Electron Transport through curved and rolled Two Dimensional Electron Gas

ORAL

Abstract

We report on topology dependent electron transport in tubular shaped two-dimensional electron gases. These micron-sized tubes are realized in a strained InGaAs quantum well. This is the first step towards investigating geometric potentials in low dimensional quantum systems. We investigate magneto-resistance of the tubular systems in a perpendicularly applied magnetic field. At low magnetic field, an increased zero field magneto resistance followed by a negative magneto resistance is observed. We ascribe this effect to an increase in electron scattering along the curved regions due to newly formed dangling bonds. At high magnetic fields we observe a linear increase in resistance of the curved region as compared to planar regions.

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Authors

  • Nakul Shaji

    • Electrical and Computer Engineering, University of Wisconsin-Madison
    • Univeristy of Wisconsin-Madison

  • Hua Qin

  • Levente Klien

    • Department of Physics, University of Wisconsin-Madison

  • Mark Eriksson

    • Department of Physics, University of Wisconsin-Madison

  • Robert Blick

    • University of Wisconsin-Madison
    • Laboratory for Molecular Scale Engineering, Electrical and Computer Engineering, University of Wisconsin-Madison
    • Department of Electrical and Computer Engineering, University of Wisconsin-Madison
    • Electrical and Computer Engineering, University of Wisconsin-Madison

  • Christopher Deneke

    • Max-Plank-Institut f\"{u}r Festk\"{o}rperforschung

  • Oliver Schmidt