Single-electron pumping from a quantum dot into an electrode

Sasaoka, Kenji; Yamamoto, Takahiro; Watanabe, Satoshi
March 2010
Applied Physics Letters;3/8/2010, Vol. 96 Issue 10, p102105
Academic Journal
The transient current dynamics of a quantum capacitor consisting of a quantum dot connected to a single electrode has been theoretically investigated by the nonequilibrium Green’s function method. We have clarified the influence of dot-electrode coupling strength on the transient current behavior of the quantum capacitor. Our simulation reproduces very well the behaviors seen in recent experimental results by Fève et al., [Science 316, 1169 (2007)], such as the increase in maximum value of instantaneous current and the decrease in total amount of electrons pumped from the dot when the dot-electrode coupling increases.


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