caa a22 4500 445382406 CHVBK 20180317143021.0 cr unu---uuuuu 170323e20110101xx s 000 0 eng 10.1007/s10948-010-1049-5 doi (NATIONALLICENCE)springer-10.1007/s10948-010-1049-5 The I C R N Value in Intrinsic Josephson Tunnel Junctions inBi2Sr2CaCu2O8+ δ (Bi2212) Mesas [Elektronische Daten] [C. Kurter, L. Ozyuzer, J. Zasadzinski, D. Hinks, K. Gray] 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, I C, among junctions in the mesa. The Bi2212 crystals with a bulk T C=74K are overdoped and display negligible pseudogap effects allowing an accurate measure of the normal state resistance, R N. These properties make the mesas nearly ideal for the determination of the Josephson I C R N product. We find I C R N values consistently ∼30% of the quasiparticle gap parameter, Δ/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 I C R N. The results indicate that the c-axis transport is a mixture of coherent and incoherent tunneling. Springer Science+Business Media, LLC, 2010 Josephson tunneling nationallicence ICRNproduct nationallicence Bi2212 mesas nationallicence Kurter C. Materials Science Division, Argonne National Laboratory, 60439, Argonne, IL, USA aut Ozyuzer L. Materials Science Division, Argonne National Laboratory, 60439, Argonne, IL, USA aut Zasadzinski J. Materials Science Division, Argonne National Laboratory, 60439, Argonne, IL, USA aut Hinks D. Materials Science Division, Argonne National Laboratory, 60439, Argonne, IL, USA aut Gray K. Materials Science Division, Argonne National Laboratory, 60439, Argonne, IL, USA aut Journal of Superconductivity and Novel Magnetism Springer US; http://www.springer-ny.com 24/1-2(2011-01-01), 101-104 1557-1939 24:1-2<101 2011 24 10948 https://doi.org/10.1007/s10948-010-1049-5 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s10948-010-1049-5 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Kurter C. Materials Science Division, Argonne National Laboratory, 60439, Argonne, IL, USA aut NATIONALLICENCE 700 1- Ozyuzer L. Materials Science Division, Argonne National Laboratory, 60439, Argonne, IL, USA aut NATIONALLICENCE 700 1- Zasadzinski J. Materials Science Division, Argonne National Laboratory, 60439, Argonne, IL, USA aut NATIONALLICENCE 700 1- Hinks D. Materials Science Division, Argonne National Laboratory, 60439, Argonne, IL, USA aut NATIONALLICENCE 700 1- Gray K. Materials Science Division, Argonne National Laboratory, 60439, Argonne, IL, USA aut NATIONALLICENCE 773 0- Journal of Superconductivity and Novel Magnetism Springer US; http://www.springer-ny.com 24/1-2(2011-01-01), 101-104 1557-1939 24:1-2<101 2011 24 10948 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer