August 30, 2021 to September 3, 2021
University of Innsbruck
Europe/Zurich timezone

【107】Non-thermal generation of a new metastable skyrmion phase in Cu2OSeO3

Aug 31, 2021, 3:00 PM
Room A

Room A

Talk Condensed Matter Physics (KOND) Condensed Matter Physics


Alexey Sapozhnik (EPFL - EPF Lausanne)


Metastable skyrmions with long lifetimes are attractive for various applications. However, the physics behind the non-equilibrium topological phases is far from being fully understood. We report the creation of a new hidden skyrmion phase in a Cu2OSeO3 lamella achieved by femtosecond laser excitation of the material at 5 K and a magnetic field of 15 mT. The formation of the skyrmion lattice was confirmed by Lorentz-TEM. Since this small magnetic field is below the equilibrium skyrmion pocket of our lamella, the generation of skyrmions cannot be explained by transient heating of the sample through the equilibrium skyrmion pocket. Thus, non-thermal mechanisms are involved in the skyrmion photocreation process in Cu2OSeO3.

Primary authors

Alexey Sapozhnik (EPFL - EPF Lausanne) Benoit Truc (EPFL) Phoebe Tengdin (École Polytechnique Fédérale de Lausanne) Thomas Schönenberger Ping Che (École polytechnique fédérale de Lausanne) Ivan Madan (EPFL) Dr Thomas LaGrange (EPFL) Henrik Ronnow (EPFL - EPF Lausanne) Fabrizio Carbone (EPFL)

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