NDLI: Thermal critical behavior and universality aspects of the three-dimensional random-field Ising model

Content Provider	Springer Nature Link
Author	Malakis, A. Fytas, N. G.
Copyright Year	2006
Abstract	The three-dimensional bimodal random-field Ising model is investigated using the N-fold version of the Wang-Landau algorithm. The essential energy subspaces are determined by the recently developed critical minimum energy subspace technique, and two implementations of this scheme are utilized. The random fields are obtained from a bimodal discrete (±Δ) distribution, and we study the model for various values of the disorder strength Δ, Δ=0.5,1,1.5 and 2, on cubic lattices with linear sizes L=4–24. We extract information for the probability distributions of the specific heat peaks over samples of random fields. This permits us to obtain the phase diagram and present the finite-size behavior of the specific heat. The question of saturation of the specific heat is re-examined and it is shown that the open problem of universality for the random-field Ising model is strongly influenced by the lack of self-averaging of the model. This property appears to be substantially depended on the disorder strength.
Starting Page	257
Ending Page	266
Page Count	10
File Format	PDF
ISSN	14346028
Journal	The European Physical Journal B
Volume Number	51
Issue Number	2
e-ISSN	14346036
Language	English
Publisher	EDP Sciences
Publisher Date	2006-06-02
Publisher Place	Les Ulis
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Physics Complexity Fluids Condensed Matter Solid State Physics and Spectroscopy Superconductivity, Superfluidity, Quantum Fluids
Content Type	Text
Resource Type	Article
Subject	Electronic, Optical and Magnetic Materials Condensed Matter Physics

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