Open AccessA MICROSCOPIC THEORY OF THE JOSEPHSON EFFECT IN SUPERCONDUCTING BRIDGES
Author(s) -
Liu Fu-Sui
Publication year - 1977
Publication title -
wuli xuebao
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.199
H-Index - 47
ISSN - 1000-3290
DOI - 10.7498/aps.26.411
Subject(s) - bridge (graph theory) , superconductivity , josephson effect , physics , condensed matter physics , microwave , function (biology) , quantum mechanics , medicine , evolutionary biology , biology
The empirical formula j=Σn jnsin nφ for a superconducting Dayem bridge is proved using Green's function and the two-gap model of the bridge. A quantitative explanation for the observed height of the microwave induced step is presented. This paper also gives the sufficient condition for the empirical formula of a superconduc-ting bridge, and the dependence of Josephson current density on bridge length is discussed.