Charge Transport Transitions and Scaling in Disordered Arrays of Metallic Dots

Details Charge Transport Transitions and Scaling in Disordered Arrays of Metallic Dots Charge Transport Transitions and Scaling in Disordered Arrays of Metallic Dots

2002-05-25

arxiv.org/abs/cond-mat/0205532v1

Phys. Rev. Lett. 90, 046802 (2003)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

4 pages, 4 postscript figures

Scientific paper

10.1103/PhysRevLett.90.046802

We examine the charge transport through disordered arrays of metallic dots using numerical simulations. We find power law scaling in the current-voltage curves for arrays containing no voids, while for void-filled arrays charge bottlenecks form and a single scaling is absent, in agreement with recent experiments. In the void-free case we also show that the scaling exponent depends on the effective dimensionality of the system. For increasing applied drives we find a transition from 2D disordered filamentary flow near threshold to a 1D smectic flow which can be identified experimentally using characteristics in the transport curves and conduction noise.

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