| Autor: |
Carapella, G., Costabile, G., Manscher, M., Nordhan, M. |
| Zdroj: |
Journal of Low Temperature Physics; Feb1997, Vol. 106 Issue 3/4, p345-352, 8p |
| Abstrakt: |
We fabricated and tested samples consisting of two long stacked Josephson junctions with direct access to the intermediate electrode, whose thickness is smaller than London penetration depth λ L. The electrodes are patterned so that the junctions can be independently biased in the overlap configuration. We report the observation of fluxon-antifluxon phase-locked states in zero external magnetic field and the measurements concerning the range of stability of such states as a function of the bias currents. There is strong evidence for the existence of fluxon-antifluxon pairs even when one of the two junctions is biased on the McCumber curve. We also report the observation of several mutually phase-locked states induced by large rf signals (but not phase-locked to the rf field), that can be interpreted as fluxon-antifluxon oscillating in the stack. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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