title: Doping of monatomic Cu chains with single Co atoms.
abstract: Close-packed Co-Cu chains of various length and composition were assembled from single Co and Cu atoms on Cu(111) by atom manipulation in a low-temperature scanning tunneling microscope. Local spectroscopy reveals significant electronic Co-Cu coupling leading to confined quantum states delocalized along the heteroatomic chain. Composite Co-Cu chains provide a model case in which the quantum state of an atomic-scale host structure can be tuned by the controlled incorporation of foreign atoms.
authors.affiliation: Paul-Drude-Institut für Festkörperelektronik, Hausvogteiplatz 5-7, D-10117 Berlin, Germany.
authors.forename: Jérôme
authors.initials: J
authors.lastname: Lagoute
authors.forename: Christophe
authors.initials: C
authors.lastname: Nacci
authors.forename: Stefan
authors.initials: S
authors.lastname: Fölsch