Quasiclassical Negative Magnetoresistance of a 2D Electron Gas: Interplay of Strong Scatterers and Smooth Disorder

A. D. Mirlin, D. G. Polyakov, F. Evers, and P. Wölfle
Phys. Rev. Lett. 87, 126805 – Published 4 September 2001
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Abstract

We study the quasiclassical magnetotransport of noninteracting fermions in two dimensions moving in a random array of strong scatterers (antidots, impurities, or defects) on the background of a smooth random potential. We demonstrate that the combination of the two types of disorder induces a novel mechanism leading to a strong negative magnetoresistance, followed by the saturation of the magnetoresistivity ρxx(B) at a value determined solely by the smooth disorder. Experimental relevance to the transport in semiconductor heterostructures is discussed.

  • Received 5 April 2001

DOI:https://doi.org/10.1103/PhysRevLett.87.126805

©2001 American Physical Society

Authors & Affiliations

A. D. Mirlin1,2,*, D. G. Polyakov1,†, F. Evers1, and P. Wölfle1,2

  • 1Institut für Nanotechnologie, Forschungszentrum Karlsruhe, 76021 Karlsruhe, Germany
  • 2Institut für Theorie der Kondensierten Materie, Universität Karlsruhe, 76128 Karlsruhe, Germany

  • *Also at Petersburg Nuclear Physics Institute, 188350 St. Petersburg, Russia.
  • Also at A. F. Ioffe Physico-Technical Institute, 194021 St. Petersburg, Russia.

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Vol. 87, Iss. 12 — 17 September 2001

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