Strong Pinning and Plastic Deformations of the Vortex Lattice

Details Strong Pinning and Plastic Deformations of the Vortex Lattice Strong Pinning and Plastic Deformations of the Vortex Lattice

1996-07-26

arxiv.org/abs/supr-con/9607006v1

Physics

Condensed Matter

Superconductivity

12 pages, TeX type, Postscript figures

Scientific paper

10.1103/PhysRevLett.77.4636

We investigate numerically the dynamically generated plastic deformations of a 3D vortex lattice (VL) driven through a disorder potential with isolated, strong pinning centers (point-like or extended along the field direction). We find that the VL exhibits a very peculiar dynamical behavior in the plastic flow regime, in particular, topological excitations consisting of three or four entangled vortices are formed. We determine the critical current density $j_c$ and the activation energy for depinning $U_c$ in the presence of a finite density of strong pinning centers.

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