Berlin 2005 – wissenschaftliches Programm
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TT: Tiefe Temperaturen
TT 8: Posters Transport
TT 8.27: Poster
Freitag, 4. März 2005, 14:00–18:00, Poster TU C
Electronic Transport through C60 — •Tobias Böhler, Jochen Grebing, and Elke Scheer — FB Physik - Universität Konstanz
The electronic transport through a single or a few C60 molecules is studied experimentally with the help of the mechanically controllable break-junction (MCB) technique [1]. The tip electrodes of the MCB are fabricated of aluminum or gold. The molecule is evaporated onto an opened break-junction under UHV conditions and at low temperatures. At room temperature the experiment shows evidence that the conductance of a single C60 molecule between gold contacts is in the order of a tenth of G0. This can be seen in opening and closing curves and also in time-dependent fluctuations of the conductance. However, the thermal fluctuations of the electrodes hamper the acquisition of meaningful current-voltage characteristics. Therefore we present an improved setup to measure the differential conductance at low temperatures.
[1] T. Böhler et al. Nanotechnology 15 (2004) 465