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  Light-Induced Metastable Hidden Skyrmion Phase in the Mott Insulator Cu2OSeO3

Truc, B., Sapozhnik, A. A., Tengdin, P., Viñas Boström, E., Schönenberger, T., Gargiulo, S., et al. (2023). Light-Induced Metastable Hidden Skyrmion Phase in the Mott Insulator Cu2OSeO3. Advanced Materials, 35(33): 2304197. doi:10.1002/adma.202304197.

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https://arxiv.org/abs/2212.07878 (Preprint)
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 Creators:
Truc, B.1, Author
Sapozhnik, A. A.1, Author
Tengdin, P.1, Author
Viñas Boström, E.2, Author           
Schönenberger, T.3, Author
Gargiulo, S.1, Author
Madan, I.1, Author
LaGrange, T.1, Author
Magrez, A.4, Author
Verdozzi, C.5, Author
Rubio, A.2, 6, Author           
Rønnow, H. M.3, Author
Carbone, F.1, Author
Affiliations:
1Laboratory for Ultrafast Microscopy and Electron Scattering, Institute of Physics, École Polytechnique Fédérale de Lausanne, ou_persistent22              
2Theory Group, Theory Department, Max Planck Institute for the Structure and Dynamics of Matter, Max Planck Society, ou_2266715              
3Laboratory for Quantum Magnetism, Institute of Physics, École Polytechnique Fédérale de Lausanne, ou_persistent22              
4Crystal Growth Facility, Institute of Physics, École Polytechnique Fédérale de Lausanne, ou_persistent22              
5Division of Mathematical Physics and ETSF, Lund University, ou_persistent22              
6Center for Computational Quantum Physics (CCQ), The Flatiron Institute, ou_persistent22              

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 Abstract: The discovery of a novel long-lived metastable skyrmion phase in the multiferroic insulator Cu2OSeO3 visualized with Lorentz transmission electron microscopy for magnetic fields below the equilibrium skyrmion pocket is reported. This phase can be accessed by exciting the sample non-adiabatically with near-infrared femtosecond laser pulses and cannot be reached by any conventional field-cooling protocol, referred as a hidden phase. From the strong wavelength dependence of the photocreation process and via spin-dynamics simulations, the magnetoelastic effect is identified as the most likely photocreation mechanism. This effect results in a transient modification of the magnetic free energy landscape extending the equilibrium skyrmion pocket to lower magnetic fields. The evolution of the photoinduced phase is monitored for over 15 min and no decay is found. Because such a time is much longer than the duration of any transient effect induced by a laser pulse in a material, it is assumed that the newly discovered skyrmion state is stable for practical purposes, thus breaking ground for a novel approach to control magnetic state on demand at ultrafast timescales and drastically reducing heat dissipation relevant for next-generation spintronic devices.

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Language(s): eng - English
 Dates: 2023-05-052023-06-062023-08-17
 Publication Status: Issued
 Pages: -
 Publishing info: -
 Table of Contents: -
 Rev. Type: Peer
 Identifiers: DOI: 10.1002/adma.202304197
arXiv: 2212.07878
 Degree: -

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Grant ID : 101106809
Funding program : Horizon 2020 (H2020)
Funding organization : European Commission (EC)
Project name : B.T., A.A.S., and P.T. contributed equally to this work. The authors acknowledge support from the ERC consolidator grant ISCQuM No 771346, SNSF via sinergia nanoskyrmionics grant 171003, funding from the European Union's Horizon Europe research and innovation programme under the Marie Skłodowska-Curie grant agreement No 101106809, the Max Planck Institute New York City Center for Non-Equilibrium Quantum Phenomena, the Cluster of Excellence 'CUI: Advanced Imaging of Matter'- EXC 2056 - project ID 390715994 and SFB-925 "Light induced dynamics and control of correlated quantum systems" – project 170620586 of the Deutsche Forschungsgemeinschaft (DFG), and Grupos Consolidados (IT1453-22), the Max Planck-New York City Center for Non-Equilibrium Quantum Phenomena, Google Inc., and the Swedish Research Council VR 2022 04486. The Flatiron Institute is a division of the Simons Foundation. The authors would like to gratefully acknowledge Prof. A. Rosch, Dr. N. del Ser, and Prof. J. Zang for helpful discussions and the comments related the theory part of the manuscript. Open access funding provided by Ecole Polytechnique Federale de Lausanne.
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Title: Advanced Materials
  Other : Adv. Mater.
Source Genre: Journal
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Publ. Info: Weinheim : Wiley-VCH
Pages: - Volume / Issue: 35 (33) Sequence Number: 2304197 Start / End Page: - Identifier: ISSN: 0935-9648
CoNE: https://pure.mpg.de/cone/journals/resource/954925570855