title: Lateral electronic screening in quasi-one-dimensional plasmons.
abstract: The properties of one-dimensional (1D) plasmons are rather unexplored. We investigated the plasmonic collective excitations, measured as one-dimensional plasmon dispersions with electron energy loss spectroscopy, highly resolved both in energy and lateral momentum, for both phases of Au induced chains on stepped Si(553) substrates. We observe 1D dispersions that are strongly influenced by the lateral chain width and by the interchain coupling. Indications for the existence of two different plasmons originating from two surface bands of the systems are given for the low coverage phase.
authors.affiliation: Institut für Festkörperphysik, Leibniz Universität Hannover, Appelstraße 2, 30167 Hannover, Germany.
authors.forename: T
authors.initials: T
authors.lastname: Lichtenstein
authors.forename: C
authors.initials: C
authors.lastname: Tegenkamp
authors.forename: H
authors.initials: H
authors.lastname: Pfnür