Onset of Vortices in Thin Superconducting Strips and Wires

Abstract

Spontaneous nucleation and the consequent penetration of vortices into thin superconducting films and wires, subjected to a magnetic field, can be considered as a nonlinear stage of primary instability of the current-carrying superconducting state. The development of the instability leads to the formation of a chain of vortices in strips and helicoidal vortex lines in wires. The boundary of instability was obtained analytically. The nonlinear stage was investigated by simulations of the time-dependent generalized Ginzburg-Landau equation.

REVTeX 3.0, 12 pages, 5Postscript figures (uuencoded). Accepted for Phys. Rev. B

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