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Magnon-phonon interaction in antiferromagnetic two-dimensional MXenes
Ke Wang1, Junjie He2, Min Zhang1
1Xidian University, Xi'an, Shanxi Province 710071, People's Republic of China.
Nanotechnology
|July 11, 2020
Summary
Antiferromagnetic MXenes like Cr2TiC2FCl show high magnon energy due to strong Cr-Cr exchange. Optical magnons interact more with phonons, influencing relaxation times and energy dissipation in spintronic devices.
Area of Science:
- Condensed Matter Physics
- Materials Science
- Spintronics
Background:
- Antiferromagnetic materials offer robustness for spintronic devices.
- Magnon-phonon interactions are crucial for spintronic device functionality.
Purpose of the Study:
- Investigate magnon-phonon interaction effects on magnon spectra in Cr2TiC2FCl.
- Calculate phonon-dominated magnon relaxation times.
Main Methods:
- First-principles calculations.
- Analysis of magnon spectra broadening.
- Study of spin-phonon coupling.
Main Results:
- Cr2TiC2FCl exhibits high magnon energy due to large Cr-Cr exchange constants.
- Optical magnons show stronger interaction with phonon modes than acoustic magnons.
- Distinct wavevector dependencies observed for optical and acoustic magnon relaxation times.
Conclusions:
- Magnon-phonon coupling significantly impacts magnon damping and energy dissipation in 2D antiferromagnets.
- Understanding spin coupling to phonon polarizations is key for designing spintronic devices.
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