Silva F C O, Apolinario S W S
Departamento de Física, Universidade Federal de Pernambuco, 50670-901 Recife, PE, Brazil.
Phys Rev E Stat Nonlin Soft Matter Phys. 2014 Jun;89(6):062318. doi: 10.1103/PhysRevE.89.062318. Epub 2014 Jun 26.
We investigate the structural properties of a small binary system of dusty plasma subjected to an anisotropic external confinement. We have found that the ground state can form various symmetrical configurations, which generally correspond to variations of a multiple-ring structure. The presence of such structures is given through a detailed phase diagram constructed for the systems with N=18 and 24 particles. Furthermore, we show that the configurations of multiple rings can present a persistent behavior for the case in which the number of less-charged particles is equal to a multiple of the number of particles per ring. Finally, we discuss the main characteristics of the transitions of first and second orders since these are related to the main configurational changes of the ground states.
我们研究了处于各向异性外部约束下的小尘埃等离子体二元系统的结构特性。我们发现基态可以形成各种对称构型，这些构型通常对应于多环结构的变化。通过为具有18和24个粒子的系统构建的详细相图，可以看出此类结构的存在。此外，我们表明，对于带电量较少的粒子数等于每个环中粒子数的倍数的情况，多环构型可以呈现出持续的行为。最后，我们讨论了一阶和二阶跃迁的主要特征，因为这些与基态的主要构型变化有关。
