| Numéro |
J. Phys. IV France
Volume 09, Numéro PR10, December 1999
International Workshop on Electronic CrystalsECRYS-99 |
|
|---|---|---|
| Page(s) | Pr10-113 - Pr10-115 | |
| DOI | https://doi.org/10.1051/jp4:19991029 | |
ECRYS-99
J. Phys. IV France 09 (1999) Pr10-113-Pr10-115
DOI: 10.1051/jp4:19991029
Commensurate-incommensurate transitions in ordered and disordered vortex flow channels
R. Besseling1, T. Dröse2, R. Niggebrugge1 and P.H. Kes11 Kamerlingh Onnes Laboratorium, Leiden University, P.O. Box 9504, 2300 RA Leiden, The Netherlands
2 I. Institut für Theoretische Physik, Universität Hamburg, Jungiusstrasse 9, 20355 Hamburg, Germany
Abstract
A numerical and analytical study of vortex flow behavior in weak pinning channels has revealed that, for a
channel in a perfect lattice, incommensurability between channel width and the vortex lattice constant causes (point)
defects in the channel with a nearly vanishing barrier Jc. The transport characteristics exhibit a crossover from low
mobility (defect motion) to full flux flow (coherent motion). Jc versus commensurability parameter is a discontinuous
function with sharp peaks at integer values. Disorder in the channel edges smears the sharp C-I transitions due to
defect pinning at Incommensurability. Also it lowers the Commensurate Jc due to defect generation. These
observations agree with experiments we perfomed on weak pinning vortex channels in strong pinning films.
© EDP Sciences 1999