title: Conductance and Kondo effect in a controlled single-atom contact.
abstract: The tip of a low-temperature scanning tunneling microscope is brought into contact with individual cobalt atoms adsorbed on Cu(100). A smooth transition from the tunneling regime to contact occurs at a conductance of G approximately G0. Spectroscopy in the contact regime, i.e., at currents in a muA range, was achieved and indicated a significant change of the Kondo temperature TK. Calculations indicate that the proximity of the tip shifts the cobalt d band and thus affects TK.
authors.affiliation: Institut für Experimentelle und Angewandte Physik, Christian-Albrechts-Universität zu Kiel, D-24098 Kiel, Germany.
authors.forename: N
authors.initials: N
authors.lastname: Néel
authors.forename: J
authors.initials: J
authors.lastname: Kröger
authors.forename: L
authors.initials: L
authors.lastname: Limot
authors.forename: K
authors.initials: K
authors.lastname: Palotas
authors.forename: W A
authors.initials: WA
authors.lastname: Hofer
authors.forename: R
authors.initials: R
authors.lastname: Berndt