Dresden 2006 – wissenschaftliches Programm

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HL: Halbleiterphysik

HL 9: Poster I

HL 9.76: Poster

Montag, 27. März 2006, 15:15–17:45, P3

Miscellaneous current measurements through carbon nanotubes — •Christoph Würstle, Jens Ebbecke, and Achim Wixforth — Institut für Physik der Universität Augsburg, Experimentalphysik I, Universitätsstr. 1, 86159 Augsburg

We present measurements where we align carbon nanotubes (CNT) with surface acoustic waves (SAW) over predefined contacts. When the contacts are close enough a contacted CNT behaves like a quantum dot (QD). At low temperatures of around 4.2 K we investigate the effect of a finite Shottky-Barrier and also Coulomb blockade in such a system. Instead of applying a finite source drain voltage, we also use a SAW to induce a current (in dependence of the gate voltage) through the QD. With this method our aim is to measure quantized current through a CNT.