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Please use this identifier to cite or link to this item: http://repositorio.ufba.br/ri/handle/ri/7976

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.
Keywords: Spin glass;Critical exponents;Universality
Issue Date: 1999
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.
Description: Texto completo: acesso restrito. p.125–132
URI: http://www.repositorio.ufba.br/ri/handle/ri/7976
ISSN: 0378-4371
Appears in Collections:Artigos Publicados em Periódicos (FIS)

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