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)

Mittwoch, 18. März 2020, 09:30–13:00, HSZ 04

The coupling of spin waves and atomic lattice vibrations in solid magnetic states, so-called magnon polarons (MPs), can have large impact on spin transport properties as recently explored for spin-Seebeck effect, spin pumping and nonlocal spin transport. This resonant enhancement can be reached when the magnon dispersion is shifted by a magnetic field and crosses the phonon dispersion with sufficient overlap. While initially observed at low temperatures and large magnetic fields, further material and device developments have led to MPs at room temperature and moderate magnetic fields. Thus, MPs become important for the manipulation and amplification of spin currents in spintronic and spin caloritronic devices, e.g. by carrying the spins much further than using uncoupled magnons. This focus session highlights the main important research outcomes for MPs, state-of-the-art techniques to detect MPs, such as Brillouin light scattering and neutron scattering, and to study MP transport, e.g. by spin Seebeck effect and nonlocal spin transport, as well as the investigation of MPsin different material classes such as garnets, ferrites and antiferromagnets. In addition, the excessive theoretical work on MPs performed recently is addressed in this focus session.

Organizer: Timo Kuschel (Bielefeld University)

09:30 MA 29.1 Hauptvortrag: Magnon-polaron transport in magnetic insulators — •Benedetta Flebus
10:00 MA 29.2 Hauptvortrag: Spin-phonon coupling in non-local spin transport through magnetic insulators — •Rembert Duine
10:30 MA 29.3 Hauptvortrag: Anisotropic transport of spontaneously accumulated magneto-elastic bosons in yttrium iron garnet films — •Alexander A. Serga
11:00 MA 29.4 Formation of magnon polarons in ferromagnetic nanogratings — •Felix Godejohann, Alexey Scherbakov, Serhii Kukhtaruk, Alexander Poddubny, Dmytro Yaremkevych, Mu Wang, Achim Nadzeyka, Dmitri Yakovlev, Andrew Rushforth, Andrey Akimov, and Manfred Bayer
11:15 MA 29.5 Hauptvortrag: Boltzmann approach to the longitudinal spin Seebeck effectPiet Brouwer and •Rico Schmidt
11:45 MA 29.6 Hauptvortrag: Magnon-polaron excitations in the noncollinear antiferromagnet Mn3Ge — •Aleksandr Sukhanov
12:15 MA 29.7 Hauptvortrag: Magnon-Polarons in different flavors: (anti)ferromagnetic to topological — •Akashdeep Kamra
12:45 MA 29.8 Topological Magnon-Phonon Hybrid Excitations in Two-Dimensional Ferromagnets with Tunable Chern Numbers — •Gyungchoon Go, Se Kwon Kim, and Kyung-Jin Lee
100% | Mobil-Ansicht | English Version | Kontakt/Impressum/Datenschutz
DPG-Physik > DPG-Verhandlungen > 2020 > Dresden