Control of the Bose-Einstein Condensation of Magnons by the Spin Hall Effect

Autor(en)

Michael Schneider, David Breitbach, Rostyslav O. Serha, Qi Wang, Alexander A. Serga, Andrei N. Slavin, Vasyl S. Tiberkevich, Björn Heinz, Bert Lägel, Thomas Brächer, Carsten Dubs, Sebastian Knauer, Oleksandr Dobrovolskiy, Philipp Pirro, Burkard Hillebrands, Andrii Chumak

Abstrakt

Previously, it has been shown that rapid cooling of yttrium-iron-garnet-platinum nanostructures, preheated by an electric current sent through the Pt layer, leads to overpopulation of a magnon gas and to subsequent formation of a Bose-Einstein condensate (BEC) of magnons. The spin Hall effect (SHE), which creates a spin-polarized current in the Pt layer, can inject or annihilate magnons depending on the electric current and applied field orientations. Here we demonstrate that the injection or annihilation of magnons via the SHE can prevent or promote the formation of a rapid cooling-induced magnon BEC. Depending on the current polarity, a change in the BEC threshold of -8% and thorn 6% was detected. These findings demonstrate a new method to control macroscopic quantum states, paving the way for their application in spintronic devices.

Organisation(en)

Nanomagnetismus und Magnonik

Externe Organisation(en)

Technische Universität Kaiserslautern, Oakland University, Innovent e.V. Technologieentwicklung Jena

Journal

Physical Review Letters

Band

127

Anzahl der Seiten

7

ISSN

0031-9007

DOI

https://doi.org/10.1103/PhysRevLett.127.237203

Publikationsdatum

12-2021

Peer-reviewed

Ja

ÖFOS 2012

103025 Quantenmechanik, 103017 Magnetismus

Schlagwörter

ASJC Scopus Sachgebiete

Allgemeine Physik und Astronomie

Link zum Portal

https://ucrisportal.univie.ac.at/de/publications/709ca3c8-7881-4aa0-9327-697ace6ce6ec