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...

Full description

Saved in:
Bibliographic Details
Published inJapanese Journal of Applied Physics Vol. 21; no. 4A; p. L192
Main Authors Shoji, Akira, Shinoki, Fujitoshi, Kosaka, Shin, Hayakawa, Hisao
Format Journal Article
LanguageEnglish
Published 01.01.1982
Online AccessGet full text

Cover

More Information
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.
ISSN:0021-4922
1347-4065
DOI:10.1143/JJAP.21.L192