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An Effective Field Theory of Magneto-Elasticity

by Shashin Pavaskar, Riccardo Penco, Ira Z. Rothstein

This Submission thread is now published as

Submission summary

Authors (as registered SciPost users): Shashin Pavaskar
Submission information
Preprint Link: scipost_202203_00015v1  (pdf)
Date accepted: 2022-04-04
Date submitted: 2022-03-13 23:17
Submitted by: Pavaskar, Shashin
Submitted to: SciPost Physics
Ontological classification
Academic field: Physics
Specialties:
  • Condensed Matter Physics - Theory
  • High-Energy Physics - Theory
Approach: Theoretical

Abstract

We utilize the coset construction to derive the effective field theory of magnon-phonon interactions in (anti)-ferromagnetic and ferrimagnetic insulating materials. The action is used to calculate the equations of motion which generalize the Landau-Lifshitz and stress equations to allow for magneto-acoustic couplings to all orders in the fields at lowest order in the derivative expansion. We also include the symmetry breaking effects due to Zeeman, and Dzyaloshinsky-Moriya interactions. This effective theory is a toolbox for the study of magneto-elastic phenomena from first principles. As an example we use this theory to calculate the leading order contribution to the magnon decay width due to its the decay into phonons.

Author comments upon resubmission

We thank the referees for their positive comments on the manuscript. We have made certain changes to the manuscript which we have listed below. Unfortunately we could not add further comments on the directions suggested by one of the referees. We hope the paper is acceptable for publication.

Thank you,
Shashin Pavaskar, Riccardo Penco and Ira Z. Rothstein

List of changes

1. We added comments below eq. (70) and (71) on how the exact form of the functional F(B) can be fixed.
2. We have fixed typos wherever necessary.

Published as SciPost Phys. 12, 155 (2022)


Reports on this Submission

Anonymous Report 2 on 2022-3-29 (Invited Report)

  • Cite as: Anonymous, Report on arXiv:scipost_202203_00015v1, delivered 2022-03-29, doi: 10.21468/SciPost.Report.4808

Strengths

1. The paper was well-written and easy to follow.

2. The purpose of the paper was clear from the beginning and all calculations were carried out methodically to support the initial purpose.

3. The topic of the paper was interesting and has clearly opened avenues of future research.

4. Not only did the authors treat the subject of magnons in solids from a novel perspective, they also derived new, more general equations governing their behavior.

Weaknesses

1. None

Report

This journal's acceptance criteria are met and I recommend this paper for publication.

Requested changes

None

  • validity: top
  • significance: good
  • originality: high
  • clarity: top
  • formatting: perfect
  • grammar: perfect

Anonymous Report 1 on 2022-3-14 (Invited Report)

Report

The journal's acceptance criteria are met in the new version as well, so I recommend the paper for publication.

  • validity: -
  • significance: -
  • originality: -
  • clarity: -
  • formatting: -
  • grammar: -

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