Diplons in the degenerate regime: exchange and correlation effects

Abstract

We study the exchange and correlation effects on the ground-state properties of dipolar complexes (diplons) formed by the surface electrons on a liquid helium film and positive ions in the substrate supporting the helium film. We use the self-consistent-field approximation including the short-range correlations. The local-field correction, static structure function, exchange and correlation energies, and collective mode dispersions are calculated for systems with different substrates.