Ion-Acoustic Surface Waves in a Complex Plasma with Lorentzian Distribution

Abstract

The electrostatic modes of dusty ion-acoustic surface waves propagating on the interface between a vacuum and a complex (dusty) plasma are kinetically investigated by using the dispersion relation based on the Vlasov-Maxwell equations. The complex plasma consists of the electron and ion plasmas with Lorentzian distributions and dust particles in the form of fd = nd (r-rd) where rd indicates the location of dust particles. In the long wavelength limit, the ion-acoustic surface wave in a complex Lorentzian plasma is found to be slower as the non-thermality of electron and ion plasmas increases when the phase velocity is in the range of vi << /kx << ve. The wave is, however, found to be faster as the ratio of ions to electrons increase. Some new results on the ion-acoustic waves in a complex plasma will be given.