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The effect of carrier density gradients on magnetotransport data measured in Hall bar geometry

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arxiv cond-mat/0306063 v1 pith:4AEHNX2H submitted 2003-06-03 cond-mat.mes-hall

L. A. Ponomarenko , D. T. N. de Lang , A. de Visser , V. A. Kulbachinskii , G. B. Galiev , H. Künzel , A. M. M. Pruisken This is my paper · ORCID
classification cond-mat.mes-hall
keywords halleffectmeasuredcarrierdensitygeometrygradientsmagnetotransport
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We have measured magnetotransport of the two-dimensional electron gas in a Hall bar geometry in the presence of small carrier density gradients. We find that the longitudinal resistances measured at both sides of the Hall bar interchange by reversing the polarity of the magnetic field. We offer a simple explanation for this effect and discuss implications for extracting conductivity flow diagrams of the integer quantum Hall effect.

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