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https://locus.ufv.br//handle/123456789/21545
Tipo: | Artigo |
Título: | On geometry-dependent vortex stability and topological spin excitations on curved surfaces with cylindrical symmetry |
Autor(es): | Carvalho-Santos, V.L. Apolonio, F.A. Oliveira-Neto, N.M. |
Abstract: | 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. The second one is given by the XY model, leading to a vortex turning around the surface. Helical states are also considered, however, topological arguments cannot be used to ensure its stability. The energy and the anisotropy parameter which stabilizes the vortex state are explicitly calculated for two surfaces: catenoid and hyperboloid. The results show that the anisotropy and the vortex energy depends on the underlying geometry. |
Palavras-chave: | Classical spin models Solitons Vortices Curvature Heisenberg model |
Editor: | Physics Letters A |
Tipo de Acesso: | Elsevier B.V. |
URI: | https://doi.org/10.1016/j.physleta.2013.03.028 http://www.locus.ufv.br/handle/123456789/21545 |
Data do documento: | 1-Ago-2013 |
Aparece nas coleções: | Artigos |
Arquivos associados a este item:
Arquivo | Descrição | Tamanho | Formato | |
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artigo.pdf Until 2100-12-31 | Texto completo | 638,45 kB | Adobe PDF | Visualizar/Abrir ACESSO RESTRITO |
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