Dynamical properties of strongly coupled electronic bilayers: A molecular dynamics study

Extensive molecular dynamics (MD) calculations have been performed for a classical symmetric electronic bilayer system for various values of the coupling parameter Gamma and interlayer separation d. Static structure factors were obtained, but the emphasis was on dynamic correlation functions, in particular the intralayer and interlayer intermediate scattering functions F(q,t) and their Fourier transforms S(q,omega). Results and analysis are presented here mainly for the plasma parameter Gamma=80, where previous MD studies have shown dramatic changes in certain properties of the system for intermediate values of d. Significant variations in the dynamic structure factors S(q,omega) with interlayer separation are observed and a detailed discussion is presented. An emergence of two side peaks is noted for certain values of wave vector q and interlayer separation d; this novel behavior appears only for high values of Gamma.