alexa Bidirectional counting of single electrons.
Engineering

Engineering

Journal of Aeronautics & Aerospace Engineering

Author(s): Fujisawa T, Hayashi T, Tomita R, Hirayama Y

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Abstract A bidirectional single-electron counting device is demonstrated. Individual electrons flowing in forward and reverse directions through a double quantum dot are detected with a quantum point contact acting as a charge sensor. A comprehensive statistical analysis in the frequency and time domains and of higher order moments of noise reveals antibunching correlation in single-electron transport through the device itself. The device can also be used to investigate current flow in the attoampere range, which cannot be measured by existing current meters. This article was published in Science and referenced in Journal of Aeronautics & Aerospace Engineering

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