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|Title: ||Short-range Ising spin glasses: a critical exponent study|
|Other Titles: ||Physica A: Statistical Mechanics and its Applications|
|Authors: ||Nogueira Júnior, E.|
Nobre, F. D.
Curado, E. M. F.
|Keywords: ||Spin glasses;Short range interactions;Critical exponents|
|Issue Date: ||1998|
|Abstract: ||The critical properties of short-range Ising spin-glass models, defined on diamond hierarchical lattices of graph fractal dimensions df=2.58,3, and 4, and scaling factor 2, are studied via a method based on the Migdal–Kadanoff renormalization-group scheme. The order-parameter critical exponent β is directly estimated from the data of the local Edwards–Anderson (EA) order parameter, obtained through an exact recursion procedure. The scaling of the EA order parameter, leading to estimates of the ν exponent of the correlation length is also performed. Four distinct initial distributions of the quenched coupling constants (Gaussian, bimodal, uniform and exponential) are considered. Deviations from a universal behavior are observed and analysed in the framework of the renormalized flow in a two-dimensional appropriate parameter space.|
|Description: ||Texto completo: acesso restrito. p.365–370|
|Appears in Collections:||Artigos Publicados em Periódicos (FIS)|
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