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Shen, Chuansheng; Chen, Hanshuang; Hou, Zhonghuai, E-mail: hzhlj@ustc.edu.cn2015
AbstractAbstract
[en] We study the heterogeneous nucleation of Ising model on complex networks under a nonequilibrium situation where the impurities perform degree-biased motion controlled by a parameter α. Through the forward flux sampling and detailed analysis on the nucleating clusters, we find that the nucleation rate shows a nonmonotonic dependence on α for small number of impurities, in which a maximal nucleation rate occurs at corresponding to the degree-uncorrelated random motion. Furthermore, we demonstrate the distinct features of the nucleating clusters along the pathway for different preference of impurities motion, which may be used to understand the resonance-like dependence of nucleation rate on the motion bias of impurities. Our theoretical analysis shows that the nonequilibrium diffusion of impurities can always induce a positive energy flux that can facilitate the barrier-crossing nucleation process. The nonmonotonic feature of the average value of the energy flux with α may be the origin of our simulation results. (letter)
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Available from http://dx.doi.org/10.1209/0295-5075/111/48005; This record replaces 51053841; Country of input: International Atomic Energy Agency (IAEA)
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