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 -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.
Cite
@article{arxiv.1006.1816,
title = {Structural and dynamical properties of a quasi-one-dimensional classical binary system},
author = {W. P. Ferreira and J. C. N. Carvalho and P. W. S. Oliveira and G. A. Farias and F. M. Peeters},
journal= {arXiv preprint arXiv:1006.1816},
year = {2010}
}
Comments
11 pages, 11 figs