Symmetry-Selective Topological Magnon Engineering by Phonon Angular Momentum
Abstract
Dynamical control of Berry curvature remains an outstanding challenge in the engineering of topological phases. Here, we demonstrate control of magnon band structures via coherently driven phonons, based on \textit{ab initio} spin-lattice coupling and Floquet theory. We show that this control is symmetry selective: linearly polarized phonons leave the spectrum unchanged, whereas circular and elliptical phonons carrying finite phonon angular momentum (PAM) induce chiral interactions that open and tune gaps at Dirac points, generating and reversing topological magnon phases. The gap magnitude and Chern numbers are directly governed by the PAM, enabling handedness-selective topology control. Applied to monolayer CrI3, and supported by symmetry analysis, our results establish driven lattice dynamics as a general route to engineering topological bosonic excitations and a versatile platform for Floquet control of magnetism.
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BibTeX
@misc{weißenhofer2026symmetryselective,
title = {{Symmetry-Selective Topological Magnon Engineering by Phonon Angular Momentum}},
author = {Markus Weißenhofer and Philipp Rieger and Chandan K. Singh and M. S. Mrudul and Sergiy Mankovsky and Peter M. Oppeneer},
howpublished = {arXiv},
year = {2026},
month = sep,
doi = {10.48550/arxiv.2605.28425},
eprint = {2605.28425},
archivePrefix = {arXiv},
url = {https://arxiv.org/abs/2605.28425},
note = {CC BY 4.0},
}
RIS
TY - UNPB
TI - Symmetry-Selective Topological Magnon Engineering by Phonon Angular Momentum
AU - Markus Weißenhofer
AU - Philipp Rieger
AU - Chandan K. Singh
AU - M. S. Mrudul
AU - Sergiy Mankovsky
AU - Peter M. Oppeneer
PY - 2026
DA - 2026/09/02
PB - arXiv
DO - 10.48550/arxiv.2605.28425
UR - https://arxiv.org/abs/2605.28425
AB - Dynamical control of Berry curvature remains an outstanding challenge in the engineering of topological phases. Here, we demonstrate control of magnon band structures via coherently driven phonons, based on \textit{ab initio} spin-lattice coupling and Floquet theory. We show that this control is symmetry selective: linearly polarized phonons leave the spectrum unchanged, whereas circular and elliptical phonons carrying finite phonon angular momentum (PAM) induce chiral interactions that open and tune gaps at Dirac points, generating and reversing topological magnon phases. The gap magnitude and Chern numbers are directly governed by the PAM, enabling handedness-selective topology control. Applied to monolayer CrI_3, and supported by symmetry analysis, our results establish driven lattice dynamics as a general route to engineering topological bosonic excitations and a versatile platform for Floquet control of magnetism.
ER -