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 language | English (US) |
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Pages (from-to) | 123-127 |
Number of pages | 5 |
Journal | Microelectronic Engineering |
Volume | 63 |
Issue number | 1-3 |
DOIs | |
State | Published - Aug 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