title: Dielectric screening in a layered lattice electron gas.
abstract: We study the dielectric screening of an external point charge by a layered lattice electron gas in the random phase approximation. The screened potential at the neighboring sites of the point charge is found to be attractive under certain circumstances. We also investigate the impact of band structure on the screened potential. Our results provide a possible source of intersite attractive interactions in the extended Hubbard model.
authors.forename: Yi
authors.initials: Y
authors.lastname: Gao
authors.forename: Wu-Pei
authors.initials: WP
authors.lastname: Su