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Visualizing Uniaxial-strain Manipulation of Antiferromagnetic Domains in Fe1+YTe Using a Spin-polarized Scanning Tunneling Microscope
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Supermagnonic Propagation in Two-Dimensional Antiferromagnets
G Fabiani1, M D Bouman1, J H Mentink1
1Radboud University, Institute for Molecules and Materials (IMM) Heyendaalseweg 135, 6525 AJ Nijmegen, Netherlands.
Physical Review Letters
|September 10, 2021
Summary
We studied magnon propagation in a 2D Heisenberg antiferromagnet after perturbations. Magnon interactions significantly enhance propagation speed, suggesting new ways to transfer information quickly.
Area of Science:
- Condensed matter physics
- Quantum magnetism
Background:
- Magnons are fundamental quasiparticles in magnetic materials.
- Understanding their dynamics is crucial for spintronics and quantum information.
- Previous studies often focused on linear dynamics or longer timescales.
Purpose of the Study:
- To investigate magnon propagation dynamics after ultrashort perturbations.
- To explore the role of magnon-magnon interactions in this process.
- To identify potential mechanisms for enhanced information transfer.
Main Methods:
- Utilized neural quantum states, a powerful numerical technique.
- Simulated ultrashort perturbations of the exchange interaction.
- Analyzed the spatial and temporal spreading of magnons.
Main Results:
- Predicted highly anisotropic magnon spreading, constrained by perturbation symmetry.
- Observed propagation speeds up to 40% higher than the maximum magnon velocity at short scales.
- Identified strong magnon-magnon interactions as the source of this enhancement.
Conclusions:
- Ultrastrong magnon-magnon interactions can dramatically accelerate magnon propagation.
- This phenomenon offers novel pathways for manipulating information transfer on ultrashort timescales.
- Highlights the potential of neural quantum states for studying complex quantum dynamics.
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