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Updated: Apr 17, 2026

All-electronic Nanosecond-resolved Scanning Tunneling Microscopy: Facilitating the Investigation of Single Dopant Charge Dynamics

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Time-Resolved Charge Detection in Transition Metal Dichalcogenide Quantum Dots.

Markus Niese¹, Michele Masseroni¹, Clara Scherm¹

¹Laboratory for Solid State Physics, ETH Zürich, CH-8093 Zürich, Switzerland.

|April 15, 2026

Summary

Researchers explored electronic transport in molybdenum disulfide (MoS₂) quantum dots. They achieved charge detection in the few-electron regime, enabling single-shot measurements for quantum information applications.

Keywords:

Charge Detection Molybdenum Disulfide Quantum Dot Transition Metal Dichalcogenides Tunneling

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Area of Science:

Condensed Matter Physics
Materials Science
Quantum Computing

Background:

Quantum dots are crucial for quantum information processing.
Molybdenum disulfide (MoS₂) offers unique electronic properties for novel quantum devices.

Purpose of the Study:

To investigate electronic transport in gate-defined quantum dots within MoS₂.
To demonstrate charge detection capabilities for accessing the few-electron regime.
To explore the potential of MoS₂ quantum dots for quantum information applications.

Main Methods:

Fabrication of gate-defined quantum dots in MoS₂.
Utilizing an integrated charge detector for precise measurements.
Characterizing electronic transport and dot occupation under varying coupling regimes.

Main Results:

Observed a transition from weakly coupled single dots to a strongly coupled double quantum dot system.
Successfully measured dot occupation via charge detection, even when direct transport current was undetectable.
Resolved individual tunneling events due to suppressed tunneling rates in MoS₂.

Conclusions:

Established a viable platform for single-shot spin- and valley-to-charge conversion.
Highlighted the significant potential of transition-metal dichalcogenide quantum dots for quantum information technologies.