Berlin 2024 – wissenschaftliches Programm

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MA: Fachverband Magnetismus

MA 20: Poster I

MA 20.8: Poster

Dienstag, 19. März 2024, 16:30–19:00, Poster A

Magnon polarons in an easy-plane ferromagnet — •Konrad Scharff — KIT, Karlsruhe, Deutschland

When the dispersions of spin waves and acoustic phonons cross in energy-momentum space, they tend to hybridize in the presence of a magnetoelastic coupling [1] resulting in a magnon polaron. We study the emergence of magnon polarons in the ordered phase of an easy-plane ferromagnet on a hexagonal lattice. On the level of linear spin wave theory we determine the energy spectrum and evaluate the spin structure factor.

[1] Kittel, C. Interaction of spin waves and ultrasonic waves in ferromagnetic crystals. Phys. Rev. 110, 836*841 (1958).

Keywords: Magnetoelastic Coupling; Magnon polaron