Print Email Facebook Twitter A Mechanically Tunable Quantum Dot in a Graphene Break Junction Title A Mechanically Tunable Quantum Dot in a Graphene Break Junction Author Caneva, S. (TU Delft BN/Cees Dekker Lab; TU Delft Dynamics of Micro and Nano Systems; TU Delft QN/van der Zant Lab; Kavli institute of nanoscience Delft) Hermans, Matthijs (Kavli institute of nanoscience Delft; Student TU Delft) Lee, M. (TU Delft QN/Steeneken Lab; Kavli institute of nanoscience Delft) García-Fuente, Amador (Universidad de Oviedo) Watanabe, Kenji (National Institute for Materials Science) Taniguchi, Takashi (National Institute for Materials Science) Dekker, C. (TU Delft BN/Cees Dekker Lab; Kavli institute of nanoscience Delft) Ferrer, Jaime (Universidad de Oviedo) van der Zant, H.S.J. (TU Delft QN/van der Zant Lab; Kavli institute of nanoscience Delft) Gehring, P. (TU Delft QN/van der Zant Lab; Kavli institute of nanoscience Delft) Date 2020 Abstract Graphene quantum dots (QDs) are intensively studied as platforms for the next generation of quantum electronic devices. Fine tuning of the transport properties in monolayer graphene QDs, in particular with respect to the independent modulation of the tunnel barrier transparencies, remains challenging and is typically addressed using electrostatic gating. We investigate charge transport in back-gated graphene mechanical break junctions and reveal Coulomb blockade physics characteristic of a single, high-quality QD when a nanogap is opened in a graphene constriction. By mechanically controlling the distance across the newly formed graphene nanogap, we achieve reversible tunability of the tunnel coupling to the drain electrode by 5 orders of magnitude, while keeping the source-QD tunnel coupling constant. The break junction device can therefore become a powerful platform to study the physical parameters that are crucial to the development of future graphene-based devices, including energy converters and quantum calorimeters. Subject graphenemechanical break junctionquantum dot (QD)tunnel coupling To reference this document use: http://resolver.tudelft.nl/uuid:45472647-4f76-4955-8732-123c0921db7a DOI https://doi.org/10.1021/acs.nanolett.0c00984 ISSN 1530-6984 Source Nano Letters: a journal dedicated to nanoscience and nanotechnology, 20 (7), 4924-4931 Part of collection Institutional Repository Document type journal article Rights © 2020 S. Caneva, Matthijs Hermans, M. Lee, Amador García-Fuente, Kenji Watanabe, Takashi Taniguchi, C. Dekker, Jaime Ferrer, H.S.J. van der Zant, P. Gehring Files PDF acs.nanolett.0c00984.pdf 4.54 MB Close viewer /islandora/object/uuid:45472647-4f76-4955-8732-123c0921db7a/datastream/OBJ/view