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research article

Imaging the Ultrafast Coherent Control of a Skyrmion Crystal

Tengdin, Phoebe
•
Truc, Benoit
•
Sapozhnik, Alexey
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December 20, 2022
Physical Review X

Exotic magnetic textures emerging from the subtle interplay between thermodynamic and topological fluctuation have attracted intense interest due to their potential applications in spintronic devices. Recent advances in electron microscopy enable the imaging of random photogenerated individual skyrmions. However, their deterministic and dynamical manipulation is hampered by the chaotic nature of such fluctuations and the intrinsically irreversible switching between different minima in the magnetic energy landscape. Here, we demonstrate a method to coherently control the rotation of a skyrmion crystal by discrete amounts at speeds which are much faster than previously observed. By employing circularly polarized femtosecond laser pulses with an energy below the band gap of the Mott insulator Cu2OSeO3, we excite a collective magnon mode via the inverse Faraday effect. This triggers coherent magnetic oscillations that directly control the rotation of a skyrmion crystal imaged by cryo-Lorentz transmission electron microscopy. The manipulation of topological order via ultrafast laser pulses shown here can be used to engineer fast spin-based logical devices.

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Type
research article
DOI
10.1103/PhysRevX.12.041030
Author(s)
Tengdin, Phoebe
•
Truc, Benoit
•
Sapozhnik, Alexey
•
Kong, Lingyao
•
del Ser, Nina
•
Gargiulo, Simone
•
Madan, Ivan
•
Schönenberger, Thomas
•
Baral, Priya R.
•
Che, Ping
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Date Issued

2022-12-20

Published in
Physical Review X
Volume

12

Issue

4

Article Number

041030

Subjects

skyrmion

•

transmission electron microscopy

•

ultrafast laser

•

spin precession

•

chiral magnet

•

skyrmionics

•

spintronic

Peer reviewed

REVIEWED

Written at

EPFL

EPFL units
LMGN  
LQM  
IPHYS-CGCP  
FunderGrant Number

FNS

171003

EU funding

ISCQuM

H2020

964591

Available on Infoscience
December 22, 2022
Use this identifier to reference this record
https://infoscience.epfl.ch/handle/20.500.14299/193497
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