Strong magnetoresistance induced by long-range disorder

Details Strong magnetoresistance induced by long-range disorder Strong magnetoresistance induced by long-range disorder

1999-05-25

arxiv.org/abs/cond-mat/9905364v1

Phys. Rev. Lett. 83, 2801 (1999).

Physics

Condensed Matter

Disordered Systems and Neural Networks

REVTEX, 4 pages, 2 eps figures

Scientific paper

10.1103/PhysRevLett.83.2801

We calculate the semiclassical magnetoresistivity $\rho_{xx}(B)$ 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 $\rho_{xx}(B)$ becomes parametrically much larger than its B=0 value.

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