Single electron pumping in InAs nanowire double quantum dots

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Abstract

Closely spaced local gate electrodes are used to electrically define a double quantum dot along an InAs nanowire crystal. By applying a periodic pulse sequence to two plunger gate electrodes controlling the double quantum dot charge configuration, the device is operated as a single electron pump. The authors find that within measurement accuracy, the pumping current equals one electron per cycle for frequencies up to 2 MHz, demonstrating the suitability of nanowire based quantum dots for pumping applications.

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Subject classification (UKÄ) – MANDATORY

  • Condensed Matter Physics
Original languageEnglish
Pages (from-to)052109-1-052109-3
JournalApplied Physics Letters
Volume91
Issue number5
Publication statusPublished - 2007
Publication categoryResearch
Peer-reviewedYes