Berlin 2005 – scientific programme

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O: Oberflächenphysik

O 48: Oxide und Isolatoren II

O 48.11: Talk

Tuesday, March 8, 2005, 18:15–18:30, TU EB107

Submonolayer growth of KCl on pristine and oxygen covered Cu(110) — •Michael Vogelgesang, Lars Diekhöner, Vitali Lucia, M. Alexander Schneider, and Klaus Kern — Max-Planck-Institut für Festkörperforschung, Heisenbergstraße 1, 70569 Stuttgart

By forming insulating ultrathin films on metal surfaces one can decrease the interaction of adsorbates with the metal electron system. In the monolayer regime these films are transparent enough to allow electron tunneling. As an example of such a system potassium chloride on Cu(110) has been investigated by low temperature scanning tunneling microscopy. For submonolayer growth at room temperature we find that KCl (100) forms large islands on Cu terraces and grows with its [010] direction along the [221] direction of the Cu(110) substrate. On a Cu(110) O(2x1) substrate the nucleation can be steered as KCl nucleates preferentially on the oxygen covered regions. First results of spectroscopic measurements will also be presented.