Dinis Vizcaíno, Luis IgnacioGonzález Herrera, Elvira MaríaAnguita, J. V.Rodríguez Parrondo, Juan ManuelVicent López, José Luis2023-06-202023-06-202007-121098-012110.1103/PhysRevB.76.212507https://hdl.handle.net/20.500.14352/52060©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.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.engjournal articlehttp://dx.doi.org/10.1103/PhysRevB.76.212507https://journals.aps.orgopen access538.9539.1Superconducting FilmsBrownian MotorsMolecular MotorsRegular ArrayMagnetic DotsVortexMotionFísica de materialesFísica del estado sólidoFísica nuclear2211 Física del Estado Sólido2207 Física Atómica y Nuclear