Open AccessTHE CURRENT STEPS IN SUPERCONDUCTING WEAKLINKS
Author(s) -
X.X. Yao
Publication year - 1979
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.28.416
Subject(s) - current (fluid) , superconductivity , constant current , josephson effect , physics , voltage , current source , constant (computer programming) , field (mathematics) , voltage source , radiation , computational physics , condensed matter physics , optics , computer science , quantum mechanics , mathematics , thermodynamics , pure mathematics , programming language
In the presence of a battery source and a radiation field, a superconducting weaklink can be represented by a simplified model consisting of a resistance shunted Josephson junction driven by a constant current source. Using such a model, we give a general criterion for the occuring of constant voltage current steps in the current-voltage characteristics of the weaklink. Following this criterion, we have also discussed the absence of sub-harmonic current steps. For the case while the radiation field is very weak, the current step heights are calculated by pertubation method. The current step heights are also obtained by numerical compution for the case of strong field.