Regensburg 2019 – wissenschaftliches Programm

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HL: Fachverband Halbleiterphysik

HL 12: HL Poster I

HL 12.6: Poster

Montag, 1. April 2019, 17:30–20:00, Poster E

Magnetotransport properties of weakly coupled double trilayer graphene — •Xiao Xiao, Sung Ju Hong, Christopher Belke, and Rolf J. Haug — Institut für Festkörperphysik, Leibniz Universität Hannover, Hannover, Germany

We have investigated magnetotransport properties of double trilayer graphene (DTLG). The DTLG was fabricated by stacking two trilayer graphene (TLG) flakes. Analyzing the edges of the two flakes in the optical microscope, we identified a large twist angle around 24°. This is consistent with the electrical measurements which show the superposition of two independent magnetotransport properties. As in twisted bilayer graphene, the large twist angle seems to result in a weak coupling between the two layers. In the observed Landau fan diagram, one of the DTLG turns out to be ABA-stacked TLG with broken symmetry states. Furthermore, we found an additional high carrier density which comes from the other TLG.