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The effect of carrier density gradients on magnetotransport data measured in Hall bar geometry |
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| Authors: | LA Ponomarenko VA Kulbachinskii H Künzel |
| Institution: | a Van der Waals-Zeeman Institute, University of Amsterdam, Valckenierstraat 65, 1018 XE Amsterdam, The Netherlands b Department of Low Temperature Physics, Moscow State University, 119899 Moscow, Russia c Institute of Ultrahigh Frequency Semiconductor Electronics, RAS, 117105 Moscow, Russia d Fraunhofer-Institut für Nachrichtentechnik, Heinrich-Hertz-Institut, 10587 Berlin, Germany e Institute for Theoretical Physics, University of Amsterdam, Valckenierstraat 65, 1018 XE Amsterdam, The Netherlands |
| Abstract: | 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. |
| Keywords: | 73 43 Qt 73 43 Nq |
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