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HL: Fachverband Halbleiterphysik

HL 74: Poster IIIA

HL 74.16: Poster

Thursday, March 19, 2020, 15:00–17:30, P2/2OG

Manufacturing and magnetotransport properties of weakly coupled double trilayer graphene — •Xiao Xiao, Sung Ju Hong, Christopher Belke, and Rolf Haug — Festkörperphysik-Institut, Hannover, Germany

We have investigated magnetotransport of double trilayer graphene (DTLG). The DTLG was fabricated by stacking two trilayer graphene (TLG) flakes with polypropylene carbonate in a dry transfer method. Analysing the edges of the two flakes in the optical microscope, we identified a large twist angle around 24°. This is consistent with the electrical measurement 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. Furthermore, we found an additional high carrier density which comes from the other TLG.