Magnetotransport in lateral superlattices with small-angle impurity scattering: Low-field magnetoresistance

Details Magnetotransport in lateral superlattices with small-angle impurity scattering: Low-field magnetoresistance Magnetotransport in lateral superlattices with small-angle impurity scattering: Low-field magnetoresistance

2000-12-21

arxiv.org/abs/cond-mat/0012417v1

Phys. Rev. B 64, 125319 (2001).

Physics

Condensed Matter

Disordered Systems and Neural Networks

8 pages, 3 figures included

Scientific paper

10.1103/PhysRevB.64.125319

An analytical study of the low-field magnetoresistance of a two-dimensional electron gas subject to a weak periodic modulation is presented. We assume small-angle impurity scattering characteristic for high-mobility semiconductor heterostructures. It is shown that the condition for existence of the strong low-field magnetoresistance induced by so-called channeled orbits is $\eta^{3/2}ql\gg 1$, where $\eta$ and $q$ are the strength and the wave vector of the modulation, and $l$ is the transport mean free path. Under this condition, the magnetoresistance scales as $\eta^{7/2}$.

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