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SKM 2021 – wissenschaftliches Programm

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MA: Fachverband Magnetismus

MA 2: Focus Session: Magnon Polarons - Magnon-Phonon Coupling and Spin Transport (joint session MA/HL)

Montag, 27. September 2021, 13:30–17:00, H5

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 to study MP transport, e.g. by spin Seebeck effect and nonlocal spin transport, as well as the investigation of MPs in 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)

13:30 MA 2.1 Hauptvortrag: Magnon-polarons in magnetic insulators — •Benedetta Flebus
14:00 MA 2.2 Hauptvortrag: Spin-phonon coupling in non-local spin transport through magnetic insulators — •Rembert Duine
14:30 MA 2.3 Hauptvortrag: Double accumulation and anisotropic transport of magneto-elastic bosons in yttrium iron garnet films — •Alexander A. Serga
15:00 MA 2.4 enhancement of the spin seebeck effect by magnon-phonon resonance in a partially compensated magnet — •R. Ramos, T. Hioki, Y. Hashimoto, T. Kikkawa, P. Frey, A.J.E. Kreil, V.I. Vasyuchka, A.A. Serga, B. Hillebrands, and E. Saitoh
15:15 MA 2.5 Hauptvortrag: Magnon polarons and the low-temperature spin-Seebeck effect — •Piet Brouwer and Rico Schmidt
15:45 MA 2.6 Hauptvortrag: Magnon-Polarons in different flavors: (anti)ferromagnetic to topological — •Akashdeep Kamra
16:15 MA 2.7 Hauptvortrag: Magnon polarons in antiferromagnetic insulator Cr2O3 — •Jing Shi
16:45 MA 2.8 Revealing thermally driven distortion of magnon dispersion by spin Seebeck effect in Gd3Fe5O12 — •Bin Yang, Si Yu Xia, Hui Zhao, Gan Liu, Jun Du, Ka Shen, Zhiyong Qiu, and Di Wu
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