Single-Electron Charging Effects in Sketched LaAlO<sub>3</sub>/SrTiO<sub>3</sub> 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.
*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
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
