Conductance Suppression due to Correlated Electron Transport in Coupled Double-dots
arXiv:cond-mat/9911173 · doi:10.1103/PhysRevB.60.16906
Abstract
The electrostatic interaction between two capacitively-coupled metal double-dots is studied at low temperatures. Experiments show that when the Coulomb blockade is lifted by applying appropriate gate biases to both double-dots, the conductance through each double-dot becomes significantly lower than when only one double-dot is conducting. A master equation is derived for the system and the results obtained agree well with the experimental data. The model suggests that the conductance lowering in each double-dot is caused by a single-electron tunneling in the other double-dot. Here, each double-dot responds to the instantaneous, rather than average, potentials on the other double-dot. This leads to correlated electron motion within the system, where the position of a single electron in one double-dot controls the tunneling rate through the other double-dot.
19 pages [pre-print style], 8 figures, accepted for Phys. Rev. B
References in corpus (1)
Cited by in corpus (5)
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