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Time-dependent Schwinger boson mean-field theory of supermagnonic propagation in 2D antiferromagnets
by M. D. Bouman, J. H. Mentink
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Submission summary
| Authors (as registered SciPost users): | Johan Mentink |
| Submission information | |
|---|---|
| Preprint Link: | https://arxiv.org/abs/2306.16382v2 (pdf) |
| Date accepted: | 2024-11-11 |
| Date submitted: | 2024-10-08 06:14 |
| Submitted by: | Mentink, Johan |
| Submitted to: | SciPost Physics |
| Ontological classification | |
|---|---|
| Academic field: | Physics |
| Specialties: |
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| Approaches: | Theoretical, Computational |
Abstract
Understanding the speed limits for the propagation of magnons is of key importance for the development of ultrafast spintronics and magnonics. Recently, it was predicted that in 2D antiferromagnets, spin correlations can propagate faster than the highest magnon velocity. Here we gain deeper understanding of this supermagnonic effect based on time-dependent Schwinger boson mean-field theory. We find that the supermagnonic effect is determined by the competition between propagating magnons and a localized quasi-bound state, which is tunable by lattice coordination and quantum spin value $S$, suggesting a new scenario to enhance magnon propagation.
Author indications on fulfilling journal expectations
- Provide a novel and synergetic link between different research areas.
- Open a new pathway in an existing or a new research direction, with clear potential for multi-pronged follow-up work
- Detail a groundbreaking theoretical/experimental/computational discovery
- Present a breakthrough on a previously-identified and long-standing research stumbling block
List of changes
- Added explanation on light-matter interaction on relevant pulse shape for condensed matter systems
- Adapted introduction to make novelty beyond previous work more clear
- Moved technical parts of derivation to appendix
- Added paragraph to highlight physics included in SBMFT that goes beyond LSWT
Published as SciPost Phys. 17, 159 (2024)
Reports on this Submission
Report
In the new submission of their paper the authors have tried to improve on the presentation of their theory. Unfortunately, they have not supplied a list of the essential changes into the manuscript, which complicates significantly a refereeing job. I find that my recommendation to better expose the physical context has not been properly addressed. Still taking in account novelty and general interest I can recommend to publish the paper in the present form.
The only final request is to correct a sentence preceding Eq.(10), which makes no sense to me.
Recommendation
Publish (meets expectations and criteria for this Journal)
Strengths
See previous report.
Weaknesses
Have been addressed.
Report
I am satisfied by the authors' response and changes in the manuscript, which can be accepted in its current form.
Recommendation
Publish (meets expectations and criteria for this Journal)