Highly precise comparison of Nb/Al/AlOx/Al/AlOx/Al/Nb Josephson junction arrays using a SQUID as a null detector

Highly precise comparison of Nb/Al/AlOx/Al/AlOx/Al/Nb Josephson junction arrays using a SQUID as a null detector

A direct comparison of two voltages at 0.6 V reproduced by programmable arrays with Nb/Al/AlOx/Al/AlOx/Al/Nb Josephson junctions was carried out using a SQUID as a null detector. The voltage difference was measured and was < 1.2 x 10-17 V. Jumps of the current in the flux transformer loop can be...

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Veröffentlicht in:Superconductor science & technology 2002-07, Vol.15 (7), p.1034-1036, Article 306
Hauptverfasser: Krasnopolin, I Y, Behr, R, Niemeyer, J
Format: Artikel
Sprache:eng
Schlagworte:
Applied sciences
Electronics
Exact sciences and technology
Semiconductor electronics. Microelectronics. Optoelectronics. Solid state devices
Superconducting devices
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Zusammenfassung:A direct comparison of two voltages at 0.6 V reproduced by programmable arrays with Nb/Al/AlOx/Al/AlOx/Al/Nb Josephson junctions was carried out using a SQUID as a null detector. The voltage difference was measured and was < 1.2 x 10-17 V. Jumps of the current in the flux transformer loop can be attributed to phase-slipping events when the phase lock in the arrays is broken. 11 refs.
ISSN:0953-2048
1361-6668
DOI:10.1088/0953-2048/15/7/306