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October 22, 2023 conference-paper Aachen paper

Electrostatically defined graphene quantum dots

IEEE Nanotechnology Materials and Devices Conference (NMDC), pp. 670–671

DOI: 10.1109/nmdc57951.2023.10343990 OpenAlex

Abstract

We demonstrate high-quality gate-defined quantum dots in bilayer graphene and investigate their potential for charge, spin and valley qubits. We show a high level of control and tunability and a deep understanding of the states and level structures of these quantum dots. Recently, we measure promisingly long spin (~50ms) and valley (approaching 1s) relaxation times, comparable to the values obtained in other state-of-the-art semiconductor quantum dot spin qubit systems.

Authors 9

  1. Chuyao Tong

    ETH Zurich · Laboratory for Solid State Physics

    Affiliation as printed

    ETH Zurich,Solid State Physics Laboratory,Zurich,Switzerland

    Solid State Physics Laboratory, ETH Zurich, Zurich, Switzerland

  2. Rebekka Garreis

    ETH Zurich · Laboratory for Solid State Physics

    Affiliation as printed

    ETH Zurich,Solid State Physics Laboratory,Zurich,Switzerland

    Solid State Physics Laboratory, ETH Zurich, Zurich, Switzerland

  3. W. Huang

    ETH Zurich · Laboratory for Solid State Physics

    Affiliation as printed

    ETH Zurich,Solid State Physics Laboratory,Zurich,Switzerland

    Solid State Physics Laboratory, ETH Zurich, Zurich, Switzerland

  4. Lisa Maria Gächter

    ETH Zurich · Laboratory for Solid State Physics

    Affiliation as printed

    ETH Zurich,Solid State Physics Laboratory,Zurich,Switzerland

    Solid State Physics Laboratory, ETH Zurich, Zurich, Switzerland

  5. Max Josef Ruckriegel

    ETH Zurich · Laboratory for Solid State Physics

    Affiliation as printed

    ETH Zurich,Solid State Physics Laboratory,Zurich,Switzerland

    Solid State Physics Laboratory, ETH Zurich, Zurich, Switzerland

  6. Jonas D. Gerber

    ETH Zurich · Laboratory for Solid State Physics

    Affiliation as printed

    ETH Zurich,Solid State Physics Laboratory,Zurich,Switzerland

    Solid State Physics Laboratory, ETH Zurich, Zurich, Switzerland

  7. Annika Kurzmann Aachen 2nd Institute of Physics

    RWTH Aachen University

    Affiliation as printed

    RWTH Aachen University,2nd Institute of Physics,Aachen,Germany

    2nd Institute of Physics, RWTH Aachen University, Aachen, Germany

  8. Thomas Ihn

    ETH Zurich · Laboratory for Solid State Physics

    Affiliation as printed

    ETH Zurich,Solid State Physics Laboratory,Zurich,Switzerland

    Solid State Physics Laboratory, ETH Zurich, Zurich, Switzerland

  9. K. Ensslin

    ETH Zurich · Laboratory for Solid State Physics

    Affiliation as printed

    ETH Zurich,Solid State Physics Laboratory,Zurich,Switzerland

    Solid State Physics Laboratory, ETH Zurich, Zurich, Switzerland

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References 21