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https://repositorio.ufba.br/handle/ri/7976
metadata.dc.type: | Artigo de Periódico |
Título : | Universality in short-range Ising spin glasses |
Otros títulos : | Physica A: Statistical Mechanics and its Applications |
Autor : | Nogueira Júnior, E. Coutinho, Sérgio Nobre, F. D. Curado, E. M. F. |
metadata.dc.creator: | Nogueira Júnior, E. Coutinho, Sérgio Nobre, F. D. Curado, E. M. F. |
Resumen : | The role of the distribution of coupling constants in the critical exponents of the short-range Ising spin-glass model is investigated via real space renormalization group. A saddle-point spin glass critical point characterized by a fixed-point distribution is found in an appropriated parameter space. The critical exponents β and ν are directly estimated from the data of the local Edwards–Anderson order parameters for the model defined on a diamond hierarchical lattice of fractal dimension df=3. Four distinct initial distributions of coupling constants (Gaussian, bimodal, uniform and exponential) are considered; the results clearly indicate a universal behaviour. |
Palabras clave : | Spin glass Critical exponents Universality |
URI : | http://www.repositorio.ufba.br/ri/handle/ri/7976 |
Fecha de publicación : | 1999 |
Aparece en las colecciones: | Artigo Publicado em Periódico (FIS) |
Ficheros en este ítem:
Fichero | Descripción | Tamaño | Formato | |
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Nogueira Jr.pdf Restricted Access | 105,44 kB | Adobe PDF | Visualizar/Abrir Request a copy |
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