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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
1

Soluções tipo-vórtice de spins na fita de Möbius / Spin vortex-like solutions on a Möbius Strip

Freitas, Walter de Andrade 31 March 2009 (has links)
Made available in DSpace on 2015-03-26T13:35:11Z (GMT). No. of bitstreams: 1 texto completo.pdf: 4826591 bytes, checksum: e6e04e044c68d4c03a9c4e303f7417fd (MD5) Previous issue date: 2009-03-31 / Coordenação de Aperfeiçoamento de Pessoal de Nível Superior / We consider the classical version of the Heisenberg exchange model on the surface of a Möbius strip. Vortex- like excitations, carrying non-trivial charge (topological winding number), are shown to emerge as static solutions in the planar rotator regime. Besides such a charge, attention is also paid to discuss about its energetics. / O modelo de Heisenberg, descrevendo a interação de troca entre spins clássicos, é investigado na superfície da fita de Möbius. Excitações do tipo-vórtice, caracterizadas por cargas topológicas não-triviais, são estudadas como soluções estáticas no regime de rotor planar. Além da carga, discute- se também a energética associada a tal solução.

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