Kong Wei, Liu Songfen, Hu Beilai, Wang Long
Physics Department, Nankai University, Tianjin, China.
Phys Rev E Stat Nonlin Soft Matter Phys. 2009 Sep;80(3 Pt 2):036406. doi: 10.1103/PhysRevE.80.036406. Epub 2009 Sep 24.
Diffusive and structural properties in the binary mixture of charged particles are investigated based on the molecular dynamical simulation. It is shown that the particles with higher charge enhance or weaken the diffusion of the whole system depending on the coupling strength, and regimes of subdiffusion as well as normal diffusion are identified. The nonmonotonous diffusion, i.e., the diffusion at first is increased and then is decreased with increasing the higher charged particles, is strongest close to the phase from liquidlike state to solidlike state. Stronger coupling and lower concentration of higher charged particles are in favor of the formation of ordered shells centered at the higher charged particles.
基于分子动力学模拟研究了带电粒子二元混合物中的扩散和结构性质。结果表明，电荷较高的粒子根据耦合强度增强或减弱整个系统的扩散，并识别出亚扩散和正常扩散区域。非单调扩散，即随着电荷较高粒子数量增加，扩散先增大后减小，在接近从液态到固态的相时最为强烈。更强的耦合和更低浓度的电荷较高粒子有利于形成以电荷较高粒子为中心的有序壳层。
