Positive Magnetoresistance of Composite Fermions in Laterally Modulated Structures

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Adopting the mean-field composite fermion picture, we describe the magneto-transport properties of a two-dimensional electron gas with laterally modulated density around filling factor 1/2. The occurrence of a strong positive magnetoresistance at low effective magnetic fields as well as Weiss oscillations, which were observed in recent experiments in such systems, can be explained within a semi-classical Boltzmann equation approach, provided one goes beyond a second order approximation in the modulation strength.
4 pages, 2 figures

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Mesoscale and Nanoscale Physics

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http://salesiana.dossiersoluciones.com/handle/123456789/29411

Consulte el texto completo en el siguiente enlace:

https://arxiv.org/abs/cond-mat/9906296
 http://arxiv.org/abs/cond-mat/9906296

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arXiv