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

H. van Houten | Zendy; C. W. J. Beenakker | Zendy; P. H. M. van Loosdrecht | Zendy; T. J. Thornton | Zendy; H. Ahmed | Zendy; M. Pepper | Zendy; C. T. Foxon | Zendy; J. J. Harris | Zendy

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

Author(s) -

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

Publication year - 1988

Publication title -

physical review. b, condensed matter

Language(s) - English

Resource type - Journals

eISSN - 1095-3795

pISSN - 0163-1829

DOI - 10.1103/physrevb.37.8534

Subject(s) - magnetoresistance , ballistic conduction , condensed matter physics , constriction , electron , magnetic field , voltage drop , drop (telecommunication) , fermi gas , materials science , voltage , physics , electrical engineering , quantum mechanics , medicine , engineering , endocrinology

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.

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