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https://ri.ufs.br/jspui/handle/riufs/472
Tipo de Documento: | Artigo |
Título: | Correlated electron systems on the Apollonian network |
Autor(es): | Souza, André Maurício Conceição de Herrmann, Hans Jürgen |
Data do documento: | Fev-2007 |
Abstract: | Strongly correlated electrons on an Apollonian network are studied using the Hubbard model. Ground-state and thermodynamic properties, including specific heat, magnetic susceptibility, spin-spin correlation function, double occupancy, and one-electron transfer, are evaluated applying direct diagonalization and quantum Monte Carlo techniques. In the strong-coupling limit, the quantum anisotropic spin-1∕2 Heisenberg model is used and the phase diagram is discussed using the renormalization group method. The results support an antiferromagnetic order with a metal-insulator transition for U∕t=11.1 at temperature T=0 and a tendency toward a nonordered phase in the half-filled Hubbard model for any U∕t. We also indicate that the spectral dimension must control the magnetic behavior on the Apollonian network. |
Palavras-chave: | Apollonian network Sistemas de elétrons fortemente correlacionados |
ISSN: | 1550-235X |
Instituição/Editora: | American Physical Society |
Citação: | SOUZA, A. M. C.; HERRMANN, Hans. Correlated electron systems on the Apollonian network. Physical Review B, New York, v. 75, n. 5, fev. 2007. Disponível em: <http://link.aps.org/doi/10.1103/PhysRevB.75.054412>. Acesso em: 18 abr. 2013. |
Licença: | © 2007 The American Physical Society |
URI: | https://ri.ufs.br/handle/riufs/472 |
Aparece nas coleções: | DFI - Artigos de periódicos |
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CorrelatedElectronSystems.pdf | 115,65 kB | Adobe PDF | ![]() Visualizar/Abrir |
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