Regensburg 2025 – scientific programme

Parts | Days | Selection | Search | Updates | Downloads | Help

MA: Fachverband Magnetismus

MA 5: Focus Session: Magnetic Phenomena from Phonon Chirality and Angular Momentum I (joint session MA/TT)

MA 5.2: Invited Talk

Monday, March 17, 2025, 10:00–10:30, H20

Chiral phonons, phono-magnetism, and spin-rotation coupling — •Matthias Geilhufe — Department of Physics, Chalmers University of Technology, 412 96 Göteborg, Sweden

High-intensity THz lasers enable the coherent excitation of individual phonon modes. The ultrafast control of emergent magnetism through phonons and phonon angular momentum opens new avenues for tuning functional materials. Recent experiments suggest a substantial magnetization in various materials [1,2], presenting a challenge for theoretical modeling. I will provide an introduction to magnetization induced by phonon angular momentum via the phonon inverse Faraday effect [3]. Additionally, I will discuss a coupling mechanism based on inertial effects, which facilitates the interaction between rotational degrees of freedom and electron spin [4].

[1] Basini et al., Nature, 628, 534 (2024)

[2] Davies et al., Nature, 628, 540 (2024)

[3] Shabala, Geilhufe, Physical Review Letters, arXiv:2405.09538

[4] Geilhufe, Physical Review Research, 4, L012004 (2022)

Keywords: Chiral Phonons; Axial Phonons; Phonon angular momentum; Inertial effects; Magnetism