Observation of the Josephson effect in Pb/(Ba,K)Fe2As2 single crystal junctions

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dc.creatorZhang, Xiaohang
dc.creatorOh, Yoon Seok
dc.creatorLiu, Yong
dc.creatorYan, Liqin
dc.creatorKim, Kee Hoon
dc.creatorGreene, Richard L.
dc.creatorTakeuchi, Ichiro
dc.date2008-12-18
dc.date2009-02-06
dc.date.accessioned2026-07-07T13:02:04Z
dc.date.available2026-07-07T13:02:04Z
dc.descriptionWe have fabricated c-axis Josephson junctions on single crystals of (Ba,K)Fe2As2 by using Pb as the counter electrode in two geometries, planar and point contact. Junctions in both geometries show resistively shunted junction I-V curves below the Tc of the counter electrode. Microwave induced steps were observed in the I-V curves, and the critical currents are suppressed with an in-plane magnetic field in a manner consistent with the small junction limit. ICRN products of up to 0.3 mV have been observed in these junctions at 4.2 K. The observation of Josephson coupling along the c-axis between (Ba,K)Fe2As2 and a conventional superconductor suggests the existence of a s-wave superconducting order parameter in this class of iron pnictide superconductors.
dc.description16 pages and 3 figures
dc.identifierhttps://arxiv.org/abs/0812.3605
dc.identifierhttp://arxiv.org/abs/0812.3605
dc.identifierPhys. Rev. Lett. 102, 147002 (2009)
dc.identifierdoi:10.1103/PhysRevLett.102.147002
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/226356
dc.subjectSuperconductivity
dc.subjectStrongly Correlated Electrons
dc.titleObservation of the Josephson effect in Pb/(Ba,K)Fe2As2 single crystal junctions
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