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).
[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).
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Presenters
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DaVonne Henry
Georgetown University
Authors
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DaVonne Henry
Georgetown University
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Amjad Alqahtani
Georgetown University
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Yijing Liu
Georgetown University
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Cheng-Hsueh Yang
National Taiwan University
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Ching-Chen Yeh
National Taiwan University
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Ngoc Thanh Mai Tran
University of Maryland College Park, University of Maryland, Joint Quantum Institute, University of Maryland
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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)
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Amy Y Liu
Georgetown University
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Paola Barbara
Georgetown University