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

Abstract

Extensive molecular dynamics (MD) calculations have been performed for a classical symmetric electronic bilayer system for various values of the coupling parameter \ensuremath{\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 $S(q,\ensuremath{\omega}).$ Results and analysis are presented here mainly for the plasma parameter $\ensuremath{\Gamma}=80,$ 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 $S(q,\ensuremath{\omega})$ 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 \ensuremath{\Gamma}.