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Current reversal in collective ratchets induced by lattice instability

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Dinis Vizcaíno, Luis Ignacio and González Herrera, Elvira María and Anguita, J. V. and Parrondo, J. M. R. and Vicent López, José Luis (2007) Current reversal in collective ratchets induced by lattice instability. Physical review B, 76 (21). ISSN 1098-0121

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Official URL: http://dx.doi.org/10.1103/PhysRevB.76.212507


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Abstract

A collective mechanism for current reversal in superconducting vortex ratchets is proposed. The mechanism is based on a two-dimensional instability of the ground state (T=0) of the system. We illustrate our results with numerical simulations and experiments in Nb superconducting films fabricated on top of Si substrates with artificially induced asymmetric pinning centers.


Item Type:Article
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©2007 The American Physical Society.
We acknowledge support by Spanish Ministerio de Educación y Ciencia NAN04- 09087, FIS05-07392, MAT05- 23924E, MOSAICO, CAM S-0505/ESP/0337, and UCMSantander. Computer simulations were performed at “Cluster de cálculo para Técnicas Físicas” of UCM, funded in part by the UE-FEDER program and in part by UCM and in the “Aula Sun Microsystems” at UCM.

Uncontrolled Keywords:Superconducting Films; Brownian Motors; Molecular Motors; Regular Array; Magnetic Dots; Vortex; Motion
Subjects:Sciences > Physics > Materials
Sciences > Physics > Solid state physics
Sciences > Physics > Nuclear physics
ID Code:43215
Deposited On:21 Jun 2017 16:35
Last Modified:10 Dec 2018 14:58

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