Dresden 2011 – wissenschaftliches Programm
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TT: Fachverband Tiefe Temperaturen
TT 38: Poster Session Transport
TT 38.21: Poster
Mittwoch, 16. März 2011, 14:00–18:00, P3
Probing of coherence in molecular and CNT transport — •Birgit Kießig1,2, Ralph Krupke3, Regina Hoffmann2, Dominik Stöffler2, Kai Grube1, Roland Schäfer1, and Hilbert von Löhneysen1,2 — 1Karlsruher Institut für Technologie, Institut für Festkörperphysik, 76021 Karlsruhe — 2Karlsruher Institut für Technologie, Physikalisches Institut, 76128 Karlsruhe — 3Karlsruher Institut für Technologie, Institut für Nanotechnologie, 76021 Karlsruhe
The advancing miniaturisation of electronic circuits has increased the scientific interest in transport properties of single molecules as the smallest available building blocks. Other promising candidates for ultrasmall electronic devices are carbon nanotubes (CNTs), which at the same time are already today far easier to handle than molecules.
We aim to probe a very special characteristic of transport through nanoscale devices, namely coherence. Its occurence in a single electronic building block leads to divergence of the behaviour of a combination of several such devices from the classical expectation.
Molecular transport measurements require the fabrication of conductive electrodes spaced only a few nm apart. To achieve such we chose a feedback controlled electromigration procedure for the preparation of our samples, which we investigated in detail.
Furthermore we also prepared and measured appropriate samples for coherence probing of transport through CNTs.