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Theoretical Investigation of Current Amplitudes of Niobium–Lead Tunnel Junctions
Author(s) -
Meyer H.G.,
Seidel P.
Publication year - 1981
Publication title -
physica status solidi (b)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.51
H-Index - 109
eISSN - 1521-3951
pISSN - 0370-1972
DOI - 10.1002/pssb.2221030131
Subject(s) - niobium , josephson effect , amplitude , condensed matter physics , tunnel junction , superconductivity , pi josephson junction , current (fluid) , proximity effect (electron beam lithography) , electrode , electric current , materials science , physics , quantum tunnelling , nanotechnology , metallurgy , thermodynamics , quantum mechanics , layer (electronics) , resist , electron beam lithography
The current amplitudes in Werthamer's general expression for the current in Josephson tunnel junctions are investigated with the help of the proximity‐effect model developed for superconducting niobium tunnel junctions. Numerical calculations of these amplitudes as functions of frequency and temperature are presented for different systems forming the proximity electrode. In agreement with experiments marked differences can be stated between the proximity model and the commonly used standard BCS model also in the ac properties of the tunnel junction.