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Updated: Jan 14, 2026
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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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Ultrafast Spin Dynamics in 2D Fully Compensated Ferrimagnets: A Time-Dependent Ab Initio Study
Shuo Li1, Ran Wang1, Thomas Frauenheim1,2
1Institute for Advanced Study, Chengdu University, Chengdu 610106, China.
The Journal of Physical Chemistry Letters
|October 17, 2025
Summary
Fully compensated ferrimagnets (CFiMs) exhibit transient net magnetization upon laser excitation. This study reveals the ultrafast spin dynamics mechanism in 2D Janus CFiMs for spintronic applications.
Area of Science:
- Condensed Matter Physics
- Materials Science
- Quantum Chemistry
Background:
- Fully compensated ferrimagnets (CFiMs) offer zero net magnetization and high spin polarization, crucial for spintronics.
- Janus materials possess broken inversion symmetry, enabling unique electronic and magnetic properties.
Purpose of the Study:
- Investigate ultrafast laser-induced spin dynamics in a 2D Janus NiICl bilayer.
- Elucidate the mechanism behind transient magnetization in CFiMs.
Main Methods:
- Real-time time-dependent density functional theory (rt-TDDFT) simulations.
- Analysis of ultrafast laser-induced demagnetization and spin transfer.
Main Results:
- Observed asymmetric interlayer demagnetization within 50 fs.
- Identified asymmetric charge accumulation and optically induced spin transfer (OISTR) as key mechanisms.
- Demonstrated the transient ferrimagnetic state formation due to asymmetric interlayer interactions.
Conclusions:
- The intrinsic asymmetry of 2D Janus CFiMs drives ultrafast spin dynamics under laser irradiation.
- Asymmetric interlayer interactions are responsible for transient magnetization.
- This research provides insight into the microscopic mechanisms governing ultrafast spin dynamics in 2D CFiMs for advanced spintronic devices.
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