Single-Electron Charging Effects in Sketched LaAlO3/SrTiO3 Single-Electron Transistors

ORAL

Abstract

Mesoscopic devices like the single-electron transistor (SET) exhibit quantum behavior by forcing electrical current through a point-like constriction with quantized energy levels. Such devices typically require extreme nanofabrication techniques. Complex-oxide heterostructures such as the LaAlO3/SrTiO3 system support conductive interfaces that can be controlled using a reversible conductive-AFM lithography technique. These interfaces have richer properties than III-V or silicon-based systems, and support intrinsic magnetic, superconducting and structural phases. Here we describe renewed efforts to explore the properties of “sketched” SETs at the LaAlO3/SrTiO3 interface, focusing on the temperature and magnetic-field dependence of transport. We observe non-equilibrium conductances that cleanly resolve addition energies in nanoscale quantum dots, and track interactions between electronic states vs. experimental parameters such as gate voltage, temperature and magnetic field. These results yield new insights into intrinsic interactions between electrons confined within the quantum dot.

–

Presenters

  • Philip Shenk

    Department of Physics, University of Pittsburgh

Authors

  • Philip Shenk

    Department of Physics, University of Pittsburgh

  • John Maier

    Department of Physics, University of Notre Dame

  • Juliana Sebolt

    Department of Physics, Allegheny College

  • Jungwoo Lee

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

  • Hyungwoo Lee

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

  • Chang-Beom Eom

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

  • Jianan Li

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

  • Patrick Irvin

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

  • Jeremy Levy

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