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dc.contributor.authorKurter, Cihan
dc.contributor.authorÖzyüzer, Lütfi
dc.contributor.authorProslier, T.
dc.contributor.authorZasadzinski, John F.
dc.contributor.authorHinks, David G.
dc.contributor.authorGray, Kenneth E.
dc.date.accessioned2017-01-05T10:38:46Z
dc.date.available2017-01-05T10:38:46Z
dc.date.issued2010-06
dc.identifier.citationKurter, C., Özyüzer, L., Proslier, T., Zasadzinski, J. F., Hinks, D. G., and Gray, K. E.(2010). Counterintuitive consequence of heating in strongly-driven intrinsic junctions of Bi2 Sr2 CaCu2 O 8+δ mesas. Physical Review B - Condensed Matter and Materials Physics, 81(22). doi:10.1103/PhysRevB.81.224518en_US
dc.identifier.issn1098-0121
dc.identifier.urihttp://doi.org/10.1103/PhysRevB.81.224518
dc.identifier.urihttp://hdl.handle.net/11147/2722
dc.description.abstractAnomalously high and sharp peaks in the conductance of intrinsic Josephson junctions in Bi2 Sr2 CaCu2 O 8+δ (Bi2212) mesas have been commonly interpreted as superconducting energy gaps but here we show they are a result of strong self-heating. This conclusion follows directly from a comparison to the equilibrium gap measured by tunneling in single break junctions on equivalent crystals. As the number of junctions in the mesa, N, and thus heating increase, the peak voltages decrease and the peak width abruptly sharpens for N≥12. Clearly these widely variable features vs N cannot all represent the equilibrium properties. Our data imply that the sharp peaks represent a transition to the normal state. That it occurs at the same dissipated power for N=12-30 strongly implicates heating as the cause. Although peak sharpening due to heating is counterintuitive, as tunneling spectra usually broaden at higher temperatures, a lateral temperature gradient, leading to coexistence of normal hot spots and superconductive regions, qualitatively explains the behavior. However, a more uniform temperature profile cannot be ruled out. As the peak's width and voltage in our shortest mesa (N=6) are more consistent with the break junction data, we propose a figure of merit for Bi2212 mesas, the relative conductance peak width, such that small values signal a crossover into the strong self-heating regime. © 2010 The American Physical Society.en_US
dc.description.sponsorshipU.S. Department of Energy, Office of Science Laboratory DE-AC02-06CH11357; TÜBİTAK Project No. 106T053en_US
dc.language.isoengen_US
dc.publisherAmerican Physical Societyen_US
dc.relation.isversionof10.1103/PhysRevB.81.224518en_US
dc.rightsinfo:eu-repo/semantics/openAccessen_US
dc.subjectTunneling phenomenaen_US
dc.subjectJosephson effectsen_US
dc.subjectCrystal structureen_US
dc.titleCounterintuitive consequence of heating in strongly-driven intrinsic junctions of Bi2 Sr2 CaCu2 O 8+δ mesasen_US
dc.typearticleen_US
dc.contributor.authorIDTR5135en_US
dc.contributor.institutionauthorÖzyüzer, Lütfi
dc.relation.journalPhysical Review B - Condensed Matter and Materials Physicsen_US
dc.contributor.departmentİYTE, Fen Fakültesi, Fizik Bölümüen_US
dc.identifier.volume81en_US
dc.identifier.issue22en_US
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanıen_US


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