Dresden 2014 – wissenschaftliches Programm
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HL: Fachverband Halbleiterphysik
HL 84: Poster: Electronic structure theory / Carbon (other than graphene) / Si, Ge, and SiC / III-V semiconductors (other than nitrides)
HL 84.6: Poster
Mittwoch, 2. April 2014, 17:00–20:00, P1
Quantum transport in functionalized carbon nanotubes — •Michael Schnee1,3, Robert Frielinghaus1,3, Claire Besson1,2,3, Paul Kögerler1,2,3, Claus M. Schneider1,3, and Carola Meyer1,3 — 1Peter Grünberg Institut, Forschungszentrum Jülich, 52425 Jülich, Germany — 2Institut für Anorganische Chemie, RWTH Aachen, 52074 Aachen, Germany — 3JARA - Fundamentals of Future Information Technologies
Carbon nanotubes are a promising material with regard to future nanoelectronic applications due to their exceptional mechanical and electronic properties. Moreover, the transport properties can be altered by attaching molecules to the CNTs. Thus, electronic transport experiments on functionalized CNTs can be used to study CNT-molecule interactions.
In this work we present experiments conducted on CNTs covalently functionalized with tetramanganese coordination complexes. The functionalization procedure is very versatile and manganese can be exchanged with several other metals.
The CNTs are cooled down to a temperature of T=25mK using a dilution refrigerator. First results of quantum transport experiments on functionalized CNTs suggest a quantum dot size similar to the designed device length. This indicates that the electron wave function is only weakly disturbed and coherence is not destroyed by the covalent bonding of a small number of molecules. Therefore, quantum transport spectroscopy can be used to study the interactions between CNTs and the attached molecules.