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Title: The ICRN value in intrinsic Josephson tunnel Junctions in Bi2Sr2CaCu2O8+? (Bi2212) mesas
Authors: Kurter, Cihan
Özyüzer, Lütfi
Hinks, David G.
Gray, Kenneth E.
Zasadzinski, John F.
Özyüzer, Lütfi
Keywords: Josephson tunneling
I C R N product
Bi2212 mesas
Tunnel junctions
Issue Date: Jan-2011
Publisher: Springer Verlag
Source: Kurter, C., Özyüzer, L., Zasadzinski, J. F., Hinks, D. G., and Gray, K. E. (2011). The ICRN value in intrinsic Josephson tunnel junctions in Bi2Sr2CaCu2O8+δ (Bi2212) mesas. Journal of Superconductivity and Novel Magnetism, 24(1-2), 101-104. doi:10.1007/s10948-010-1049-5.
Abstract: The c-axis current-voltage I(V) characteristics have been obtained on a set of mesas of varying height sculpted on Bi2Sr2CaCu2O8+δ (Bi2212) crystals intercalated with HgB2. The intercalation, along with the small number of junctions in the mesa, N = 6–30, minimizes the degree of self-heating, leading to a consistent Josephson critical current, IC, among junctions in the mesa. The Bi2212 crystals with a bulk TC =74 K are overdoped and display negligible pseudogap effects allowing an accurate measure of the normal state resistance, RN. These properties make themesas nearlyideal for the determinationof the Josephson ICRN product.Wefind ICRN valuesconsistently ∼30% of the quasiparticle gap parameter, /e, which was measured independently using a mechanical contact, break junction technique. The latter was necessitated by higher bias heating effects in the mesas which prevented direct measurements of the superconducting gap. These values are among the highest reported and may represent the maximum intrinsic value for ICRN. The results indicate that the c-axis transport is a mixture of coherent and incoherent tunneling.
ISSN: 1557-1947
Appears in Collections:Physics / Fizik
Scopus İndeksli Yayınlar Koleksiyonu / Scopus Indexed Publications Collection
WoS İndeksli Yayınlar Koleksiyonu / WoS Indexed Publications Collection

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