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

Abstract

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
Volume63
Issue number1-3
DOIs
StatePublished - Aug 1 2002

Keywords

  • Nanostructures
  • Quantum dots
  • Semiconductors
  • Transport

ASJC Scopus subject areas

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

Fingerprint Dive into the research topics of 'Nonlinear transport in quantum point contact structures'. Together they form a unique fingerprint.

  • Cite this