Remote doping of scalable nanowire branches

Martin Friedl, Kris Cerveny, Chunyi Huang, Didem Dede, Mohammad Samani, Megan O. Hill, Nicholas Morgan, Wonjong Kim, Lucas Güniat, Jaime Segura-Ruiz, Lincoln J. Lauhon, Dominik M. Zumbühl, Anna Fontcuberta I Morral*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

2 Scopus citations


Selective-area epitaxy provides a path toward high crystal quality, scalable, complex nanowire networks. These high-quality networks could be used in topological quantum computing as well as in ultrafast photodetection schemes. Control of the carrier density and mean free path in these devices is key for all of these applications. Factors that affect the mean free path include scattering by surfaces, donors, defects, and impurities. Here, we demonstrate how to reduce donor scattering in InGaAs nanowire networks by adopting a remote-doping strategy. Low-temperature magnetotransport measurements indicate weak anti-localization - a signature of strong spin-orbit interaction - across a nanowire Y-junction. This work serves as a blueprint for achieving remotely doped, ultraclean, and scalable nanowire networks for quantum technologies.

Original languageEnglish (US)
Pages (from-to)3577-3584
Number of pages8
JournalNano letters
Issue number5
StatePublished - May 13 2020


  • Ingaas
  • Nanowires
  • Selective-area epitaxy
  • Spin-orbit interaction
  • Weak anti-localization

ASJC Scopus subject areas

  • Bioengineering
  • Chemistry(all)
  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanical Engineering

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