Topological magnetic solitons on a paraboloidal shell

• Autor(a) principal: Fonseca, Jakson M.
• Data de Publicação: 2015
• Outros Autores: Vilas-Boas, Priscila S. C., Elias, Ricardo G., Altbir, Dora, Carvalho-Santos, Vagson L.
• Tipo de documento: Artigo
• Idioma: eng
• Título da fonte: LOCUS Repositório Institucional da UFV
• Texto Completo: https://doi.org/10.1016/j.physleta.2014.10.025; http://www.locus.ufv.br/handle/123456789/22230
• topic: Classical spin models; Solitons; Vortices; Curvature; Heisenberg model

We study the influence of curvature on the exchange energy of skyrmions and vortices on a paraboloidal surface. It is shown that such structures appear as excitations of the Heisenberg model, presenting topological stability, unlike what happens on other simply-connected geometries such as pseudospheres. We also show that the skyrmion width depends on the geometrical parameters of the paraboloid. The presence of a magnetic field leads to the appearance of 2π-skyrmions, introducing a new characteristic length into the system. Regarding vortices, the geometrical parameters of the paraboloid play an important role in the exchange energy of this excitation.