Nonlocal vortex motion in mesoscopic amorphous Nb0.7Ge0.3 structures

Details Nonlocal vortex motion in mesoscopic amorphous Nb0.7Ge0.3 structures Nonlocal vortex motion in mesoscopic amorphous Nb0.7Ge0.3 structures

2006-06-16

arxiv.org/abs/cond-mat/0606449v1

Physics

Condensed Matter

Superconductivity

4 pages, 3 figures

Scientific paper

10.1103/PhysRevB.74.220510

We study nonlocal vortex transport in mesoscopic amorphous Nb0.7Ge0.3 samples. A dc current I is passed through a wire connected via a perpendicular channel, of a length L= 2-5 um, with a pair of voltage probes where a nonlocal response Vnl ~ I is measured. The maximum of Rnl=Vnl/I for a given temperature occurs at an L-independent magnetic field and is proportional to 1/L. The results are interpreted in terms of the dissipative vortex motion along the channel driven by a remote current, and can be understood in terms of a simple model.

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