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Edge geometry superconducting tunnel junctions utilizing an NbN/MgO/NbN thin film structureAn edge defined geometry is used to produce very small area tunnel junctions in a structure with niobium nitride superconducting electrodes and a magnesium oxide tunnel barrier. The incorporation of an MgO tunnel barrier with two NbN electrodes results in improved current-voltage characteristics, and may lead to better junction noise characteristics. The NbN electrodes are preferably sputter-deposited, with the first NbN electrode deposited on an insulating substrate maintained at about 250 C to 500 C for improved quality of the electrode.
Document ID
19920012798
Acquisition Source
Legacy CDMS
Document Type
Other - Patent
Authors
Hunt, Brian D.
(California Inst. of Tech. Pasadena., United States)
Leduc, Henry G.
(Jet Propulsion Lab. California Inst. of Tech., Pasadena., United States)
Date Acquired
August 15, 2013
Publication Date
March 24, 1992
Subject Category
Solid-State Physics
Accession Number
92N22041
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.
Patent
NASA-CASE-NPO-17812-3-CU|US-PATENT-5,099,294
Patent Application
US-PATENT-APPL-SN-641798|US-PATENT-APPL-SN-387928
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