Josephson Tunnel Junctions with Nb, NbN Double-Layered Electrodes
Josephson tunnel junctions with double-layered base and counter electrodes composed of Nb and NbN have been developed. The tunneling characteristics of the junctions and the effective penetration depth of the double-layered electrodes have been measured as a function of the thicknesses of the NbN an...
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Published in | Japanese Journal of Applied Physics Vol. 21; no. 4A; p. L192 |
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Main Authors | , , , |
Format | Journal Article |
Language | English |
Published |
01.01.1982
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Online Access | Get full text |
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Summary: | Josephson tunnel junctions with double-layered base and counter electrodes composed of Nb and NbN have been developed. The tunneling characteristics of the junctions and the effective penetration depth of the double-layered electrodes have been measured as a function of the thicknesses of the NbN and Nb films. It has been found that, by using the double-layered electrodes with a 100 nm-thick-NbN film and a 50 nm-thick-Nb film, the effective penetration depth can be sufficiently decreased without losing the large gap voltage of 4.4 mV and the small subgap conductance of 14 mV. |
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ISSN: | 0021-4922 1347-4065 |
DOI: | 10.1143/JJAP.21.L192 |