Daniel Dominguez

HALL NOISE AND TRANSVERSE FREEZING IN DRIVEN VORTEX LATTICES

We study driven vortex lattices in superconducting thin films. Above the critical force F{sub c} we find two dynamical phase transitions at F{sub p} and F{sub t} , which could be observed in simultaneous noise measurements of the longitudinal and Hall voltage. At F{sub p} there is a transition from plastic flow to smectic flow, where the voltage noise is isotropic (Hall noise = longitudinal noise) and there is a peak in the differential resistance. At F{sub t} there is a sharp transition to a frozen transverse solid, where the Hall noise falls abruptly and vortex motion is localized in the transverse direction. {copyright} {ital 1999} {ital The American Physical Society}

Mode locking in ac-driven vortex lattices with random pinning.

We find mode-locking steps in simulated current-voltage characteristics of ac-driven vortex lattices with random pinning. For low frequencies there is mode locking above a finite ac force amplitude, while for large frequencies there is mode locking for any small ac force. This is correlated with the nature of temporal order in the different regimes in the absence of ac drive. The mode-locked state is a frozen solid pinned in the moving reference of frame, and the depinning from the step shows plastic flow and hysteresis.

Dynamic Transition in Vortex Flow in Strongly Disordered Josephson Junction Arrays and Superconducting Thin Films

We study the dynamics of vortices in strongly disordered

Effective temperature in driven vortex lattices with random pinning.

d=2

Melting and transverse depinning of driven vortex lattices in the periodic pinning of Josephson junction arrays

Josephson junction arrays and superconducting films driven by a current. We find a dynamic phase transition in vortex flow at a current

TRANSVERSE DEPINNING AND MELTING OF A MOVING VORTEX LATTICE IN DRIVEN PERIODIC JOSEPHSON JUNCTION ARRAYS

I_p>I_c

Nonequilibrium Transitions in Fully Frustrated Josephson Junction Arrays

. Below

First-Order Melting of a Moving Vortex Lattice: Effects of Disorder

I_p

Langevin simulations of the out-of-equilibrium dynamics of vortex glasses in high-temperature superconductors

there is plastic flow characterized by an average-velocity correlation length scale

Surface barrier in mesoscopic type-I and type-II superconductors

\xi_v