Nonlinear transport in quantum point contact structures

A. E. Krishnaswamy, Stephen Goodnick, M. N. Wybourne, C. Berven

Research output: Contribution to journalArticle

1 Scopus citations


We have investigated the magnetotransport properties under nonlinear conditions in quantum point contact structures fabricated on high mobility AlGaAs/GaAs two-dimensional electron gas (2DEG) layers. Nonlinearities in the I-V characteristics are observed at the threshold for conduction when biased initially from the tunneling regime as observed previously. We observe that this non-ideality is enhanced by a magnetic field normal to the plane of the 2DEG. This behavior is interpreted in terms of corrections to the Landauer model extended to nonequilibrium conditions.

Original languageEnglish (US)
Pages (from-to)123-127
Number of pages5
JournalMicroelectronic Engineering
Issue number1-3
Publication statusPublished - Aug 2002



  • Nanostructures
  • Quantum dots
  • Semiconductors
  • Transport

ASJC Scopus subject areas

  • Hardware and Architecture
  • Electrical and Electronic Engineering
  • Electronic, Optical and Magnetic Materials
  • Surfaces, Coatings and Films
  • Atomic and Molecular Physics, and Optics

Cite this