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Related Experiment Video

Updated: Feb 23, 2026

All-electronic Nanosecond-resolved Scanning Tunneling Microscopy: Facilitating the Investigation of Single Dopant Charge Dynamics
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Multiple periodicity in a nanoparticle-based single-electron transistor.

O Bitton1,2, D B Gutman3, R Berkovits3

  • 1Chemical Research Support department, Weizmann Institute of Science, Rehovot, 76100, Israel. ora.bitton@weizmann.ac.il.

Nature Communications
|September 3, 2017
PubMed
Summary
This summary is machine-generated.

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Researchers developed single-electron transistors with tunable coupling, observing multi-periodic conductance oscillations. These harmonics, related to fractional electron charge changes, offer potential for miniaturized nano-electronics.

Area of Science:

  • Nanoscience and Nanotechnology
  • Condensed Matter Physics
  • Solid State Physics

Background:

  • Single-electron transistors (SETs) are crucial nano-devices for low-power integrated circuits.
  • The Coulomb blockade effect causes conductance oscillations in SETs.
  • Controlling SET coupling to leads is key for advanced functionalities.

Purpose of the Study:

  • To explore SETs with a single metallic nanoparticle and tunable coupling.
  • To investigate a unique transport regime with multi-periodic conductance oscillations.
  • To demonstrate controllable tuning of harmonic strengths in SETs.

Main Methods:

  • Fabrication of single-electron transistors using a unique technique.
  • Utilizing a single metallic nanoparticle as the quantum dot.

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  • Precisely controlling the coupling between the nanodot and electric leads.

    • Main Results:

    • Demonstration of multi-periodic conductance oscillations in SETs.
    • Observation of additional periods as harmonics of the basic Coulomb blockade periodicity.
    • Controllable tuning of the relative strength of these harmonic oscillations.
    • Harmonics correspond to fractional electron charge changes on the quantum dot.

    Conclusions:

    • The multi-periodic oscillations and tunable harmonics represent a novel transport regime in SETs.
    • These findings highlight the potential of such SETs for future miniaturization of nano-sized circuit elements.
    • The ability to control fractional charge effects opens new avenues for nanoscale electronics.