Berlin 2015 – wissenschaftliches Programm
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HL: Fachverband Halbleiterphysik
HL 103: Spintronics incl. quantum dynamics (MA with HL/TT)
HL 103.6: Vortrag
Freitag, 20. März 2015, 11:00–11:15, EB 202
Electronic transport in carbon nanotube quantum dots functionalized with magnetic molecules — •Carola Meyer1,2, Claire Besson1,2, Michael Schnee1,2, Henrik Flötotto3, Robert Frielinghaus1,2, Lothar Houben2,4, Paul Kögerler2,3, and Claus M. Schneider1,2 — 1Peter Grünberg Institut, Forschungszentrum Jülich, 52425 Jülich, Germany — 2JARA - Fundamentals of Future Information Technologies, Germany — 3RWTH Aachen University, Institute for Inorganic Chemistry, 52074 Aachen, Germany — 4Ernst Ruska-Center for Microscopy and Spectroscopy with Electrons, Forschungszentrum Jülich, 52425 Jülich, Germany
Transport devices built from individual functionalized carbon nanotubes (CNTs) show great potential for instance in spintronics applications. We graft magnetic complexes to CNTs [1]. The route for the CNT functionalization is very general, based on ligand exchange, and can be applied for different molecules, in particular SMMs. We present first quantum transport measurements on individual functionalized CNTs that prove only weak distortion of the electron wave function by the covalent functionalization. The g-factor of the chemically modified CNT quantum dot (QD) is much smaller compared to pristine CNT QDs indicating spin interaction between the QD and the attached molecules. A clear random telegraph signal is recorded depending on the states of the QD. Origin of timescale and energy of the signal are discussed. [1] Meyer, C. et al., Phys. Status Solidi B 249, 2412(2012)