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arXiv · cond-mat/9904141

Flow Induced Organization and Memory of a Vortex Lattice

Z. L. Xiao·E. Y. Andrei·M. J. Higgins
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Abstract

We report on experiments probing the evolution of a vortex state in response to a driving current in 2H-NbSe$_2$ crystals. By following the vortex motion with fast transport measurements we find that the current enables the system to reorganize and access new configurations. During this process the system exhibits a long-term memory: if the current is turned off the vortices freeze in place remembering their prior motion. When the current is restored the motion resumes where it stopped. The experiments provide evidence for a dynamically driven structural change of the vortex lattice and a corresponding dynamic phase diagram that contains a previously unknown regime where the critical current can be either $increased$ or $decreased$ by applying an appropriate driving current.

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Z. L. Xiao, E. Y. Andrei, M. J. Higgins. 1999-04-10. Flow Induced Organization and Memory of a Vortex Lattice. https://doi.org/10.1103/physrevlett.83.1664

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