Subharmonic steps and chaotic behavior in rf-biased Josephson junctions

Taking advantage of the software PSpice, we simulated the I– V characteristics of the RCSJ model of Josephson junctions under the radiation of microwave. Integers as well as subharmonic constant-voltage steps are observed, and the dependence of step height on radio frequency (rf) current amplitude w...

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Bibliographic Details
Published in:Physica. C, Superconductivity Superconductivity, 2008-02, Vol.468 (3), p.214-217
Main Authors: Hu, Ya-Ting, Zhou, Tie-Ge, Yan, Shao-Lin, Fang, Lan, Gu, Jin, Zhao, Xin-Jie
Format: Article
Language:English
Subjects:
Amplitudes
Chaos
Chaos theory
Condensed matter: electronic structure, electrical, magnetic, and optical properties
Electric potential
Exact sciences and technology
Josephson junction
Josephson junctions
Microwaves
Physics
Proximity effects, weak links, tunneling phenomena, and josephson effects, adreev effect, sn and sns junctions
Pspice
Subharmonic
Superconductivity
Voltage
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Summary:Taking advantage of the software PSpice, we simulated the I– V characteristics of the RCSJ model of Josephson junctions under the radiation of microwave. Integers as well as subharmonic constant-voltage steps are observed, and the dependence of step height on radio frequency (rf) current amplitude was obtained here. Furthermore, we found that the rf-biased junction systems exhibited chaotic behavior at the low rf current amplitude even if the drive frequency is much greater than the plasma frequency of the junction, which affected the subharmonic phase-locking. The results are valuable for the research and application of Josephson junction in voltage standard and microwave detection.
ISSN:0921-4534
1873-2143
DOI:10.1016/j.physc.2007.11.015