Berlin 2008 – wissenschaftliches Programm
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O: Fachverband Oberflächenphysik
O 8: Metal Substrates: Adsorption of Organic/Bio Molecules I
O 8.6: Vortrag
Montag, 25. Februar 2008, 13:15–13:30, MA 041
Single molecule transport measurements in a well controlled contact geometry — •Ruslan Temirov1, Adam Lassise2, Olga Neucheva1, Frithjof Anders3, Michael Rohlfing4, Bo Song5, Florian Pump5, Gianaurelio Cuniberti5, and Stefan Tautz1 — 1Forschungszentrum Jülich — 2Jacobs University — 3Universität Bremen — 4Universität Osnabruck — 5Technische Universität Dresden
Transport properties of single molecules are presently in the focus of intense research. The reliability of experimental transport studies is, however, often hindered by difficulties in controlling contacts to the measured molecule on atomic level. Here we present single molecule transport experiments made on PTCDA/Ag(111) and PTCDA/Au(111) epitaxial interfaces which achieve a very high degree of control over the contacts [1]. Although the presented transport experiments were conducted in the LT STM, the limitation of the two-terminal STM geometry has been overcome by using a mechanical gating effect induced by the retraction of the STM tip [1]. Due to the high degree of control and the rich tunability achieved in the presented experiments, the obtained experimental data are fit for the comparison with the theory on ab-initio level. First results of such theoretical analysis will be discussed.
[1] R. Temirov, A. Lassise, F. Anders, S. Tautz. cond-mat/0612036