S. Brazovskii, P. Monceau and N. Kirova
J. Phys. IV France 131 (2005) 101-106
Onset of motion and glassy dynamics of a moving vortex latticeG. Li1, E.Y. Andrei1, X. Du1, Z.L. Xiao2, P. Shuk3 and M. Greenblatt3
1 Department of Physics and Astronomy, Rutgers University, Piscataway, NJ 08855, USA
2 Department of Physics, Northern Illinois University, DeKalb, Illinois 60115, USA
3 Department of Chemistry, Rutgers University, Piscataway, NJ 08855, USA
We study the onset of motion of a vortex lattice in response to a driving current that is turned on suddenly. For sufficiently high currents we find that the average vortex velocity (obtained from the longitudinal voltage drop) grows smoothly with time and obeys a stretched exponential with an exponent . The response is governed by two time scales: a delay time (t0) before the appearance of a measurable voltage drop, and a rise time () characterizing the evolution of voltage response. Both time scales increase with decreasing saturation voltage V0 : decreases exponentially, while t0 as a power law. When the saturation velocity is too low the response slows down significantly and shows a step structure indicating plastic response.
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