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Multilevel Atomic-Scale Transistors Based on Metallic Quantum Point Contacts

Authors

  • Fangqing Xie,

    1. Institute of Applied Physics and Center for Functional Nanostructures (CFN) University of Karlsruhe, Karlsruhe Institute of Technology (KIT) 76131 Karlsruhe (Germany)
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  • Robert Maul,

    1. Institute of Nanotechnology, Forschungszentrum Karlsruhe, Karlsruhe Institute of Technology (KIT), 76021 Karlsruhe, Germany
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  • Christian Obermair,

    1. Institute of Applied Physics and Center for Functional Nanostructures (CFN) University of Karlsruhe, Karlsruhe Institute of Technology (KIT) 76131 Karlsruhe (Germany)
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  • Wolfgang Wenzel,

    Corresponding author
    1. Institute of Nanotechnology and Center for Functional Nanostructures (CFN) Forschungszentrum Karlsruhe, Karlsruhe Institute of Technology (KIT) 76021 Karlsruhe (Germany)
    • Institute of Nanotechnology and Center for Functional Nanostructures (CFN) Forschungszentrum Karlsruhe, Karlsruhe Institute of Technology (KIT) 76021 Karlsruhe (Germany).
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  • Gerd Schön,

    1. Institute of Nanotechnology and Center for Functional Nanostructures (CFN) Forschungszentrum Karlsruhe, Karlsruhe Institute of Technology (KIT) 76021 Karlsruhe (Germany)
    2. Institut für Theoretische Festkörperphysik and Center for Functional Nanostructures (CFN) University of Karlsruhe, Karlsruhe Institute of Technology (KIT) 76131 Karlsruhe (Germany)
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  • Thomas Schimmel

    Corresponding author
    1. Institute of Nanotechnology and Center for Functional Nanostructures (CFN) Forschungszentrum Karlsruhe, Karlsruhe Institute of Technology (KIT) 76021 Karlsruhe (Germany)
    2. Institute of Applied Physics and Center for Functional Nanostructures (CFN) University of Karlsruhe, Karlsruhe Institute of Technology (KIT) 76131 Karlsruhe (Germany)
    • Institute of Applied Physics and Center for Functional Nanostructures (CFN) University of Karlsruhe, Karlsruhe Institute of Technology (KIT) 76131 Karlsruhe (Germany).
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Abstract

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Multilevel logic and storage devices on the atomic scale are of great interest as they allow more efficient data storage and processing with a smaller number of logical gates. Here we demonstrate a multilevel atomic quantum transistor, allowing for the gate-controlled switching between different quantized conducting states providing a basis for the future development of novel ultra-small quantum- electronic devices.

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