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Fabricating van der Waals Heterostructures with Precise Rotational Alignment
Published on: July 5, 2019
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Enhanced two-dimensional ferromagnetism in van der Waals β-UTe3 monolayers
Sean M Thomas1, Andres E Llacsahuanga Allcca2, Wolfgang Simeth1
1Los Alamos National Laboratory, Los Alamos, NM 87545, USA.
Science Advances
|March 25, 2026
Summary
Researchers discovered a new two-dimensional (2D) magnet, uranium tritelluride (UTe3), which remains ferromagnetic in its single-layer form. This 2D magnetic material exhibits enhanced properties, opening doors for quantum control applications.
Area of Science:
- Condensed Matter Physics
- Materials Science
- Quantum Materials
Background:
- Local-moment magnetism in 2D van der Waals (vdW) semiconductors has revolutionized 2D magnet understanding.
- Incorporating strong electronic and magnetic correlations in 2D vdW metals is crucial for controlling emergent quantum phases.
- Discovery of metallic vdW platforms, especially f-electron monolayers, remains challenging.
Purpose of the Study:
- To investigate the exfoliation and magnetic properties of strongly correlated β-uranium tritelluride (β-UTe3) down to the monolayer limit.
- To explore the potential of β-UTe3 as a platform for studying correlated behavior in 2D materials.
- To enable new avenues for quantum control in 2D magnetic systems.
Main Methods:
- Exfoliation of bulk β-uranium tritelluride (β-UTe3) to the monolayer limit.
- Characterization of magnetic properties of monolayer β-UTe3.
- Measurement of magnetic ordering temperature.
Main Results:
- Successfully exfoliated β-uranium tritelluride (β-UTe3) to the monolayer limit.
- Monolayer β-UTe3 exhibits unexpected ferromagnetism.
- The magnetic ordering temperature of monolayer β-UTe3 is enhanced to 35 Kelvin, double that of its bulk form.
Conclusions:
- β-uranium tritelluride (β-UTe3) is established as a viable materials platform for investigating and modeling correlated behavior in 2D.
- The enhanced ferromagnetism in monolayer β-UTe3 opens possibilities for quantum control via methods like strain engineering.
- This discovery advances the field of 2D magnets and correlated electron systems.
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