Translational symmetries constrain how phonons interact in layered magnets

First-principles calculations and neutron scattering reveal phase symmetry constraints for phonons in simple geometries and give insights into dynamical stability of layered quantum magnets.

Incorporating translational symmetry into dynamics of conventional structures advances understanding of spin-phonon and other quasiparticle interactions important for quantum and thermal functionalities.

DOI: 10.1016/j.actamat.2022.118390