Aharonov-Bohm interference of integer and fractional quantum Hall edge modes in small electronic Fabry-Perot interferometers

ORAL

Abstract

Electronic Fabry-Perot interferometers may be used to probe quantum Hall edge states; however, Coulomb charging effects complicate the operation of small devices. We implement a novel GaAs/AlGaAs heterostructure design in which Coulomb charging effects are suppressed, enabling operation of small interferometers in the Aharonov-Bohm regime with high quantum coherence. We present measurements of the selective interference of inner and outer edge states in the integer quantum Hall regime. Aharonov-Bohm oscillations are observed at the fractional quantum Hall states ν = 2/3 and ν = 1/3.

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Presenters

  • James Nakamura

    • Purdue University

Authors

  • James Nakamura

    • Purdue University

  • Saeed Fallahi

    • Department of Physics and Astronomy, Purdue University, West Lafayette, Indiana 47907 USA
    • Purdue University
    • Department of Physics and Astronomy, Purdue University
    • Dept. of Physics, Purdue University
    • Dept. of Physics and Astronomy, Purdue

  • Shuang Liang

    • Purdue University

  • Geoffrey Gardner

    • Department of Physics and Astronomy, Purdue University
    • Purdue University
    • Birck Nano Technology Center, Purdue University
    • Dept. of Physics, Purdue University
    • Department of Physics and Astronomy and Station Q Purdue, Purdue University
    • Department of Physics and Astronomy, Station Q Purdue, and Birck Nanotechnology Center, Purdue University

  • Michael Manfra

    • Purdue University
    • Microsoft
    • Department of Physics and Astronomy and Station Q Purdue, Purdue University
    • Department of Physics and Astronomy, Purdue University
    • Department of Physics and Astronomy, Purdue University, West Lafayette, Indiana 47907 USA
    • Microsoft Station Q Purdue
    • Physics and Astronomy, Purdue University
    • Department of Physics and Astronomy, School of Materials Engineering and School of Electrical and Computer Engineering, Purdue University
    • Station Q Purdue and Department of Physics and Astronomy, Purdue University
    • Dept. of Physics, Purdue University
    • Department of Physics and Astronomy and Station Q Purdue, Birck Nanotechnology Center, Purdue University, West Lafayette, Indiana 47907, USA
    • Dept. of Physics and Astronomy, Purdue
    • Purdue University, Station Q Purdue
    • Department of Physics and Astronomy, Station Q Purdue, and Birck Nanotechnology Center, Purdue University