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

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dc.contributor.authorRossi, A.
dc.contributor.authorTanttu, T.
dc.contributor.authorTan, K.
dc.contributor.authorIisakka, I.
dc.contributor.authorZhao, R.
dc.contributor.authorChan, K.
dc.contributor.authorTettamanzi, G.
dc.contributor.authorRogge, S.
dc.contributor.authorDzurak, A.
dc.contributor.authorMöttönen, M.
dc.date.issued2014
dc.description.abstractNanoscale 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.
dc.description.statementofresponsibilityAlessandro Rossi, Tuomo Tanttu, Kuan Yen Tan, Ilkka Iisakka, Ruichen Zhao, Kok Wai Chan, Giuseppe C. Tettamanzi, Sven Rogge, Andrew S. Dzurak, and Mikko Möttönen
dc.identifier.citationNano Letters, 2014; 14(6):3405-3411
dc.identifier.doi10.1021/nl500927q
dc.identifier.issn1530-6984
dc.identifier.issn1530-6992
dc.identifier.orcidTettamanzi, G. [0000-0002-3209-0632]
dc.identifier.urihttp://hdl.handle.net/2440/104342
dc.language.isoen
dc.publisherAmerican Chemical Society
dc.relation.granthttp://purl.org/au-research/grants/arc/DP120104710
dc.relation.granthttp://purl.org/au-research/grants/arc/DE120100702
dc.relation.granthttp://purl.org/au-research/grants/arc/FT100100589
dc.rights© 2014 American Chemical Society
dc.source.urihttps://doi.org/10.1021/nl500927q
dc.subjectNanoelectronics; silicon; quantum dot; single-electron pump; electrical current standard; metrology
dc.titleAn accurate single-electron pump based on a highly tunable silicon quantum dot
dc.typeJournal article
pubs.publication-statusPublished

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