High-transparency superconductor-insulator-normal- metal-insulator- superconductor Josephson junctions for digital electronics

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2 Scopus citations

Abstract

Nb/Al/AlOx/Al/AlOx/Al/Nb junctions with critical current densities, jc, up to 38kA/cm2 were fabricated. A critical voltage of Vc=1.25mV and small hysteresis (about 6% of the critical current) at 4.2 K were obtained for jc=21kA/cm2. Also, Nb/Al/AlOx/Al/Nb/Al/NbN junctions with jc=33kA/ cm2 and Vc=0.76mV were fabricated, where it is suggested that a second tunnel barrier at the Al/NbN interface is present as a result of Al nitridation during NbN deposition.

Original languageEnglish (US)
Pages (from-to)1273-1275
Number of pages3
JournalApplied Physics Letters
Volume81
Issue number7
DOIs
StatePublished - Aug 12 2002

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

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