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Current reversal in collective ratchets induced by lattice instability



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Dinis Vizcaíno, Luis Ignacio y González Herrera, Elvira María y Anguita, J. V. y Parrondo, J. M. R. y 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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URL Oficial: http://dx.doi.org/10.1103/PhysRevB.76.212507

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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.

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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.

Palabras clave:Superconducting Films; Brownian Motors; Molecular Motors; Regular Array; Magnetic Dots; Vortex; Motion
Materias:Ciencias > Física > Física de materiales
Ciencias > Física > Física del estado sólido
Ciencias > Física > Física nuclear
Código ID:43215
Depositado:21 Jun 2017 16:35
Última Modificación:10 Dic 2018 14:58

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