Nonequilibrium Relaxation Study of Effect of Randomness on Critical Universality Classes of Ferromagnetic Phase Transitions
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概要
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The ferromagnetic critical exponents are estimated along the phase boundary for the gauge glass model in three dimensions. The nonequilibrium relaxation method is applied to estimate the transition temperature and critical exponents. Together with the previously obtained results for the \pm J Ising model in two and three dimensions, universality classes are examined for these disordered models. The result reveals a direct numerical confirmation of the Harris criterion for typical models with positive, zero and negative values of \alpha_{0}, the exponent for the specific heat in the regular case. In addition, we show a nonuniversal behavior of the dynamical exponent z with respect to the randomness for these models irrespective of \alpha_{0}.
- 2012-07-15
著者
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Ito Nobuyasu
Department Of Applied Physics Faculty Of Engineering The University Of Tokyo
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Ozeki Yukiyasu
Department Of Applied Physics And Chemistry The University Of Electro-communications
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Ozeki Yukiyasu
Department of Engineering Sciences, Graduate School of Informatics and Engineering, The University of Electro-Communications, Chofu, Tokyo 182-8585, Japan
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Ito Nobuyasu
Department of Applied Physics, Graduate School of Engineering, The University of Tokyo, Bunkyo, Tokyo 113-8656, Japan
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YOTSUYANAGI Satoshi
Department of Applied Physics and Chemistry, Graduate School of Electro-Communications, The University of Electro-Communications, Chofu, Tokyo 182-8585, Japan
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Ito Nobuyasu
Department of applied Physics
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