Europhys. Lett.
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
Europhys. Lett., 73 (6), pp. 955-961 (2006)
DOI: 10.1209/epl/i2005-10470-x

On the origin of high smectic fluidity of the vortex lattice in a 2D superconductor

V. Zhuravlev and T. Maniv

Chemistry Department, Technion-Israel Institute of Technology - Haifa 32000, Israel

received 16 November 2005; accepted in final form 16 January 2006
published online 27 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.

74.25.Qt - Vortex lattices, flux pinning, flux creep.
74.40.+k - Fluctuations (noise, chaos, nonequilibrium superconductivity, localization, etc.).

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