Metastable states of a driven flux lattice in a superconductor with strong pins

Abstract

The flux lattice driven by a uniform driving force in a superconductor with hot, strong, sharp and randomly distributed pinning centers, with applied magnetic field half the matching field is simulated. At low temperature both a non activated regime, where flux motion occurs within a robust percolative flux flow channel, and an activated regime are obtained depending on the sample preparation. These two regimes exhibit distinct resistivity and magnetic induction. In the non activated regime, a clear fingerprint is observed in the autocorrelation function of the longitudinal resitivity, which oscillates at a frequency close to the inverse lattice diffusion time.

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References in corpus (5)

• Nonequilibrium Dynamic Phase Diagram for Vortex Lattices
• Moving glass theory of driven lattices with disorder
• Hall noise and transverse freezing in driven vortex lattices
• Fractal Networks, Braiding Channels, and Voltage Noise in Intermittently Flowing Rivers of Quantized Magnetic Flux
• Efficient Methods for Handling Long-Range Forces in Particle-Particle Simulations