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Thermal generation of droplet soliton in chiral magnet
Forschungszentrum Jülich and JARA, Germany;RWTH Aachen University, Germany.
University of Iceland, Iceland;ITMO University, Russia;Örebro University, Sweden.ORCID iD: 0000-0003-3351-7172
Forschungszentrum Jülich and JARA, Germany.
2022 (English)In: Physical Review B, ISSN 2469-9950, E-ISSN 2469-9969, Vol. 105, no 18, article id 184403Article in journal (Refereed) Published
Abstract [en]

Controlled creation of localized magnetic textures beyond conventional π-skyrmions is an important problem in the field of magnetism. Here, by means of spin dynamics simulations, Monte Carlo simulations, and harmonic transition state theory we demonstrate that an elementary chiral magnetic soliton with zero topological charge - the chiral droplet - can be created by thermal fluctuations in the presence of the tilted magnetic field. The proposed protocol relies on an unusual kinetics combining the effects of the entropic stabilization and low-energy barrier for the nucleation of a topologically trivial state. Following this protocol by varying temperature and the tilt of the external magnetic field, one can selectively generate chiral droplets or π-skyrmions in a single system. The coexistence of two distinct magnetic solitons establishes a basis for a rich magnetization dynamics and opens up the possibility for the construction of more complex magnetic textures such as skyrmion bags and skyrmions with chiral kinks. 

Place, publisher, year, edition, pages
American Physical Society, 2022. Vol. 105, no 18, article id 184403
National Category
Condensed Matter Physics
Research subject
Physics, Condensed Matter Physics
Identifiers
URN: urn:nbn:se:lnu:diva-116377DOI: 10.1103/PhysRevB.105.184403ISI: 000804706000002Scopus ID: 2-s2.0-85130354992OAI: oai:DiVA.org:lnu-116377DiVA, id: diva2:1697317
Available from: 2022-09-20 Created: 2022-09-20 Last updated: 2022-09-23Bibliographically approved

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Bessarab, Pavel F.

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