Dresden 2020 – wissenschaftliches Programm

Die DPG-Frühjahrstagung in Dresden musste abgesagt werden! Lesen Sie mehr ...

Bereiche | Tage | Auswahl | Suche | Aktualisierungen | Downloads | Hilfe

MA: Fachverband Magnetismus

MA 29: Focus Session: Magnon Polarons – Magnon-Phonon Coupling and Spin Transport (joint session MA/HL)

MA 29.1: Hauptvortrag

Mittwoch, 18. März 2020, 09:30–10:00, HSZ 04

Magnon-polaron transport in magnetic insulators — •Benedetta Flebus — University of Texas at Austin, Austin, USA

In this talk, I will introduce the anomalous features in the magnetic field and temperature dependence of the spin Seebeck effect observed by Kikkawa et al. [PRL 117, 207203 (2016)] and explain how they can be interpreted as a signature of magnon-polaron transport.

Specifically, I will discuss how magnetoelastic coupling between magnetic moments and lattice vibrations in ferromagnets can gives rise to magnon-polarons, i.e., hybridized magnon and phonon modes. I will derive a Boltzmann transport theory for the mixed magnon-phonon modes and show that magnon-polaron formation can lead to transport anomalies when the disorder scattering in the magnetic and elastic subsystems is sufficiently different.

100% | Mobil-Ansicht | English Version | Kontakt/Impressum/Datenschutz
DPG-Physik > DPG-Verhandlungen > 2020 > Dresden