| Monte Carlo Study of Griffiths Phase in Randomly Site Diluted Ising Magnetic System |
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| 作者姓名： | 曹恒 袁松柳 商景林 蒋秀林 李派 王永强 刘莉 |
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| 作者单位： | Department of Physics, Huazhong University of Science and Technology, Wuhan 430074 |
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| 基金项目： | Supported by the National Science Foundation of China under Grant No 10574049. |
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| 摘 要： | We study the dynamics of spin autocorrelation function and the non-equilibrium decay of magnetization in the Criffiths phase of randomly site diluted Ising magnetic systems by Monte Carlo simulation. The results show that the relaxations are non-exponential for both two- and three-dimenslonal diluted Ising magnetic systems. At a long timescale, the asymptotic dynamics of the spin autocorrelation function C（t） behaves in the form of C（t） ～ exp{-A（lnt）^d/d-1}, expected by the theoretical prediction based on clustering arguments. Furthermore we show that the evolution of the spin autocorrelation function satisfies rather well a stretched exponential form of C（t） ～ exp{-（t/t）^β} even at quite small timescales.
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| 关 键 词： | Monte Carlo研究 Griffiths相 磁系统 随机位点 |
| 收稿时间： | 2005-12-23 |
| 修稿时间： | 2005-12-23 |
Monte Carlo Study of Griffiths Phase in Randomly Site Diluted Ising Magnetic System |
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| CAO Heng, YUAN Song-Liu, SHANG Jing-Lin, JIANG Xiu-Lin, LI Pai, WANG Yong-Qiang, LIU Li.Monte Carlo Study of Griffiths Phase in Randomly Site Diluted Ising Magnetic System[J].Chinese Physics Letters,2006,23(5):1176-1179. |
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| Authors: | CAO Heng YUAN Song-Liu SHANG Jing-Lin JIANG Xiu-Lin LI Pai WANG Yong-Qiang LIU Li |
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| Institution: | Department of Physics, Huazhong University of Science and Technology, Wuhan 430074 |
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