Berlin 2018 – wissenschaftliches Programm
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DS: Fachverband Dünne Schichten
DS 17: Poster Session I
DS 17.35: Poster
Dienstag, 13. März 2018, 18:15–20:15, Poster B
Spin and Charge Transport in Doped Graphene as a Tailored Carbon Allotrope — •Marie-Luise Braatz1,2, Nils Richter1,2, Alexander Tries1,2,3, Axel Binder4, Hai I. Wang3, and Mathias Kläui1,2 — 1Institute of Physics, Johannes Gutenberg University Mainz, 55099 Mainz, Germany — 2Graduate School of Excellence Materials Science in Mainz (MAINZ), 55128 Mainz, Germany — 3Max-Planck-Institut für Polymerforschung, 55128 Mainz, Germany — 4BASF SE, 67056 Ludwigshafen, Germany
Graphene is a remarkable material with numerous extraordinary properties, among them a high charge carrier mobility. However, it does not have a band gap, which is necessary for many applications. To modify graphene in this respect we employ chemical doping which has been shown to have an effect on the electronic structure [1]. Hence, we use heteroatom-doping, in particular nitrogen, to modify the structure as well as the electronic and magnetotransport properties. The amount of dopants is systematically varied so different dopant concentrations can be compared. The samples are then analyzed by Raman and electron microscopy to elucidate the changes in structure. Measuring the magnetoresistance at various temperatures and fields allows us to correlate the structure to the charge transport properties [2].
[1] H. Wang et al., ACS Catal. 2, 781 (2012)
[2] M. Rein et al., ACS Nano 9, 1360 (2015)