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Updated: Aug 5, 2025
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Visualizing Uniaxial-strain Manipulation of Antiferromagnetic Domains in Fe1+YTe Using a Spin-polarized Scanning Tunneling Microscope
Published on: March 24, 2019
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Strain-tunable skyrmions in two-dimensional monolayer Janus magnets.
Yue-Tong Han1, Wei-Xiao Ji1, Pei-Ji Wang1
1School of Physics and Technology, University of Jinan, Jinan, Shandong, 250022, People's Republic of China. ss_zhangchw@ujn.edu.cn.
Nanoscale
|March 24, 2023
Summary
Janus monolayers of XSeTe (X = Nb, Re) exhibit significant Dzyaloshinskii-Moriya interaction (DMI) due to broken inversion symmetry. These 2D magnetic materials enable controllable skyrmion states for future spintronic devices.
Area of Science:
- Condensed Matter Physics
- Materials Science
- Spintronics
Background:
- The Dzyaloshinskii-Moriya interaction (DMI) is crucial for chiral magnetic states but absent in most 2D magnetic materials due to inversion symmetry.
- Breaking inversion symmetry is key to realizing DMI in novel 2D magnetic systems.
Purpose of the Study:
- To investigate the potential of Janus dichalcogenide monolayers (XSeTe, X = Nb, Re) for hosting significant DMI.
- To explore the magnetic properties and skyrmion formation in these engineered 2D materials.
Main Methods:
- First-principles calculations were employed to determine DMI and magnetic properties.
- Micromagnetic simulations were used to analyze skyrmion behavior under external stimuli.
Main Results:
- Janus XSeTe monolayers (NbSeTe, ReSeTe) exhibit substantial DMI amplitudes, exceeding experimental values for Co/graphene.
- NbSeTe and ReSeTe monolayers demonstrate high Curie temperatures (1023 K and 689 K, respectively).
- ReSeTe monolayers support tunable skyrmion states controllable by magnetic fields and external strain.
Conclusions:
- Engineered Janus XSeTe monolayers provide a viable platform for achieving DMI in 2D magnetic materials.
- These materials hold promise for developing advanced spintronic devices utilizing chiral magnetic structures and skyrmions.
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