منابع مشابه
Critical Properties of Spin-Glasses
The critical properties of the model of a spin-glass proposed by Edwards and Anderson are studied using the renormalization group. The critical exponents are calculated in 6−ε spatial dimensions. It is argued that a tricritical point can exist where the nonordering field is the skewness of the distribution of J.
متن کاملThe Critical Exponent θ ′ in Spin Glasses
Short-time dynamic scaling behavior of the 3D ±J Ising spin glass is studied by Monte Carlo methods. Starting the replicas with independent initial configurations with a small pseudo magnetization, the dynamic evolution of the overlap q(t) between two replicas is measured. The initial increase of the overlap q(t) is observed and the corresponding exponent θ ′ is obtained. From the scaling relat...
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We present a scaling analysis of the nonlinear susceptibility data above the freezing temperature in the spin glass system Fe0.25Zn0.75F2. The critical exponents obtained are in excellent agreement with those found in metallic systems and are also compatible with theoretical predictions for short range Ising spin glasses. The randomly diluted highly anisotropic antiferromagnet Fe,Znl-,Fz with x...
متن کاملCritical behavior and universality in Lévy spin glasses
Juan Carlos Andresen,1 Katharina Janzen,2 and Helmut G. Katzgraber3,1 1Theoretische Physik, ETH Zurich, CH-8093 Zurich, Switzerland 2Institut für Physik, Carl-von-Ossietzky-Universität, 26111 Oldenburg, Germany 3Department of Physics and Astronomy, Texas A&M University, College Station, Texas 77843-4242, USA (Received 8 February 2011; revised manuscript received 18 March 2011; published 13 May ...
متن کاملSelf-organized critical behavior in Ising spin glasses
We have studied numerically the states reached in a quench from various temperatures in the onedimensional fully-connected Kotliar, Anderson and Stein Ising spin glass model. This is a model where there are long-range interactions between the spins which falls off as a power σ of their separation. We have made a detailed study in particular of the energies of the states reached in a quench from...
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ژورنال
عنوان ژورنال: Nature
سال: 1999
ISSN: 0028-0836,1476-4687
DOI: 10.1038/20317