Yang Wen, Kong Minghui, Milosević M V, Zeng Zhi, Peeters F M
Key Laboratory of Materials Physics, Institute of Solid State Physics, Chinese Academy of Sciences, P. O. Box 1129, Hefei 230031, China.
Phys Rev E Stat Nonlin Soft Matter Phys. 2007 Oct;76(4 Pt 1):041404. doi: 10.1103/PhysRevE.76.041404. Epub 2007 Oct 24.
Within the Monte Carlo formalism supplemented by the modified Newton-Raphson optimization technique, we investigated structural and dynamical properties of two-dimensional binary clusters confined in an external hard-wall potential. Two species of differently charged classical particles, interacting through the repulsive Coulomb force are confined in the cluster. Subtle changes in the energy landscape and the stable cluster configurations are investigated as a function of the total number of particles and the relative number of each of the two particle species. The excitation spectrum and the normal modes corresponding to the ground-state configuration of the system are discussed, and the lowest nonzero eigenfrequency as a measure of the stability of the cluster is analyzed. The influence of the particle mass on the eigenfrequencies and eigenmodes are studied, i.e., we study a binary system of particles with different charge and different mass. Several unique features distinct from a monodisperse system are obtained.
在蒙特卡罗形式主义并辅以改进的牛顿 - 拉夫逊优化技术的框架内，我们研究了限制在外部硬壁势中的二维二元团簇的结构和动力学性质。两种通过排斥库仑力相互作用的不同带电经典粒子被限制在团簇中。研究了能量景观和稳定团簇构型随粒子总数以及两种粒子各自相对数量的细微变化。讨论了对应于系统基态构型的激发谱和正常模式，并分析了作为团簇稳定性度量的最低非零本征频率。研究了粒子质量对本征频率和本征模式的影响，即我们研究了具有不同电荷和不同质量的二元粒子系统。获得了一些与单分散系统不同的独特特征。
