Four-terminal magnetoresistance of a two-dimensional electron-gas constriction in the ballistic regime
- 15 May 1988
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review B
- Vol. 37 (14), 8534-8536
- https://doi.org/10.1103/physrevb.37.8534
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.Keywords
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