Superconducting Fluxon Pumps and Lenses

Details Superconducting Fluxon Pumps and Lenses Superconducting Fluxon Pumps and Lenses

1999-10-29

arxiv.org/abs/cond-mat/9910484v1

Phys. Rev. Lett. 83, 5106 (1999)

Physics

Condensed Matter

Superconductivity

Phys. Rev. Lett. 83, in press (1999); 4 pages, 5 .gif figures; figures also available at http://www-personal.engin.umich.edu/~

Scientific paper

10.1103/PhysRevLett.83.5106

We study stochastic transport of fluxons in superconductors by alternating current (AC) rectification. Our simulated system provides a fluxon pump, "lens", or fluxon "rectifier" because the applied electrical AC is transformed into a net DC motion of fluxons. Thermal fluctuations and the asymmetry of the ratchet channel walls induce this "diode" effect, which can have important applications in devices, like SQUID magnetometers, and for fluxon optics, including convex and concave fluxon lenses. Certain features are unique to this novel two-dimensional (2D) geometric pump, and different from the previously studied 1D ratchets.

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