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Giant Magnetoresistance in Lateral Surface Superlattices

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DOI to cite this document:
Müller, G. ; Streda, P. ; Weiss, Dieter ; Klitzing, K. v. ; Weimann, G.
Date of publication of this fulltext: 05 Aug 2009 13:57


We investigate the low-field magnetoresistance ñxx perpendicular to a one- dimensional periodic potential which is imposed upon a two-dimensional electron gas in GaAs-AlxGa1-xAs heterojunctions. Distinct low-field anomalies and a crossover from positive to large negative magnetoresistance with increasing potential strength unveil the important role of anisotropic relaxation processes in strongly modulated electron systems.

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