Quantum transport of nanoscale Hall crosses

ORAL

Abstract

Quantized Hall resistance in 2D electron systems arises due to edge modes. However, quantum transport in the extreme 1D limit is not as well understood, because quasi-1D semiconductor devices are highly susceptible to localization from disorder. Highly ballistic electron waveguides can now be routinely created at the LaAlO3/SrTiO3 (LAO/STO) interface using conductive atomic force microscopy lithography. These channels exhibit quantized ballistic conduction which is associated with lateral and vertical confinement within the waveguide. In this work, we investigate the transport characteristics of nanoscale Hall crosses. By creating transverse voltage probing leads inside the gated region of the waveguide, we can explore the interplay between confinement potential and magnetic field, and potentially investigate the transition between 1D waveguide modes and 2D edge states.

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Presenters

  • ADITI NETHWEWALA

    Department of Physics and Astronomy, University of Pittsburgh

Authors

  • ADITI NETHWEWALA

    Department of Physics and Astronomy, University of Pittsburgh

  • Anthony Tylan-Tyler

    Department of Physics and Astronomy, University of Pittsburgh

  • Yuhe Tang

    Physics and Astronomy, University of Pittsburgh, Department of Physics and Astronomy, University of Pittsburgh, Univ of Pittsburgh

  • Jianan Li

    Univ of Pittsburgh, University of Pittsburgh, Department of Physics and Astronomy, University of Pittsburgh

  • Hyungwoo Lee

    University of Wisconsin-Madison, Univ of Wisconsin-Madison, University of Wisconsin, University of Wisconsin–Madison, Department of Materials Science and Engineering, University of Wisconsin-Madison, Physics, University of Wisconsin–Madison, Department of Materials Science and Engineering, University of Wisconsin - Madison

  • Jungwoo Lee

    University of Wisconsin-Madison, Department of Materials Science and Engineering, University of Wisconsin-Madison, Department of Materials Science and Engineering, University of Wisconsin - Madison

  • Chang-Beom Eom

    University of Wisconsin-Madison, Univ of Wisconsin-Madison, Univ of Wisconsin, Madison, Department of Material Science and Engineering, University of Wisconsin-Madison, Matls Sci & Eng, University of Wisconsin-Madison, University of Wisconsin, Department of Materials Science and Engineering, University of Wisconsin-Madison, University of Wisconsin–Madison, MS&E, University of Wisconsin, Physics, University of Wisconsin–Madison, Department of Materials Science and Engineering, University of Wisconsin - Madison

  • Patrick Irvin

    Univ of Pittsburgh, University of Pittsburgh, Physics and Astronomy, University of Pittsburgh, Department of Physics and Astronomy, Univ of Pittsburgh, Department of Physics and Astronomy, University of Pittsburgh, Physics, University of Pittsburgh, Physics and Astronomy, Univ of Pittsburgh

  • Jeremy Levy

    Univ of Pittsburgh, Physics, Univ of Pittsburgh, University of Pittsburgh, Physics and Astronomy, University of Pittsburgh, Department of Physics and Astronomy, Univ of Pittsburgh, Department of Physics and Astronomy, University of Pittsburgh, Physics, University of Pittsburgh, Physics and Astronomy, Univ of Pittsburgh