An accurate single-electron pump based on a highly tunable silicon quantum dot

Alessandro Rossi, Tuomo Tanttu, Kuan Yen Tan, Ilkka Iisakka, Ruichen Zhao, Kok Wai Chan, Giuseppe C. Tettamanzi, Sven Rogge, Andrew S. Dzurak, Mikko Möttönen

Research output: Contribution to journalArticle

45 Citations (Scopus)

Abstract

Nanoscale single-electron pumps can be used to generate accurate currents, and can potentially serve to realize a new standard of electrical current based on elementary charge. Here, we use a silicon-based quantum dot with tunable tunnel barriers as an accurate source of quantized current. The charge transfer accuracy of our pump can be dramatically enhanced by controlling the electrostatic confinement of the dot using purposely engineered gate electrodes. Improvements in the operational robustness, as well as suppression of nonadiabatic transitions that reduce pumping accuracy, are achieved via small adjustments of the gate voltages. We can produce an output current in excess of 80 pA with experimentally determined relative uncertainty below 50 parts per million.

Original languageEnglish
Pages (from-to)3405-3411
Number of pages7
JournalNano Letters
Volume14
Issue number6
Early online date13 May 2014
DOIs
Publication statusPublished - 11 Jun 2014

Fingerprint

Silicon
Semiconductor quantum dots
quantum dots
Pumps
pumps
Electrons
silicon
Charge transfer
Electrostatics
Tunnels
electrons
Electrodes
Electric potential
tunnels
pumping
adjusting
charge transfer
retarding
electrostatics
electrodes

Keywords

  • electrical current standard
  • metrology
  • nanoelectronics
  • quantum dot
  • silicon
  • single-electron pump

Cite this

Rossi, A., Tanttu, T., Tan, K. Y., Iisakka, I., Zhao, R., Chan, K. W., ... Möttönen, M. (2014). An accurate single-electron pump based on a highly tunable silicon quantum dot. Nano Letters, 14(6), 3405-3411. https://doi.org/10.1021/nl500927q
Rossi, Alessandro ; Tanttu, Tuomo ; Tan, Kuan Yen ; Iisakka, Ilkka ; Zhao, Ruichen ; Chan, Kok Wai ; Tettamanzi, Giuseppe C. ; Rogge, Sven ; Dzurak, Andrew S. ; Möttönen, Mikko. / An accurate single-electron pump based on a highly tunable silicon quantum dot. In: Nano Letters. 2014 ; Vol. 14, No. 6. pp. 3405-3411.
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Rossi, A, Tanttu, T, Tan, KY, Iisakka, I, Zhao, R, Chan, KW, Tettamanzi, GC, Rogge, S, Dzurak, AS & Möttönen, M 2014, 'An accurate single-electron pump based on a highly tunable silicon quantum dot', Nano Letters, vol. 14, no. 6, pp. 3405-3411. https://doi.org/10.1021/nl500927q

An accurate single-electron pump based on a highly tunable silicon quantum dot. / Rossi, Alessandro; Tanttu, Tuomo; Tan, Kuan Yen; Iisakka, Ilkka; Zhao, Ruichen; Chan, Kok Wai; Tettamanzi, Giuseppe C.; Rogge, Sven; Dzurak, Andrew S.; Möttönen, Mikko.

In: Nano Letters, Vol. 14, No. 6, 11.06.2014, p. 3405-3411.

Research output: Contribution to journalArticle

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Rossi A, Tanttu T, Tan KY, Iisakka I, Zhao R, Chan KW et al. An accurate single-electron pump based on a highly tunable silicon quantum dot. Nano Letters. 2014 Jun 11;14(6):3405-3411. https://doi.org/10.1021/nl500927q