Multiple Cotunneling in Large Quantum Dot Arrays

Details Multiple Cotunneling in Large Quantum Dot Arrays Multiple Cotunneling in Large Quantum Dot Arrays

2005-05-05

arxiv.org/abs/cond-mat/0505143v2

Phys. Rev. Lett. 95, 076806 (2005)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

9 pages, 2 figures

Scientific paper

10.1103/PhysRevLett.95.076806

We investigate the effects of inelastic cotunneling on the electronic transport properties of gold nanoparticle multilayers and thick films at low applied bias, inside the Coulomb blockade regime. We find that the zero-bias conductance, $g_0(T)$, in all systems exhibits Efros-Shklovskii-type variable range hopping transport. The resulting typical hopping distance, corresponding to the number of tunnel junctions participating in cotunneling events, is shown to be directly related to the power law exponent in the measured current-voltage characteristics. We discuss the implications of these findings in light of models on cotunneling and hopping transport in mesoscopic, granular conductors.

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