Dresden 2026 – scientific programme
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MA: Fachverband Magnetismus
MA 14: PhD Focus Session: What about the lattice? Lessons from (ultrafast) magnetism
MA 14.3: Invited Talk
Tuesday, March 10, 2026, 10:50–11:20, HSZ/0002
Angular momentum transfer and chiral phonons from first principles — •Markus Weißenhofer1, Philipp Rieger1, MS Mrudul1, Luca Mikadze1, Sergiy Mankovsky2, Svitlana Polesya2, Hubert Ebert2, Ulrich Nowak3, and Peter M. Oppeneer1 — 1Uppsala University, Uppsala, Sweden — 2Ludwig Maximilian Universität, München, Germany — 3Universität Konstanz, Konstanz, Germany
Transfer and manipulation of angular momentum is a key aspect in spintronics. Recently, it has been shown that angular momentum transfer between spins and lattice is possible on ultrashort timescales [1]. To contribute to the understanding of this transfer, we have developed a theoretical multiscale framework for spin-lattice coupling, which is linked to ab-initio calculations on the one hand and magnetoelastic continuum theory on the other [2], allowing for the study of a wide range of magnetomechanical phenomena. Here I will demonstrate how this framework can be used to calculate magnon-phonon coupling parameters, emphasizing the importance of a Dzyaloshiskii-Moriya type interaction for angular momentum transfer [2] and revealing the existence of chiral phonons in iron arising from a chirality-selective coupling [3].
[1] Tauchert al., Nature 602, 73 (2022); Luo et al., Science 382, 698 (2023). [2] Mankovsky et al., PRL 129, 067202 (2022); Weißenhofer et al., PRB 108, L060404 (2023). [3] Weißenhofer et al., PRL 135, 216701(2025).
Keywords: Spin-lattice coupling; Angular momentum transfer; Phonon angular momentum; Chiral Phonons; Magnon-phonon hybridization