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Magnetotransport in a random array of antidots

Evers, Ferdinand ; Mirlin, A. D. ; Polyakov, D. G. ; Wölfle, P.


We study the quasiclassical magnetoresistance ρxx(B) of a two-dimensional electron gas scattered by a random ensemble of antidots and, additionally, by a smooth random potential. We demonstrate that the combination of the two types of disorder yields qualitatively new behavior of ρxx(B). In particular, (i) it induces a novel quasiclassical memory effect which leads to a strong negative ...


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