IFIBA   22255
INSTITUTO DE FISICA DE BUENOS AIRES
Unidad Ejecutora - UE
artículos
Título:
Depinning and dynamics of ac driven vortex lattices in random media
Autor/es:
D. PÉREZ DAROCA, G. S. LOZANO, G. PASQUINI, AND V. BEKERIS
Revista:
PHYSICAL REVIEW B - SOLID STATE
Editorial:
Am. Phys. Soc
Referencias:
Lugar: Nueva York; Año: 2010 vol. 81 p. 1845201 - 1845206
ISSN:
0556-2805
Resumen:
We study the different dynamical regimes of a vortex lattice driven by ac forces in the presence of random
pinning via numerical simulations. The behavior of the different observables is characterized as a function of
the applied force amplitude for different frequencies. We discuss the inconveniences of using the mean velocity
to identify the depinning 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 hysteretic effects which are absent in the dc driven systems.