptionWe have observed, for the first time, a temperature dependent 0-pi junction crossover in a 45 symmetric [001] tilt grain boundary junction. Experimental data, obtained by a double phase-sensitive test based on a low inductance dc SQUID, show an anomalous nonmonotonic temperature dependence of the Josephson current, clear evidence of a critical current sign change at a temperature T*. At the same temperature, the SQUID undergoes a transition from a 0-SQUID to a pi-SQUID. Results are in good agreement with theoretical models taking into account mid-gap states in low transparency junctions.
dc.description5 pages, 2 columns, 4 PS or EPS figures, Tex file, minor changes made
dc.identifierhttps://arxiv.org/abs/cond-mat/0310727
dc.identifierhttp://arxiv.org/abs/cond-mat/0310727
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/22574
dc.subjectSuperconductivity
dc.titleDirect Observation of a Temperature Dependent 0-pi Junction Transition in a Mesoscopic High Critical Temperature Grain Boundary Junction
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