Antiferromagnetic four-dimensional O(4) model
We study the phase diagram of the four-dimensional O(4) model with first- (β_(1)) and second- (β2) neighbor couplings, especially in the β_(2) < 0 region, where we find a line of transitions which seems to be second order. We also compute the critical exponents on this line at the point β_(1) = 0...
| Autores: | , , |
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| Tipo de recurso: | artículo |
| Fecha de publicación: | 1997 |
| País: | España |
| Institución: | Universidad Complutense de Madrid (UCM) |
| Repositorio: | Docta Complutense |
| Idioma: | inglés |
| OAI Identifier: | oai:docta.ucm.es:20.500.14352/60089 |
| Acceso en línea: | https://hdl.handle.net/20.500.14352/60089 |
| Access Level: | acceso abierto |
| Palabra clave: | 53 51-73 Stacked-triangular antiferromagnets Scalar-fermion model Phase-transitions Monte-Carlo Ising-model Triviality Systems Diagram. Física (Física) Física-Modelos matemáticos 22 Física |
| Sumario: | We study the phase diagram of the four-dimensional O(4) model with first- (β_(1)) and second- (β2) neighbor couplings, especially in the β_(2) < 0 region, where we find a line of transitions which seems to be second order. We also compute the critical exponents on this line at the point β_(1) = 0 (F_(4) lattice) by finite-size scaling techniques up to a lattice size of 24, these exponents being different from the mean-field ones. |
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