Study of Nb-based Josephson tunnel junctions

Azusa Matsuda*, Takahiro Inamura, Haruo Yoshikiyo

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

18 Citations (Scopus)


Nb-based Josephson junctions are photographically fabricated with an improved lift-off method. Aging properties of Nb/Pb junctions are studied and the possible origin of aging was pointed out, using the shape dependence and IJ-H characteristics. The I-V characteristics of Nb/Pb junctions were analyzed quantitatively using a proximity effect model based on McMillan's tunneling model. Maximum Josephson current was calculated incorporating the strong coupling correction. Theory and experiment agreed well for both pair and quasiparticle density of states.

Original languageEnglish
Pages (from-to)4310-4316
Number of pages7
JournalJournal of Applied Physics
Issue number8
Publication statusPublished - 1980
Externally publishedYes

ASJC Scopus subject areas

  • Physics and Astronomy(all)


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