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https://repositorio.ufba.br/handle/ri/7976
metadata.dc.type: | Artigo de Periódico |
Title: | Universality in short-range Ising spin glasses |
Other Titles: | Physica A: Statistical Mechanics and its Applications |
Authors: | 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. |
Abstract: | 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. |
Keywords: | Spin glass Critical exponents Universality |
URI: | http://www.repositorio.ufba.br/ri/handle/ri/7976 |
Issue Date: | 1999 |
Appears in Collections: | Artigo Publicado em Periódico (FIS) |
Files in This Item:
File | Description | Size | Format | |
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Nogueira Jr.pdf Restricted Access | 105,44 kB | Adobe PDF | View/Open Request a copy |
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