A dusty plasma crystalline configuration consisting of charged dust grains of alternating charge sign (.../+/-/+/-/+/...) and mass is considered. Both charge and mass of each dust species are taken to be constant. Considering the equations of longitudinal motion, a dispersion relation for linear longitudinal vibrations is derived from first principles and then analyzed. Two harmonic modes are obtained, namely, an acoustic mode and an inverse-dispersive optic-like one. The nonlinear aspects of acoustic longitudinal dust grain motion are addressed via a generalized Boussinesq (and, alternatively, a generalized Korteweg-de Vries) description. (C) 2005 American Institute of Physics.
ASJC Scopus subject areas
- Physics and Astronomy(all)
- Condensed Matter Physics
Kourakis, Y., Shukla, P. K., & Morfill, G. E. (2005). Linear and nonlinear dynamics of a dust bicrystal consisting of positive and negative dust particles. Physics of Plasmas, 12(11), 1-6. . https://doi.org/10.1063/1.2130693