Browsing Artigos by Subject "Vortices"

Browsing Artigos by Subject "Vortices"

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  • Carvalho-Santos, V.L.; Apolonio, F.A.; Oliveira-Neto, N.M. (Physics Letters A, 2013-08-01)
    We study the Heisenberg model on cylindrically symmetric curved surfaces. Two kinds of excitations are considered. The first is given by the isotropic regime, yielding the sine-Gordon equation and π solitons are predicted. ...
  • Carvalho-Santos, V. L.; Elias, R. G.; Altbir, D.; Fonseca, J. M. (Journal of Magnetism and Magnetic Materials, 2015-10-01)
    We study the stability and energetics associated to skyrmions appearing as excitations on curved surfaces. Using a continuum model we show that the presence of cylindrically radial and azimuthal fields destabilize the ...
  • Fonseca, Jakson M.; Vilas-Boas, Priscila S. C.; Elias, Ricardo G.; Altbir, Dora; Carvalho-Santos, Vagson L. (Physics Letters A, 2015-01-02)
    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, ...

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