Josephson coupling across a long single-crystalline Cu nanowire

O. V. Skryabina, S. V. Egorov, A. S. Goncharova, A. A. Klimenko, S. N. Kozlov, V.V. Ryazanov, S. V. Bakurskiy, M. Yu Kupriyanov, A. A. Golubov, K. S. Napolskii, V.S. Stolyarov

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Abstract

We report on a fabrication method and electron-transport measurements for submicron Josephson junctions formed by Cu nanowires coupling to superconducting planar Nb electrodes. The Cu nanowires with a resistivity of ρ C:1 μ Ω cm at low temperatures consisting of single-crystalline segments have been obtained by templated electrodeposition using anodic aluminum oxide as a porous matrix. The current-voltage characteristics of the devices have been studied as a function of temperature and magnetic field. For all junctions, the critical current monotonically decreases with a magnetic field. The measured temperature and magnetic field dependencies are consistent with the model for one-dimensional diffusive superconductor/normal metal/superconductor (SNS) Josephson junctions within the quasiclassical theory of superconductivity.

Original languageEnglish
Article number222605
JournalApplied physics letters
Volume110
Issue number22
DOIs
Publication statusPublished - 29 May 2017

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Skryabina, O. V., Egorov, S. V., Goncharova, A. S., Klimenko, A. A., Kozlov, S. N., Ryazanov, V. V., ... Stolyarov, V. S. (2017). Josephson coupling across a long single-crystalline Cu nanowire. Applied physics letters, 110(22), [222605]. https://doi.org/10.1063/1.4984605