Development of single-electron and single-electron-pair sources in LaAlO<sub>3</sub>/SrTiO<sub>3</sub> nanostructures

ORAL

Abstract

A source of single electrons can be realized by coupling quantum dots with tunnel barriers [1]. The 2D electron gas at the LaAlO3/SrTiO3 interface can be patterned using conductive atomic force microscope (c-AFM) lithography [2], which has been used to create quantum dots and single electron transistors [3]. We aim to use this technique to create an on-demand single-electron source by sketching quantum dots and applying out-of-phase excitation across the dot array. We discuss results for a triple-dot device and their associated electron tunneling phenomenon and issues related to the individual tunabilities of the dots. These devices may have application to quantum computation and simulation, and could also provide a robust standard for the electric unit ampere.
[1] H. Pothier et al, EPL 17, 249 (1992).
[2] C. Cen et al, Nature Mater. 7, 298 (2008).
[3] G. Cheng et al, Nature Nanotechnology 6, 343 (2011).

*JL acknowledges a Vannevar Bush Faculty Fellowship, funded by ONR (N00014-15-1-2847). C-BE acknowledges support from NSF DMREF (DMR-1629270), AFOSR (FA9550-15-1-0334), and AOARD (FA2386-15-1-4046).

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Presenters

  • Yang Hu

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

Authors

  • Yang Hu

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

  • Yuhe Tang

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

  • Dengyu Yang

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

  • Yun-Yi Pai

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

  • Jianan Li

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

  • Hyungwoo Lee

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

  • Jung-Woo Lee

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

  • Chang-Beom Eom

    • Univ of Wisconsin-Madison
    • Materials Science and Engineering, University of Wisconsin-Madison
    • University of Wisconsin–Madison
    • Department of Materials Science and Engineering, University of Wisconsin-Madison
    • Materials Science & Engineering, University of Wisconsin-Madison
    • University of Wisconsin - Madison
    • Department of Materials Science and Engineering, University of Wisconsin - Madison
    • Department of Materials Science and Engineering, University of Wisconsin at Madison

  • Patrick Irvin

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

  • Jeremy Levy

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