Dynamical fluctuations in mode locking experiments on vortices moving through mesoscopic channels

Details Dynamical fluctuations in mode locking experiments on vortices moving through mesoscopic channels Dynamical fluctuations in mode locking experiments on vortices moving through mesoscopic channels

2003-08-19

arxiv.org/abs/cond-mat/0308372v1

Physics

Condensed Matter

Superconductivity

2 pages, 2 figures, contribution to M2S-HTSC 2003, Rio

Scientific paper

10.1016/j.physc.2004.03.032

We have studied the flow properties of vortices driven through easy flow mesoscopic channels by means of the mode locking (ML) technique. We observe a ML jump with large voltage broadening in the real part of the rf-impedance. Upon approaching the pure dc flow by reducing the rf amplitude, the ML jump is smeared out via a divergence of the voltage width. This indicates a large spread in internal frequencies and lack of temporal coherence in the dc-driven state.

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