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http://hdl.handle.net/10183/103611
Título | Fluctuation-induced first-order transitions in systems with spatially isotropic competing interactions |
Autor |
Barbosa, Marcia Cristina Bernardes
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Abstract | We consider a spin system with competing interactions that are isotropic with respect to the axes of a cubic lattice. In the mean-field approximation the model supports paramagnetic, ferromagnetic, and modulated phases separated by a Lifshitz point. The character of this point is investigated in the presence of fluctuations. Using a standard diagrammatic formalism, we find that the paramodulated phase transition should be fi.rst order and that the Lifshitz point should be a criticai endpoint. |
Contido em | Physical review. B, Condensed matter. New York. Vol. 46, n. 6 (Aug. 1992), p. 3672-3675 |
Assunto |
Fisica da materia condensada
Transformações de fase Transformações de fase |
Origem | Estrangeiro |
Tipo | Artigo de periódico |
URI | http://hdl.handle.net/10183/103611 |
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000056068.pdf (575.1Kb) | Texto completo (inglês) | Adobe PDF | Visualizar/abrir |
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