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dc.contributor.authorChang, VCYen_US
dc.contributor.authorChu, CSen_US
dc.date.accessioned2014-12-08T15:48:45Z-
dc.date.available2014-12-08T15:48:45Z-
dc.date.issued1998-09-01en_US
dc.identifier.issn0921-4526en_US
dc.identifier.urihttp://hdl.handle.net/11536/32415-
dc.description.abstractThe zero-temperature current-phase (I-phi) relation (CPR) of a mesoscopic, ballistic, and asymmetrically stacked, double superconductor-normal-metal-superconductor (SNS) junction is studied. Here phi is the phase difference between the two superconducting end-electrodes. The lack of configuration symmetry in such asymmetric SNSNS junctions forbids a simple choice of values for the phase phi(2), of the middle superconductor. We propose to determine the values of phi(2), by equating the currents in the two normal regions. Two features in the CPR are found. First, the CPR of the asymmetric junction has a cutoff feature, whose origin is best demonstrated in the long middle superconductor (large L-2) cases, when the critical current of the double SNS junction is bounded by the SNS junction that has the longer normal region. This cutoff feature is more pronounced for longer L-2 and for higher degree of junction asymmetry. Second, in regions other than the cutoff region, the CPR of the asymmetric junction deviates only within a few percent from the CPR of the symmetric junction which has the same total length L-Total in the normal regions and the same L-2. This is in contrast with the greater sensitivity the CPR has to the changes in L-Total or L-2. (C) 1998 Elsevier Science B.V. All rights reserved.en_US
dc.language.isoen_USen_US
dc.subjectcurrent-phase relationen_US
dc.subjectSNS junctionen_US
dc.subjectcutoff featureen_US
dc.subjectAndreev level tunnelingen_US
dc.titleCurrent-phase relation of a ballistic asymmetric double superconductor-normal-metal-superconductor junctionen_US
dc.typeArticleen_US
dc.identifier.journalPHYSICA Ben_US
dc.citation.volume252en_US
dc.citation.issue4en_US
dc.citation.spage249en_US
dc.citation.epage261en_US
dc.contributor.department電子物理學系zh_TW
dc.contributor.departmentDepartment of Electrophysicsen_US
dc.identifier.wosnumberWOS:000075039900001-
dc.citation.woscount0-
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