Regensburg 2013 – scientific programme
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TT: Fachverband Tiefe Temperaturen
TT 58: Poster Session Transport & Matter at Low Temperature
TT 58.14: Poster
Thursday, March 14, 2013, 15:00–19:00, Poster D
Transport through capacitively coupled carbon nanotube bundles. — Birgit Kießig1,2, •Roland Schäfer1, Cornelius Thiele1,3, Ralph Krupke1,3, and Hilbert v. Löhneysen1,2 — 1Karlsruher Institut für Technologie, Institut für Festkörperphysik, 76021 Karlsruhe — 2Karlsruher Institut für Technologie, Physikalisches Institut, 76131 Karlsruhe — 3Karlsruher Institut für Technologie, Institut für Nanotechnologie, 76021 Karlsruhe
We have investigated transport through single walled carbon nanotubes deposited by AC electrophoresis at low temperatures. The samples comprise source and drain electrodes as well as two independent gates. Measurements of current as function of the gate voltages give evidence that transport is due to a bundle of a few tubes which open up several parallel conductance channels. We present a sequential tunneling model in which three quantum dots are connected in parallel to source and drain. Including capacitive coupling between the dots leads to transport characteristics which are in qualitative accord with our measurements.