dc.contributor.author
Behovits, Yannic
dc.contributor.author
Chekhov, Alexander L.
dc.contributor.author
Bodnar, S. Yu.
dc.contributor.author
Gueckstock, Oliver
dc.contributor.author
Reimers, S.
dc.contributor.author
Lytvynenko, Y.
dc.contributor.author
Skourski, Y.
dc.contributor.author
Wolf, M.
dc.contributor.author
Seifert, Tom S.
dc.contributor.author
Kampfrath, Tobias
dc.date.accessioned
2023-10-10T13:02:51Z
dc.date.available
2023-10-10T13:02:51Z
dc.identifier.uri
https://refubium.fu-berlin.de/handle/fub188/41070
dc.identifier.uri
http://dx.doi.org/10.17169/refubium-40791
dc.description.abstract
Antiferromagnets have large potential for ultrafast coherent switching of magnetic order with minimum heat dissipation. In materials such as Mn2Au and CuMnAs, electric rather than magnetic fields may control antiferromagnetic order by Néel spin-orbit torques (NSOTs). However, these torques have not yet been observed on ultrafast time scales. Here, we excite Mn2Au thin films with phase-locked single-cycle terahertz electromagnetic pulses and monitor the spin response with femtosecond magneto-optic probes. We observe signals whose symmetry, dynamics, terahertz-field scaling and dependence on sample structure are fully consistent with a uniform in-plane antiferromagnetic magnon driven by field-like terahertz NSOTs with a torkance of (150 ± 50) cm2 A−1 s−1. At incident terahertz electric fields above 500 kV cm−1, we find pronounced nonlinear dynamics with massive Néel-vector deflections by as much as 30°. Our data are in excellent agreement with a micromagnetic model. It indicates that fully coherent Néel-vector switching by 90° within 1 ps is within close reach.
en
dc.format.extent
10 Seiten
dc.rights.uri
https://creativecommons.org/licenses/by/4.0/
dc.subject
Magnetic properties
en
dc.subject
Magnetic materials
en
dc.subject.ddc
500 Naturwissenschaften und Mathematik::530 Physik::530 Physik
dc.title
Terahertz Néel spin-orbit torques drive nonlinear magnon dynamics in antiferromagnetic Mn2Au
dc.type
Wissenschaftlicher Artikel
dcterms.bibliographicCitation.articlenumber
6038
dcterms.bibliographicCitation.doi
10.1038/s41467-023-41569-z
dcterms.bibliographicCitation.journaltitle
Nature Communications
dcterms.bibliographicCitation.volume
14
dcterms.bibliographicCitation.url
https://doi.org/10.1038/s41467-023-41569-z
refubium.affiliation
Physik
refubium.funding
Springer Nature DEAL
refubium.note.author
Die Publikation wurde aus Open Access Publikationsgeldern der Freien Universität Berlin gefördert.
refubium.resourceType.isindependentpub
no
dcterms.accessRights.openaire
open access
dcterms.isPartOf.eissn
2041-1723