Doping of monatomic Cu chains with single Co atoms.

Research paper by Jérôme J Lagoute, Christophe C Nacci, Stefan S Fölsch

Indexed on: 16 May '07Published on: 16 May '07Published in: Physical review letters


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.