Voltage locking and other interactions in coupled superconducting weak links. II. Experiment
- 1 January 1980
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review B
- Vol. 21 (1), 125-131
- https://doi.org/10.1103/physrevb.21.125
Abstract
Experiments have been performed on two superconducting indium microbridges fabricated in close proximity (≃ 2 μm) to one another. The observed interactions include the following: (i) the apparent critical current of one bridge depends upon the current and voltage across the other bridge; (ii) gross modifications of the current-voltage characteristics of one bridge occur which are dependent on the current and voltage across the neighboring bridge; and (iii) strong voltage pulling is observed whenever the two bridge voltages are approximately equal, resulting in dc-voltage locking under appropriate conditions. The "voltage-locking" interaction is of particular interest, and data are presented showing its observed temperature and frequency dependence. It is shown that the observed interactions are in qualitative agreement with a model based upon the diffusion of quasiparticles generated during the phase-slip process.Keywords
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