Strong magnetoresistance induced by long-range disorder
Abstract
We calculate the semiclassical magnetoresistivity xx(B) of non-interacting fermions in two dimensions moving in a weak and smoothly varying random potential or random magnetic field. We demonstrate that in a broad range of magnetic fields the non-Markovian character of the transport leads to a strong positive magnetoresistance. The effect is especially pronounced in the case of a random magnetic field where xx(B) becomes parametrically much larger than its B=0 value.
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