Four-terminal magnetoresistance of a two-dimensional electron-gas constriction in the ballistic regime

H. Van Houten, C. W.J. Beenakker, P. H.M. Van Loosdrecht, T. J. Thornton, H. Ahmed, M. Pepper, C. T. Foxon, J. J. Harris

Research output: Contribution to journalArticle

112 Scopus citations

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 languageEnglish (US)
Pages (from-to)8534-8536
Number of pages3
JournalPhysical Review B
Volume37
Issue number14
DOIs
StatePublished - 1988

ASJC Scopus subject areas

  • Condensed Matter Physics

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    Van Houten, H., Beenakker, C. W. J., Van Loosdrecht, P. H. M., Thornton, T. J., Ahmed, H., Pepper, M., Foxon, C. T., & Harris, J. J. (1988). Four-terminal magnetoresistance of a two-dimensional electron-gas constriction in the ballistic regime. Physical Review B, 37(14), 8534-8536. https://doi.org/10.1103/PhysRevB.37.8534