Experimental realization of a relativistic fluxon ratchet

Details Experimental realization of a relativistic fluxon ratchet Experimental realization of a relativistic fluxon ratchet

2001-12-27

arxiv.org/abs/cond-mat/0112467v1

Physics

Condensed Matter

Superconductivity

4 pages, 6 figures. To appear in PHYSICA C

Scientific paper

10.1016/S0921-4534(02)01232-7

We report the observation of the ratchet effect for a relativistic flux quantum trapped in an annular Josephson junction embedded in an inhomogeneous magnetic field. In such a solid state system mechanical quantities are proportional to electrical quantities, so that the ratchet effect represents the realization of a relativistic-flux-quantum-based diode. Mean static voltage response, equivalent to directed fluxon motion, is experimentally demonstrated in such a diode for deterministic current forcing both in the overdamped and in the underdamped dynamical regime. In the underdamped regime, the recently predicted phenomenon of current reversal is also recovered in our fluxon ratchet.

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