标题： 不同大小尘埃颗粒组成的尘晶动力学 显示英文标题

标题： Dynamics of a Dust Crystal with Two Different Size Dust Species

摘要： 一个自洽的三维模型被用来研究复杂（尘埃）等离子体中多种尺寸尘埃颗粒在尘晶中的效应。除了通过 Yukawa 势相互作用的粒子间力外，该模型还包括重力、电源电极上方鞘层电势的变化以及径向限制势的影响。模拟研究了 6.5 微米和 8.9 微米单分散颗粒混合物的各种比例，并比较了它们的相关函数、晶体形成的电势能以及两种不同鞘层厚度下平面内和平面外尘埃晶格波（DLW）模式的色散关系。在 7 毫米厚的鞘层中，颗粒按大小在垂直方向上形成两层，并表现为具有弱层间相关性的双层晶体。在 3 毫米厚的鞘层中，颗粒形成了几乎单层的晶体；然而晶体的动力学表现出一些双层晶体的特征。 显示英文摘要

摘要： A self-consistent three-dimensional model for a complex (dusty) plasma is used to study the effects of multiple-sized dust grains in a dust crystal. In addition to the interparticle forces, which interact through a Yukawa potential, the model includes the effects of gravity, the variation of the sheath potential above the powered electrode, and a radial confining potential. Simulations studied various ratios of a mix of 6.5- and 8.9-micron monodisperse particles and compared their correlation functions, electric potential energy of the crystal formations, and the dispersion relations for in-plane and out-of-plane dust lattice wave (DLW) modes for two different sheath thicknesses. In the 7 mm sheath, the particles formed two layers in the vertical direction by size, and acted as a two-layer crystal with weak correlation between the layers. In the 3 mm sheath, the particles formed an essentially monolayer crystal; however the crystal dynamics showed some characteristics of a bilayer crystal.