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Quasiclassical negative magnetoresistance of a 2D electron gas: interplay of strong scatterers and smooth disorder

A. D. Mirlin·D. G. Polyakov·F. Evers·P. Woelfle
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Abstract

We study the quasiclassical magnetotransport of non-interacting 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 $ρ_{xx}(B)$ at a value determined solely by the smooth disorder. Experimental relevance to the transport in semiconductor heterostructures is discussed.

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A. D. Mirlin, D. G. Polyakov, F. Evers, P. Woelfle. 2001-04-05. Quasiclassical negative magnetoresistance of a 2D electron gas: interplay of strong scatterers and smooth disorder. https://doi.org/10.1103/physrevlett.87.126805

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