Signatures of band-like tunnelling in granular nanowires

Details Signatures of band-like tunnelling in granular nanowires Signatures of band-like tunnelling in granular nanowires

2005-02-18

arxiv.org/abs/cond-mat/0502439v1

Phys. Rev. B, 72 113411 (2005).

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

4 pages, 3 figures. submitted to the Physcal Review B

Scientific paper

10.1103/PhysRevB.72.113411

We explore the problem of tunneling through disorderd nanowires, comprised of a random distribution of metallic grains, by means of a many-body model that captures the essential physics of the system. The random configuration of grains gives rise to a smooth band-like set of states, which mediates current flow through the nanowire. Analytical and numerical calculations show the characteristic signature of this unusual band-like transport to be a quadratic variation of the current as a function of the applied voltage (i.e. $I\sim V^2$), a variation that is clearly observed in experimental studies of Pt/C composite nanowires.

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