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MA: Fachverband Magnetismus
MA 40: Focus Session: Chiral phonons and crystals coupled to magnetic order II
Donnerstag, 12. März 2026, 09:30–12:45, HSZ/0002
Conventional magnetism arises from electron spin and orbital angular momentum, forming the basis of spintronics and orbitronics. Recent advances, however, have revealed that magnetism is also intimately linked to the chirality and angular momentum of the crystal lattice itself, often mediated by circular lattice vibrations known as chiral or axial phonons. These discoveries have uncovered novel mechanisms of spin and phonon transport and enabled direct access to phonon chirality and angular momentum as fundamental physical quantities. These developments prompt a re-examination of angular momentum coupling in solids, including well-established phenomena such as the Einstein-de Haas and Barnett effects, as well as the role of phonon angular momentum in the equilibrium state of magnetic materials. Chiral and axial phonons emerge as a powerful new platform for controlling magnetic order and dynamics, bridging lattice, spin, and angular momentum physics. This focus session aims to highlight recent breakthroughs in phonon angular momentum and magnetism and to connect the rapidly expanding field of chiral phononics with the broader magnetism community, spanning both experimental and theoretical perspectives.
As part of this focus session, we offer an excursion to the high-field THz user facilities at HZDR with an introduction to the planned Dresden Advanced Light Infrastructure (DALI). See MA 32 for details.
Organizers: Dominik Juraschek, d.m.juraschek@tue.nl; Michael Fechner, michael.fechner@mpsd.mpg.de; Sebastian Maehrlein, s.maehrlein@hzdr.de
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09:30 | MA 40.1 | Hauptvortrag: Magnetic order induced chiral phonons in a ferromagnetic Weyl semimetal — •Luyi Yang |
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10:00 | MA 40.2 | The effect of lattice vibrations on the Curie temperature — •Thorben Pürling and Stefan Blügel |
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10:15 | MA 40.3 | Universal phonon angular momentum Hall effect — •Daniel Bustamante Lopez, Verena Brehm, and Dominik Juraschek |
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10:30 | MA 40.4 | Phonon Angular Momentum Transfer Torque — •Verena Brehm, Daniel Bustamante Lopez, Shu Zhang, and Dominik Juraschek |
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10:45 | MA 40.5 | The phonomagnet: Spontaneous order of phonon angular momentum — •Maike Fahrensohn and Matthias Geilhufe |
| 11:00 | 15 min break | ||
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11:15 | MA 40.6 | Hauptvortrag: Thermal Hall Effects of Magnons and Phonons — •Alexander Mook |
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11:45 | MA 40.7 | Electrical conductivity from the axial phono-magnetic effect — •Natalia Shabala and Matthias Geilhufe |
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12:00 | MA 40.8 | Magnetic field induced pseudo angular momenta, chiral phonons, and anomalous EP interactions in some Weyl semimetals — Vladimir Gnezdilov, Florian Büscher, •Peter Lemmens, Angela Möller, Dirk Wulferding, Claudia Felser, and Chandra Shekar |
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12:15 | MA 40.9 | Phonon Polariton Hall Effect — •Omer Yaniv and Dominik Juarschek |
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12:30 | MA 40.10 | Phonon angular momentum in ultrafast demagnetization and hybrid quasiparticles — •Markus Weißenhofer, MS Mrudul, Philipp Rieger, Luca Mikadze, Ulrich Nowak, and Peter M. Oppeneer |