Regensburg 2010 – wissenschaftliches Programm
Bereiche | Tage | Auswahl | Suche | Downloads | Hilfe
O: Fachverband Oberflächenphysik
O 11: Methods: Scanning probe techniques II
O 11.1: Vortrag
Montag, 22. März 2010, 15:00–15:15, H32
Light emission from single Ag atom contacts — •Natalia Schneider1, Guillaume Schull2, and Richard Berndt1 — 1Institut für Experimentelle und Angewandte Physik, Christian-Albrechts-Universität zu Kiel, D-24098 Kiel, Germany — 2Institut de Physique et de Chimie de Strasbourg, CNRS UMR 7504, 67034 Strasbourg, France
Using a cryogenic scanning tunneling microscope, we investigated the transition from tunneling to a single atom contact on Ag(111) at voltages between 1.4 and 2.0 V. Contrary to Au/Au(111) junctions, Ag/Ag(111) junctions do not exhibit a jump. This enables a detailed study of the junction luminescence at each step of the contact formation. Optical spectra reflect single and multiple electron processes and their distinct evolution as a single-atom contact is formed.