Competing nematic interactions in a generalized XY model in two and three dimensions
dc.contributor.author | Canova, Gabriel Antônio | pt_BR |
dc.contributor.author | Levin, Yan | pt_BR |
dc.contributor.author | Arenzon, Jeferson Jacob | pt_BR |
dc.date.accessioned | 2016-12-31T02:21:33Z | pt_BR |
dc.date.issued | 2016 | pt_BR |
dc.identifier.issn | 1539-3755 | pt_BR |
dc.identifier.uri | http://hdl.handle.net/10183/150382 | pt_BR |
dc.description.abstract | We study a generalization of the XY model with an additional nematic-like term through extensive numerical simulations and finite-size techniques, both in two and three dimensions. While the original model favors local alignment, the extra term induces angles of 2π/q between neighboring spins. We focus here on the q = 8 case (while presenting new results for other values of q as well) whose phase diagram is much richer than the well-known q = 2 case. In particular, the model presents not only continuous, standard transitions between Berezinskii-Kosterlitz-Thouless (BKT) phases as in q = 2, but also infinite-order transitions involving intermediate, competition-driven phases absent for q = 2 and 3. Besides presenting multiple transitions, our results show that having vortices decoupling at a transition is not a sufficient condition for it to be of BKT type. | en |
dc.format.mimetype | application/pdf | pt_BR |
dc.language.iso | eng | pt_BR |
dc.relation.ispartof | Physical review. E, Statistical, nonlinear, and soft matter physics. Melville. Vol. 94, no. 3 (Sept. 2016), 032140, 12 p. | pt_BR |
dc.rights | Open Access | en |
dc.subject | Modelo x-y | pt_BR |
dc.subject | Diagramas de fase | pt_BR |
dc.subject | Transições magnéticas | pt_BR |
dc.title | Competing nematic interactions in a generalized XY model in two and three dimensions | pt_BR |
dc.type | Artigo de periódico | pt_BR |
dc.identifier.nrb | 001008472 | pt_BR |
dc.type.origin | Estrangeiro | pt_BR |
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