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Related Experiment Video

Updated: Jun 27, 2026

Scalable Quantum Integrated Circuits on Superconducting Two-Dimensional Electron Gas Platform

Scalable Quantum Integrated Circuits on Superconducting Two-Dimensional Electron Gas Platform

Published on: August 2, 2019

Tunable graphene dc superconducting quantum interference device.

Caglar Girit¹, V Bouchiat, O Naaman

¹Department of Physics, University of California, Materials Sciences Division, Lawrence Berkeley National Laboratory, Quantum Nanoelectronics Laboratory, University of California, Berkeley, California 94720, USA.

|December 19, 2008

Summary

This summary is machine-generated.

Researchers fabricated a graphene superconducting quantum interference device (SQUID) that allows supercurrent control via gate or magnetic field. This offers a new platform for sensitive nanomagnetometry and studying electronic transport in graphene.

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Area of Science:

Condensed Matter Physics
Materials Science
Nanotechnology

Background:

Graphene possesses unique electrical properties due to its reduced dimensionality and relativistic band structure.
Graphene supports Cooper pair transport when contacted with superconducting electrodes, enabling the Josephson effect.

Purpose of the Study:

To report the fabrication and operation of a two-junction direct current superconducting quantum interference device (SQUID) using a single graphene sheet.
To demonstrate the modulation of supercurrent in the graphene SQUID via electrostatic gating and applied magnetic fields.

Main Methods:

Fabrication of a graphene loop structure contacted with aluminum/palladium superconducting electrodes.
Characterization of the device's response to electrostatic gate modulation and magnetic field application.

Main Results:

Successful fabrication and operation of a two-junction dc SQUID based on a single graphene sheet.
Demonstrated control of the supercurrent in the graphene SQUID using both electrostatic gates and magnetic fields.

Conclusions:

The developed graphene SQUID is a potentially powerful tool for probing electronic transport in graphene.
This device serves as an ultrasensitive platform for nanomagnetometry applications.