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TT: Fachverband Tiefe Temperaturen

TT 13: Transport: Poster Session

TT 13.10: Poster

Monday, March 26, 2012, 15:00–19:00, Poster B

Low temperature transport in carbon nanotubes — •Birgit Kießig^1,2, Cornelius Thiele^2,3, Ralph Krupke³, Kai Grube¹, Roland Schäfer¹, and Hilbert v. Löhneysen^1,2 — ¹Karlsruher Institut für Technologie, Institut für Festkörperphysik — ²Karlsruher Institut für Technologie, Physikalisches Institut — ³Karlsruher Institut für Technologie, Institut für Nanotechnologie

We present measurements on gold contacted metallic carbon nanotubes (CNTs) performed in a ³He/⁴He dilution refrigerator between base temperature (∼ 10 mK) and 5 K. In addition to the electrodes spaced 300-400 nm apart, side gates were implemented 50-150 nm from the CNTs.

IV curves show Coulomb blockade at low voltages which can be lifted by gating. For higher voltages conductance increases nonlinearly and assymmetrically. Transport modifications induced by gate voltage and magnetic field up to 8 T are characterized.