Dresden 2011 – wissenschaftliches Programm

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O: Fachverband Oberflächenphysik

O 36: Poster Session II (Metals; Nanostructures at surfaces; Surface or interface magnetism; Spin-Orbit Interaction at Surfaces; Electron and spin dynamics; Surface dynamics; Methods; Theory and computation of electronic structure)

O 36.25: Poster

Dienstag, 15. März 2011, 18:30–22:00, P4

Ballistic hole transport through PTCDA molecules — •Alexander Bernhart, Mark Kaspers, Christian Bobisch, and Rolf Möller — Faculty of Physics, Center for Nanointegration Duisburg-Essen, University of Duisburg-Essen, Lotharstr. 1, 47048 Duisburg, Germany

Ballistic Electron Emission Microscopy (BEEM) not only represents an ideal technique to study the electronic transmission at the Schottky-interface between a metal and a semiconductor, but moreover it offers capabilities to analyze the ballistic transport through adsorbates on top of a metal. By using a 6 nm Bi film on a p-doped Si(001) substrate it is possible to analyze the ballistic transport of holes through the occupied states of organic adsorbates. For the perylene derivate PTCDA the ballistic current varies between alternating rows of molecules. The comparison to the bare Bi surface reveals that the total BEEM current is reduced by the molecular layer.