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MA: Fachverband Magnetismus
MA 25: Focus Session: Chiral phonons and crystals coupled to magnetic order I
Mittwoch, 11. 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 25.1 | Hauptvortrag: Coherent phononic control of chirality — •Michael Först |
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10:00 | MA 25.2 | Hauptvortrag: Towards a modern theory of chiralization (and can chiral phonons help us get there?) — •Nicola Spaldin |
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10:30 | MA 25.3 | Coherent Transfer of Pseudo- and Real Angular Momentum via Lattice Anharmonicity — •Olga Minakova, Carolina Paiva, Maximilian Frenzel, Michael Spencer, Joanna Urban, Martin Wolf, Dominik Juraschek, and Sebastian Maehrlein |
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10:45 | MA 25.4 | Rotational Umklapp scattering in chiral nonlinear phononics — •Yu-Chi Huang, Carolina Paiva, and Dominik Juraschek |
| 11:00 | 15 min break | ||
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11:15 | MA 25.5 | Hauptvortrag: Observation and control of chiral phonons in non-centrosymmetric materials — •Hiroki Ueda |
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11:45 | MA 25.6 | Associated magnetism of circular ionic motion probed with ultrafast x-ray pulses — •Clifford Allington, Matthew Lutz, E. Ho, F. Graf, M. Basini, H. Ueda, A. Elliot, M. Biggs, R. Finn, S-W Huang, M. Grimes, M. Henstridge, M. Hoffmann, R. Alonso-Mori, D. Zhu, Q. Nguyen, V. Esposito, T. Sato, E. Skoropota, E. Paris, A. Camps, E. Razzoli, R. Mankowsky, F. Capotondi, N. Jaouen, M. Radovic, M. Savoini, E. Abreu, S. Johnson, Jeremy Johnson, and Urs Staub |
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12:00 | MA 25.7 | Real-time laser-driven (chiral) phonon dynamics from atomistic simulations — •Mike Pols and Nicola A. Spaldin |
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12:15 | MA 25.8 | THz field-induced magnetic-like response in the quantum paraelectric diamagnet KTaO3 — •Christelle Kadlec, Filip Kadlec, Dalibor Repček, Martina Basini, Petr Kužel, Jan-Christoph Deinert, Sergey Kovalev, Mattia Udina, Igor Ilyakov, Alexey Ponomaryov, and Stanislav Kamba |
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12:30 | MA 25.9 | Phonon-induced chirality — •Dominik Juraschek |