Abstract
A novel negative magnetoresistance effect is found in four-terminal measurements of the voltage drop across a short constriction of variable width in a high-mobility two-dimensional electron gas. The effect is interpreted as the suppression by a magnetic field of the geometrical constriction resistance in the ballistic regime. Quantitative agreement with a simple model based on a Landauer-type formula is obtained.
Original language | English (US) |
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Pages (from-to) | 8534-8536 |
Number of pages | 3 |
Journal | Physical Review B |
Volume | 37 |
Issue number | 14 |
DOIs | |
State | Published - 1988 |
Externally published | Yes |
ASJC Scopus subject areas
- Condensed Matter Physics