A superconducting "dripping faucet"

Details A superconducting "dripping faucet" A superconducting "dripping faucet"

2006-12-08

arxiv.org/abs/cond-mat/0612221v1

Physics

Condensed Matter

Superconductivity

4 pages, 5 figures

Scientific paper

When a current is applied to a type-I superconducting strip containing a narrow channel across its width, magnetic flux spots nucleate at the edge and are then driven along the channel by the current. These flux "drops" are reminiscent of water drops dripping from a faucet, a model system for studying low-dimensional chaos. We use a novel high-bandwidth Hall probe to detect in real time the motion of individual flux spots moving along the channel. Analyzing the time series consisting of the intervals between successive flux drops, we find distinct regions of chaotic behavior characterized by positive Lyapunov exponents, indicating that there is a close analogy between the dynamics of the superconducting and water drop systems.

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