Volume 73, Number 6, March 2006
|Page(s)||955 - 961|
|Section||Condensed matter: electronic structure, electrical, magnetic, and optical properties|
|Published online||27 January 2006|
On the origin of high smectic fluidity of the vortex lattice in a 2D superconductor
Chemistry Department, Technion-Israel Institute of Technology - Haifa 32000, Israel
Accepted: 16 January 2006
We study the response of the vortex lattice in a strongly type-II 2D superconductor to quasi-static sweeping magnetic induction using the Ginzburg-Landau approach in the lowest Landau level approximation. It is found that, due to small size and relative softness of the vortex core as compared to the atomic core of a typical crystal potential, the vortices tend to flow in independently moving channels with smectic structure. A model for calculating the friction coefficient of moving vortices in the presence of a few pinning centers under conditions of minimal power dissipation is presented.
PACS: 74.25.Qt – Vortex lattices, flux pinning, flux creep / 74.40.+k – Fluctuations (noise, chaos, nonequilibrium superconductivity, localization, etc.)
© EDP Sciences, 2006
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