Dresden 2017 – wissenschaftliches Programm

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PV: Plenarvorträge

PV XVIII

PV XVIII: Preisträgervortrag

Mittwoch, 22. März 2017, 15:00–15:30, HSZ 04

Magnon transport in spin textures — •Helmut Schultheiß — Helmholtz-Zentrum Dresden-Rossendorf, Institute of Ion Beam Physics and Materials Research, Bautzner Landstrasse 400, 01328 Dresden, Germany --- Laureate of the Walter-Schottky-Prize

One of the grand challenges in cutting edge quantum and condensed matter physics is to harness the spin degree of electrons for information technologies. While spintronics, based on charge transport by spin polarized electrons, made its leap in data storage by providing extremely sensitive detectors in magnetic hard-drives, it turned out to be challenging to transport spin information without great losses. With magnonics a visionary concept emerged: Utilize magnons - the excitation quanta of the spin system in magnetically ordered materials - as carriers for information. Magnons are waves of the electrons* spin precessional motion. They propagate without charge transport and its associated Ohmic losses, paving the way for a substantial reduction of energy consumption in devices. In this presentation, I will present our recent highlights on magnon propagation and manipulation in non-collinear spin textures. In particular, I will outline how magnons can be steered in magnetic microstructures by locally generated magnetic fields [1] and how magnetic domain walls serve as magnon nanochannels [2].

[1] K. Vogt, et al., Nature Comms. 5, 3727 (2014).

[2] K. Wagner, et al., Nature Nanotech. 11, 432 (2016).