Nelissen K, Partoens B, Peeters F M
Departement Fysica, Universiteit Antwerpen (Campus Middelheim), Groenenborgerlaan 171, B-2020 Antwerpen, Belgium.
Phys Rev E Stat Nonlin Soft Matter Phys. 2005 Jun;71(6 Pt 2):066204. doi: 10.1103/PhysRevE.71.066204. Epub 2005 Jun 6.
A system of classical charged particles confined in a two-dimensional trap and interacting through a competing short-range attraction and long-range repulsion potential is studied. The structure of the system strongly depends on the interaction range of the short-range attraction potential and the total number of particles. Depending on the appropriate choice of parameters for the attractive potential, the particles organize themselves in bubbles, stripe phases, and ringlike configurations, or combinations of both of them. Detailed phase diagrams are presented for systems consisting of N=2 up to N=6 particles. General rules are derived for the different subsequent transitions between those configurations and how the ground state configuration of a large system can be deduced from the one of a small number of particles.
研究了一个经典带电粒子系统，该系统被限制在二维陷阱中，并通过竞争的短程吸引和长程排斥势相互作用。系统的结构强烈依赖于短程吸引势的相互作用范围和粒子总数。根据吸引势参数的适当选择，粒子会自行组织成气泡、条纹相、环状构型或它们两者的组合。给出了由N = 2至N = 6个粒子组成的系统的详细相图。推导了这些构型之间不同后续转变的一般规则，以及如何从少量粒子的基态构型推导出大系统的基态构型。
