Nonuniform Self-Organized Dynamical States in Superconductors with Periodic Pinning

Details Nonuniform Self-Organized Dynamical States in Superconductors with Periodic Pinning Nonuniform Self-Organized Dynamical States in Superconductors with Periodic Pinning

2006-05-26

arxiv.org/abs/cond-mat/0605661v1

Phys. Rev. Lett. 96, 127004 (2006)

Physics

Condensed Matter

Superconductivity

4 pages, 2 figures

Scientific paper

10.1103/PhysRevLett.96.127004

We consider magnetic flux moving in superconductors with periodic pinning arrays. We show that sample heating by moving vortices produces negative differential resistivity (NDR) of both N and S type (i.e., N- and S-shaped) in the voltage-current characteristic (VI curve). The uniform flux flow state is unstable in the NDR region of the VI curve. Domain structures appear during the NDR part of the VI curve of an N type, while a filamentary instability is observed for the NDR of an S type. The simultaneous existence of the NDR of both types gives rise to the appearance of striking self-organized (both stationary and non-stationary) two-dimensional dynamical structures.

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