Affiliation:
1. Carnegie Mellon University
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.
Funder
National Science Foundation
United States Department of Energy
Subject
General Physics and Astronomy
Cited by
2 articles.
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