Depinning and dynamics of ac driven vortex lattices in random media
| Autor: | G. Pasquini, Victoria Bekeris, D. Pérez Daroca, Gustavo S. Lozano |
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| Jazyk: | angličtina |
| Rok vydání: | 2010 |
| Předmět: |
Physics
Condensed matter physics Ciencias Físicas Condensed Matter - Superconductivity FOS: Physical sciences Random media Observable purl.org/becyt/ford/1.3 [https] Ac dynamics Condensed Matter Physics Electronic Optical and Magnetic Materials Vortex Astronomía Superconductivity (cond-mat.supr-con) purl.org/becyt/ford/1 [https] Amplitude Quadratic equation Lattice (order) Pinning force CIENCIAS NATURALES Y EXACTAS Vortex systems Depinning |
| Zdroj: | CONICET Digital (CONICET) Consejo Nacional de Investigaciones Científicas y Técnicas instacron:CONICET |
| DOI: | 10.1103/PhysRevB.81.184520 |
| Popis: | We study the different dynamical regimes of a vortex lattice driven by AC forces in the presence of random pinning via numerical simulations. The behaviour of the different observables is charaterized as a function of the applied force amplitude for different frequencies. We discuss the inconveniences of using the mean velocity to identify the depinnig transition and we show that instead, the mean quadratic displacement of the lattice is the relevant magnitude to characterize different AC regimes. We discuss how the results depend on the initial configuration and we identify new hysteretic effects which are absent in the DC driven systems. 6 pages, 4 figures |
| Databáze: | OpenAIRE |
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