title: Binary dusty plasma Coulomb balls.
abstract: We investigated the mixing and segregation of a system consisting of two different species of particles, having different charges, interacting through a pure Coulomb potential, and confined in a three-dimensional parabolic trap. The structure of the cluster and its normal mode spectrum are analyzed as a function of the relative charge and the relative number of different types of particles. We found that (a) the system can be in a mixed or segregated state depending on the relative charge ratio parameter and (b) the segregation process is mediated by a first or second order structural phase transition which strongly influences the magic cluster properties of the system.
authors: Departamento de Física, Universidade Federal de Pernambuco, 50670-901 Recife, PE, Brazil. sergio.apolinario@df.ufpe.br
authors: S W S
authors: SW
authors: Apolinario
authors: F M
authors: FM
authors: Peeters