Bidirectional counting of single electrons

Toshimasa Fujisawa, Toshiaki Hayashi, Ritsuya Tomita, Yoshiro Hirayama

Research output: Contribution to journalArticlepeer-review

316 Citations (Scopus)


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.

Original languageEnglish
Pages (from-to)1634-1636
Number of pages3
Issue number5780
Publication statusPublished - 2006 Jun 16


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