The dynamics of high-frequency DC RSQUID oscillators

Pegrum, C.M. (2009) The dynamics of high-frequency DC RSQUID oscillators. Superconductor Science and Technology, 22 (6). 064004. ISSN 0953-2048 (http://dx.doi.org/10.1088/0953-2048/22/6/064004)

Full text not available in this repository.Request a copy

Abstract

Josephson circuit simulation software has been used to study the properties of a range of two-junction DC RSQUIDs configured as current-controlled heterodyne oscillators. We find that, if the loop inductance is small, their current-voltage curves are modified substantially due to self-induced Shapiro steps. When the heterodyne frequency is comparable with the Josephson frequency of the junctions the step amplitude becomes very large and additional features are seen, including sub-harmonic steps and step tails. We point out that conventional DC RSQUIDs generally have too large a loop inductance for some of these effects to be seen in the I-V curves, and we suggest that nanofabrication techniques could be used to make novel low-inductance RSQUIDs. We have also demonstrated that by applying a sinusoidally varying RF flux to a DC RSQUID it is possible to phase-modulate the heterodyne oscillation, which could have useful practical applications.

  • Item type:Article
    ID code:19138
    Dates:
    Date
    Event
    June 2009
    Published
    Subjects:Science > Physics
    Department:Faculty of Science > Physics
    Depositing user: Strathprints Administrator
    Date deposited:20 May 2010 19:50
    Last modified:11 Nov 2024 09:26
    URI:https://strathprints.strath.ac.uk/id/eprint/19138
CORE (COnnecting REpositories)