Vortex lattice dynamics in a-NbGe detected by mode-locking experiments

Details Vortex lattice dynamics in a-NbGe detected by mode-locking experiments Vortex lattice dynamics in a-NbGe detected by mode-locking experiments

2003-04-02

arxiv.org/abs/cond-mat/0304046v1

Physics

Condensed Matter

Superconductivity

2 pages, 2 figures. Contribution to M2S-HTSC Rio

Scientific paper

10.1016/j.physc.2004.03.036

We observed mode-locking (ML) of rf-dc driven vortex arrays in a superconducting weak pinning a-NbGe film. The ML voltage shows the expected scaling $V\propto f\sqrt{B}$ with $f$ the rf-frequency and $B$ the magnetic field. For large dc-velocity (corresponding to a large ML frequency), the ML current step width exhibits a squared Bessel function dependence on the rf-amplitude as predicted for ML of a lattice moving elastically through a random potential.

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