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 84.4: Poster
Mittwoch, 2. April 2014, 17:00–20:00, P1
Peapods on NV-centers in diamond for quantum computing — •Fabian Fritz1,5, Christian Spudat2, Lothar Houben3,5, Nicolas Wöhrl4, Claus M. Schneider1,4, and Carola Meyer1,5 — 1Peter Grünberg Institut, Forschungszentrum Jülich, Germany — 2Fraunhofer ENAS Chemnitz, Germany — 3Ernst Ruska-Centre for Microscopy and Spectroscopy with Electrons, Jülich, Germany — 4University Duisburg-Essen and CeNIDE, Faculty of Physics, Germany — 5JARA - Fundamentals of Future Information Technologies
The electron spin of an endohedral fullerene like N@C60 is very well shielded from the environment showing a long spin coherence time and thus resembles a good quantum bit. The read-out of an individual electron spin remains a challenge but can be achieved by coupling the spin of the N@C60 to an NV-center in diamond. In order to couple several quantum bits, the N@C60 molecules have to be aligned in a one-dimensional chain. This can be accomplished by filling the N@C60 into carbon nanotubes (CNTs), forming so-called peapods. To form such a quantum register, peapods have to be fabricated and placed on diamond substrates.
We present growth of CNTs directly on a diamond surface using chemical vapor deposition (CVD). For the peapod synthesis we use solvent filling instead of vapor filling, since the N@C60 fullerenes are thermally instable. Peapods are synthesized using different solvents and characterized using high-resolution transmission electron microscopy. The most promising solvent to prevent residues in the CNTs is supercritical CO2 due to the small-sized molecules.