Pegrum, C.M. (2009) The dynamics of high-frequency DC RSQUID oscillators. Superconductor Science and Technology, 22 (6). 064004. ISSN 0953-2048
Full text not available in this repository. (Request a copy from the Strathclyde author)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 |
| Keywords: | superconducting quantum interference devices, SQUIDs, superconducting logic elements, memory devices, microelectronic circuits, Josephson devices, Oscillators, pulse generators, function generators, Physics |
| Subjects: | Science > Physics |
| Department: | Faculty of Science > Physics |
| Related URLs: | |
| Depositing user: | Strathprints Administrator |
| Date Deposited: | 20 May 2010 20:50 |
| Last modified: | 12 Mar 2012 11:12 |
| URI: | http://strathprints.strath.ac.uk/id/eprint/19138 |
Actions (login required)
| View Item |