Current reversal in collective ratchets induced by lattice instability
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...
| Autores: | , , , , |
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| Tipo de recurso: | artículo |
| Fecha de publicación: | 2007 |
| País: | España |
| Institución: | Universidad Complutense de Madrid (UCM) |
| Repositorio: | Docta Complutense |
| Idioma: | inglés |
| OAI Identifier: | oai:docta.ucm.es:20.500.14352/52060 |
| Acceso en línea: | https://hdl.handle.net/20.500.14352/52060 |
| Access Level: | acceso abierto |
| Palabra clave: | 538.9 539.1 Superconducting Films Brownian Motors Molecular Motors Regular Array Magnetic Dots Vortex Motion Física de materiales Física del estado sólido Física nuclear 2211 Física del Estado Sólido 2207 Física Atómica y Nuclear |
| Sumario: | 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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