| Numéro |
J. Phys. IV France
Volume 131, December 2005
|
|
|---|---|---|
| Page(s) | 101 - 106 | |
| DOI | https://doi.org/10.1051/jp4:2005131022 | |
| Publié en ligne | 18 janvier 2006 | |
S. Brazovskii, P. Monceau and N. Kirova
J. Phys. IV France 131 (2005) 101-106
DOI: 10.1051/jp4:2005131022
Onset of motion and glassy dynamics of a moving vortex lattice
G. Li1, E.Y. Andrei1, X. Du1, Z.L. Xiao2, P. Shuk3 and M. Greenblatt31 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
Abstract
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.
© EDP Sciences 2005