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Proceedings Paper

Critical current and electric transport properties of superconducting epitaxial Nb(Ti)N submicron structures
Author(s): A. Klimov; W. Słysz; M. Guziewicz; V. Kolkovsky; M. Węgrzecki; J. Bar; M. Marchewka; B. Seredyński
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Paper Abstract

Critical current and current-voltage characteristics of epitaxial Nb(Ti)N submicron ultrathin structures were measured as function of temperature. For 700-nm-wide bridge we found current-driven vortex de-pinning at low temperatures and thermally activated flux flow closer to the transition temperature, as the limiting factors for the critical current density. For 100-nm-wide meander we observed combination of phase-slip activation and vortex-anti-vortex pair (VAP) thermal excitation. Our Nb(Ti)N meander structure demonstrates high de-pairing critical current densities ~107 A/cm2 at low temperatures, but the critical currents are much smaller due to presence of the local constrictions.

Paper Details

Date Published: 22 December 2016
PDF: 6 pages
Proc. SPIE 10175, Electron Technology Conference 2016, 101750R (22 December 2016); doi: 10.1117/12.2258216
Show Author Affiliations
A. Klimov, Institute of Electron Technology (Poland)
W. Słysz, Institute of Electron Technology (Poland)
M. Guziewicz, Institute of Electron Technology (Poland)
V. Kolkovsky, The Institute of Physics (Poland)
M. Węgrzecki, Institute of Electron Technology (Poland)
J. Bar, Institute of Electron Technology (Poland)
M. Marchewka, Institute of Electron Technology (Poland)
B. Seredyński, Institute of Electron Technology (Poland)

Published in SPIE Proceedings Vol. 10175:
Electron Technology Conference 2016
Barbara Swatowska; Wojciech Maziarz; Tadeusz Pisarkiewicz; Wojciech Kucewicz, Editor(s)

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