Self-organization and oscillation of negatively charged dust particles in a 2-dimensional dusty plasma

• Self-organization and oscillation of a 2-dimensional dusty plasma is investigated.
• Effect of the confinement potential on dust self-organization and oscillation is given.
• Effect of the attraction potential on dust self-organization and oscillation is studied.

Negatively charged dust particles immersed in 2-dimensional dusty plasma system are investigated by molecular dynamics simulations. The effects of the confinement potential and attraction interaction potential on dust particle self-organization are studied in detail and two typical dust particle distributions are obtained when the system reaches equilibrium. The average radial velocity (ARV), average radial force (ARF) and radial mean square displacement are employed to analyze the dust particles' dynamics. Both ARVs and ARFs exhibit oscillation behaviors when the simulation system reaches equilibrium state. The relationships between the oscillation and confinement potential and attraction potential are studied in this paper. The simulation results are qualitatively similar to experimental results.