Structural and dynamical properties of a quasi-one-dimensional classical binary system

Abstract

The ground state configurations and the \lq{}\lq{}normal\rq{}\rq{} mode spectra of a $quasi$-one-dimensional (Q1D) binary system of charged particles interacting through a screened Coulomb potential are presented. The minimum energy configurations were obtained analytically and independently through molecular dynamic simulations. A rich variety of ordered structures were found as a function of the screening parameter, the particle density, and the ratio between the charges of the distinct types of particles. Continuous and discontinuous structural transitions, as well as an unexpected symmetry breaking in the charge distribution are observed when the density of the system is changed. For near equal charges we found a disordered phase where a mixing of the two types of particles occurs. The phonon dispersion curves were calculated within the harmonic approximation for the one- and two-chain structures.

11 pages, 11 figs

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• Two-component mixture of charged particles confined in a channel: melting
• Avalanches, Plasticity, and Ordering in Colloidal Crystals Under Compression
• Positive and Negative Drag, Dynamic Phases, and Commensurability in Coupled One-Dimensional Channels of Particles with Yukawa Interactions
• Second Plasmon and Collective Modes in Binary Coulomb Systems
• Dispersion relations for circular single and double dusty plasma chains
• Chain-like transitions in Wigner crystals: Sequential or non-sequential?
• Lattice modes in a dusty plasma crystal