Magneto-transport Spectroscopy of Hole Quantum Dots in Monolayer WSe<sub>2</sub>

ORAL

Abstract

Towards the objective of achieving practical quantum devices in which qubits can be realized with carriers confined in two-dimensional (2D) transition metal dichalcogenides (TMDs) quantum dots, we perform transport experiments revealing the magneto-spectroscopy of a hole quantum dot in monolayer tungsten diselenide (WSe2) in the Coulomb blockade regime. TMD-based qubits are of particular interest due to properties such as: strong spin-orbit coupling for qubit manipulation1,2, spin-valley locking for qubit robustness and potentially long coherence times, as well as an optically active band dispersion for photonic-solid-state hybrid architectures. In this talk, we present transport spectroscopy measurements of an incidental gate-controlled hole quantum dot formed in a monolayer WSe2 heterostructure. By applying a perpendicular magnetic field, we observe the evolution of several consecutive Coulomb blockade peaks at low and high bias giving insight into the physics of ground and excited states of this system. These results provide a better understanding of the interplay between valley and spin degrees of freedom in TMD quantum dots.

1. Altintas, Bieniek, Dusko, Korkusinski, Pawlowski and Hawrylak Physical Review B 104 (2021) 195412

2. Pawlowski, Bieniek and Wozniak Physical Review Applied 15 (2021) 054025

*We acknowledge the HTSN and QSP programs, NSERC ALLRP/578466-2022, Discovery Grant No. RGPIN-2019-05714, University of Ottawa Research Chair in Quantum Theory of Quantum Materials, Nanostructures, and Devices and CIFAR

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Presenters

  • Antoine Labbé

    • University of Ottawa / National Research Council of Canada
    • National Research Council of Canada / University of Ottawa

Authors

  • Antoine Labbé

    • University of Ottawa / National Research Council of Canada
    • National Research Council of Canada / University of Ottawa

  • Justin Boddison-Chouinard

    • University of Ottawa

  • Alex Bogan

    • National Research Council

  • Kenji Watanabe

    • National Institute for Materials Science
    • Research Center for Functional Materials, National Institute of Materials Science, 1-1 Namiki Tsukuba, Ibaraki 305-0044, Japan

  • Jean Lapointe

    • NRC
    • National Research Council

  • Takashi Taniguchi

    • National Institute for Materials Science
    • Research Center for Materials Nanoarchitectonics, National Institute for Materials Science
    • International Center for Materials Nanoarchitectonics, National Institute of Materials Science, 1-1 Namiki Tsukuba, Ibaraki 305-0044, Japan
    • Research Center for Functional Materials, National Institute of Materials Science, 1-1 Namiki Tsukuba, Ibaraki 305-0044, Japan

  • Marek J Korkusinski

    • National Research Council Canada
    • Natl Res Council

  • Adina A Luican-Mayer

    • University of Ottawa

  • Louis Gaudreau

    • National Research Council Canada
    • Natl Res Council