Controlling Josephson dynamics by strong microwave fields

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Chesca, B. and Savel'ev, E. and Rakhmanov, A.L. and Smilde, H.J.H. and Hilgenkamp, H. (2008) Controlling Josephson dynamics by strong microwave fields. Physical Review B: Condensed matter and materials physics, 78 (9). 094505. ISSN 1098-0121

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Abstract:We observe several sharp changes in the slope of the current-voltage characteristics (CVCs) of thin-film ramp-edge Josephson junctions between YBa2Cu3O7−delta and Nb when applying strong microwave fields. Such behavior indicates an intriguing Josephson dynamics associated with the switching from a parametric excitation regime induced by the magnetic field of the microwave via oscillations of the Josephson critical current to an ac-current-excitation regime triggered by the electric field of the microwave. We propose a model, which describes the observed features on the CVC in terms of microwave-induced multiple switching between running and locked solutions of sine-Gordon equation.
Item Type:Article
Copyright:© 2008 American Physical Society
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Science and Technology (TNW)
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Link to this item:http://purl.utwente.nl/publications/59954
Official URL:http://dx.doi.org/10.1103/PhysRevB.78.094505
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