High efficiency deterministic Josephson Vortex Ratchet

Details High efficiency deterministic Josephson Vortex Ratchet High efficiency deterministic Josephson Vortex Ratchet

2005-06-29

arxiv.org/abs/cond-mat/0506754v1

Phys. Rev. Lett. 95, 090603 (2005)

Physics

Condensed Matter

Superconductivity

accepted by PRL. To see status click on http://134.2.74.170:88/cnt/cond-mat_0506754.html

Scientific paper

10.1103/PhysRevLett.95.090603

We investigate experimentally a Josephson vortex ratchet -- a fluxon in an asymmetric periodic potential driven by a deterministic force with zero time average. The highly asymmetric periodic potential is created in an underdamped annular long Josephson junction by means of a current injector providing efficiency of the device up to 91%. We measured the ratchet effect for driving forces with different spectral content. For monochromatic high-frequency drive the rectified voltage becomes quantized. At high driving frequencies we also observe chaos, sub-harmonic dynamics and voltage reversal due to the inertial mass of a fluxon.

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