| Autor: |
Lindelof, P. E., Hansen, J. Bindslev |
| Zdroj: |
Journal of Low Temperature Physics; December 1977, Vol. 29 Issue: 5-6 p369-396, 28p |
| Abstrakt: |
Two superconducting thin-film microbridges (Dayem bridges) fabricated in the same tin or indium film and situated only a few micrometers apart can have their Josephson frequencies locked to each other when their dc voltages are approximately matched (independent of their relative sign). We have in a number of cases studied the results of such an interaction in the current-voltage characteristics and in the total emitted Josephson radiation. The threshold for observing a mutual locking depends on the quality of the Dayem bridges as well as on the distance between the two bridges. For tin we have so far obtained coherent behavior for two Dayem bridges at a distance of up to 12 µm. For indium the corresponding distance was 3.5 µm. A tentative model of the interaction is proposed. This model includes the suggestion of a propagating current/branch imbalance excitation in superconductors. |
| Databáze: |
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| Externí odkaz: |
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