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Imaging a one-electron InAs quantum dot in an InAs/InP nanowire

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Author

  • Ania C. Bleszynski-Jayich
  • Linus Fröberg
  • Mikael Björk
  • H. J. Trodahl
  • Lars Samuelson
  • R. M. Westervelt

Summary, in English

Nanowire heterostructures define high-quality few-electron quantum dots for nanoelectronics, spintronics, and quantum information processing. We use a cooled scanning probe microscope (SPM) to image and control an InAs quantum dot in an InAs/InP nanowire using the tip as a movable gate. Images of dot conductance vs tip position at T=4.2 K show concentric rings as electrons are added, starting with the first electron. The SPM can locate a dot along a nanowire and individually tune its charge, abilities that will be very useful for the control of coupled nanowire dots.

Publishing year

2008

Language

English

Publication/Series

Physical Review B (Condensed Matter and Materials Physics)

Volume

77

Issue

24

Document type

Journal article

Publisher

American Physical Society

Topic

  • Condensed Matter Physics

Status

Published

ISBN/ISSN/Other

  • ISSN: 1098-0121