Physica A: Statistical Mechanics and its Applications
| Autor: | Nogueira Júnior, E., Coutinho, Sérgio, Nobre, F. D., Curado, E. M. F. |
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| Jazyk: | angličtina |
| Rok vydání: | 1999 |
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| Zdroj: | Repositório Institucional da UFBA Universidade Federal da Bahia (UFBA) instacron:UFBA |
| DOI: | 10.1016/S0378-4371(99)00229-0 |
| Popis: | Texto completo: acesso restrito. p.125–132 Submitted by Suelen Reis (suelen_suzane@hotmail.com) on 2013-01-18T12:09:29Z No. of bitstreams: 1 Nogueira Jr.pdf: 107975 bytes, checksum: acf355cafe7ca4f8a4933be95374286d (MD5) Made available in DSpace on 2013-01-18T12:09:29Z (GMT). No. of bitstreams: 1 Nogueira Jr.pdf: 107975 bytes, checksum: acf355cafe7ca4f8a4933be95374286d (MD5) Previous issue date: 1999 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. |
| Databáze: | OpenAIRE |
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