@article{384caff4595d42fead5c845455283ade,
title = "Current-driven nucleation and propagation of antiferromagnetic skyrmionium",
abstract = "We present a theoretical study on nucleation and propagation of antiferromagnetic skyrmionium induced by spin current injection. A skyrmionium, also known as 2π skyrmion, is a vortexlike magnetic structure characterized by a topological charge, the so-called skyrmion number, being zero. We find that an antiferromagnetic skyrmionium can be generated via a local injection of spin current with toroidal distribution. We examine the threshold current density for successful skyrmionium nucleation and the robustness of the proposed mechanism against thermal fluctuation. A spatially uniform spin current is then demonstrated to induce propagation of the skyrmionium. We derive an expression for the skyrmionium velocity based on a collective-coordinate model, which agrees well with our numerical results.",
author = "Obadero, {S. A.} and Y. Yamane and Akosa, {C. A.} and G. Tatara",
note = "Funding Information: This research was supported by Research Fellowship for Young Scientists (No. 17J03368) from Japan Society for the Promotion of Science (JSPS), Grants-in-Aid for Scientific Research (B) (No. 17H02929) from JSPS, and Grants-in-Aid for Scientific Research on Innovative Areas (No. 26103006) from the Ministry of Education, Culture, Sports, Science and Technology (MEXT), Japan. S.A.O acknowledges the scholarship from the World Bank through the African Centers of excellent Project; the Pan-African Material Institute (PAMI) with Grant No. P126974, within the African University of Science and Technology (AUST). Publisher Copyright: {\textcopyright} 2020 American Physical Society. ",
year = "2020",
month = jul,
day = "1",
doi = "10.1103/PhysRevB.102.014458",
language = "English",
volume = "102",
journal = "Physical Review B",
issn = "2469-9950",
publisher = "American Physical Society",
number = "1",
}