Quantum point contact due to Fermi-level pinning and doping profiles in semiconductor nanocolumns

K. M. Indlekofer, M. Goryll, J. Wensorra, M. I. Lepsa

Research output: Contribution to journalArticle

3 Scopus citations


We show that nanoscale doping profiles inside a nanocolumn in combination with Fermi-level pinning at the surface give rise to the formation of a saddle-point in the potential profile. Consequently, the lateral confinement inside the channel varies along the transport direction, yielding an embedded quantum point contact. An analytical estimation of the quantization energies is given.

Original languageEnglish (US)
Pages (from-to)559-562
Number of pages4
JournalApplied Physics A: Materials Science and Processing
Issue number3
StatePublished - Jun 1 2007
Externally publishedYes


ASJC Scopus subject areas

  • Chemistry(all)
  • Materials Science(all)

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