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Updated: Apr 11, 2026

Exfoliation and Analysis of Large-area, Air-Sensitive Two-Dimensional Materials

Exfoliation and Analysis of Large-area, Air-Sensitive Two-Dimensional Materials

Published on: January 5, 2019

Submicrometer-thick UTe₂ flake achieved by mechanical exfoliation.

Hyeok Yoon¹, Sungha Baek¹, Shanta R Saha¹

¹Maryland Quantum Materials Center, Department of Physics, University of Maryland, College Park, MD 20742, United States of America.

Superconductor Science & Technology

|April 10, 2026

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Researchers successfully exfoliated uranium ditelluride (UTe₂) into thin flakes for device fabrication. This method enables new measurements of topological superconductor properties and surface oxidation.

Area of Science:

Condensed Matter Physics
Materials Science
Quantum Materials

Background:

Uranium ditelluride (UTe₂) is a promising topological superconductor.
Fabricating devices from UTe₂ is crucial for understanding its physics and applications.
Non-van der Waals materials like UTe₂ possess natural cleavage planes facilitating exfoliation.

Purpose of the Study:

To demonstrate the mechanical exfoliation of uranium ditelluride (UTe₂) into thin flakes.
To fabricate electrical devices using these exfoliated UTe₂ flakes.
To investigate the electrical transport properties and surface characteristics of exfoliated UTe₂.

Main Methods:

Mechanical exfoliation of uranium ditelluride (UTe₂) crystals to obtain sub-micron thick flakes.

Keywords:

mechanical exfoliation non-van der Waals materials superconductivity

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Fabrication of electrical contacts on the exfoliated UTe₂ flakes.

Electrical transport measurements as a function of temperature and magnetic field.

Main Results:

Successful exfoliation of UTe₂ down to sub-micron thicknesses.
Fabrication of functional electrical devices from exfoliated UTe₂ flakes.
Electrical transport properties are consistent with crystallographic orientations; thin flakes allow critical current and surface oxidation measurements.

Conclusions:

The developed exfoliation technique is effective for UTe₂ device fabrication.
This method enables the study of properties difficult to probe in bulk crystals.
The approach is applicable to other non-van der Waals materials with easy-cleavage planes.