Dresden 2026 – wissenschaftliches Programm

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MA: Fachverband Magnetismus

MA 40: Focus Session: Chiral phonons and crystals coupled to magnetic order II

MA 40.7: Vortrag

Donnerstag, 12. März 2026, 11:45–12:00, HSZ/0002

Electrical conductivity from the axial phono-magnetic effect — •Natalia Shabala and Matthias Geilhufe — Department of Physics, Chalmers University of Technology, 412 96 Gothenburg, Sweden

Axial, or circularly polarized phonons, are characterized by the collective vibrations of atoms in circular patterns. These phonons have been shown to induce large magnetization in a phenomenon referred to as the phono-magnetic effect [1,2]. The mechanism behind this effect is believed to be the electron-phonon interaction. In combination with circular polarization of phonons this interaction leads to the time-reversal symmetry breaking and causes splitting of electronic energy levels. In this work, we aim to study the effect of this splitting on other physical phenomena. In particular, we are interested in the electrical conductivity, which can be studied through the Hubbard model. Additionally, we investigate whether the time-reversal symmetry breaking leads to the emergence of the anomalous Hall effect, as can be expected in 2D materials.

[1] N. Shabala, and R. M. Geilhufe, Phys. Rev. Lett. 133.26 (2024): 266702

[2] N. Shabala, F. Tietjen, R. M. Geilhufe, arXiv:2511.03329 (2025)

Keywords: Axial phonons; Circularly-polarized phonons; Magnetism; Electron-phonon coupling; Phono-magnetic effects