Weak first-order transition in the three-dimensional site-diluted Ising antiferromagnet in a magnetic field
We perform intensive numerical simulations of the three-dimensional site-diluted Ising antiferromagnet in a magnetic field at high values of the external applied field. Even if data for small lattice sizes are compatible with second-order criticality, the critical behavior of the system shows a cros...
| Autores: | , , , |
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| Tipo de recurso: | artículo |
| Fecha de publicación: | 2007 |
| País: | España |
| Institución: | Universidad Complutense de Madrid (UCM) |
| Repositorio: | Docta Complutense |
| Idioma: | inglés |
| OAI Identifier: | oai:docta.ucm.es:20.500.14352/52131 |
| Acceso en línea: | https://hdl.handle.net/20.500.14352/52131 |
| Access Level: | acceso abierto |
| Palabra clave: | 53 Critical-behavior 3 dimensions Monte-Carlo Phase-transitions Random-systems Model Universality. Física-Modelos matemáticos |
| Sumario: | We perform intensive numerical simulations of the three-dimensional site-diluted Ising antiferromagnet in a magnetic field at high values of the external applied field. Even if data for small lattice sizes are compatible with second-order criticality, the critical behavior of the system shows a crossover from second-order to first-order behavior for large system sizes, where signals of latent heat appear. We propose “apparent” critical exponents for the dependence of some observables on the lattice size for a generic disordered first-order phase transition. |
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