Dynamical Spectra in Two-Dimensional Dusty Plasmas

Abstract

Equilibrium molecular dynamics (EMD) simulation has been employed to explore the dynamical structure factors (DSFs) of two dimensional (2D) dusty plasma systems for a wide domain of plasma parameters of Coulomb coupling (Γ) and Debye screening strength (κ). The influence of varying wave vectors (k) on plasma DSFs S(k, ω) have been reported with different combinations of plasma state points (Γ, κ). New simulations has been tested for the influence of different wave vectors on plasma density S(k, ω) in addition to different combinations of plasma state points. New results of plasma density S(k, ω) show that amplitude of oscillation and frequency will vary with increasing value of Coulomb coupling parameter (Γ) and Debye screening strength (κ). These simulation techniques show that transient behavior has been reported for frequency (ω) with various values of Debye screening strength (κ). Moreover, EMD simulation has been checked in order to investigate the behavior of dusty plasma to evaluate DSFs. The outcomes of EMD simulations are matched to earlier known numerical and experimental data. It has been shown that fluctuation of dynamical density increases at intermediate to higher values of coupling parameter. However, it shows less fluctuation at higher values of Debye screening strength (κ).