Thermal Activation Behavior in Graphene Quantum Dots

ORAL

Abstract

We showed that graphene quantum dots can be used as very sensitive detectors for electromagnetic radiation via the bolometric effect as well as for electrical readout of magnetic switching of single-molecule magnets [1,2]. This is because our graphene quantum-dot devices show thermally activated conductance at temperatures ranging from 10 K to 100 K. Here we study how changes in geometry, an applied gate voltage, and an external magnetic field affects the devices’ electrical properties.

[1] Alqahtani, A. et al. Electrical Detection of Magnetization Switching in Single-Molecule Magnets. Preprint at https://doi.org/10.48550/arXiv.2407.21156 (2024).

[2] El Fatimy, A. et al. Epitaxial graphene quantum dots for high-performance terahertz bolometers. Nature Nanotech 11, 335–338 (2016).

–

Presenters

  • DaVonne Henry

    • Georgetown University

Authors

  • DaVonne Henry

    • Georgetown University

  • Amjad Alqahtani

    • Georgetown University

  • Yijing Liu

    • Georgetown University

  • Cheng-Hsueh Yang

    • National Taiwan University

  • Ching-Chen Yeh

    • National Taiwan University

  • Ngoc Thanh Mai Tran

    • University of Maryland College Park
    • University of Maryland
    • Joint Quantum Institute, University of Maryland

  • Albert F Rigosi

    • National Institute of Standards and Technology
    • Physical Measurement Laboratory, National Institute of Standards and Technology
    • National Institute of Standards and Technology (NIST)

  • Amy Y Liu

    • Georgetown University

  • Paola Barbara

    • Georgetown University