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HL: Fachverband Halbleiterphysik
HL 74: Poster IIIA
HL 74.4: Poster
Donnerstag, 19. März 2020, 15:00–17:30, P2/2OG
Microwave Studies of Graphene/hBN Heterostructures — •Vincent Strenzke1, Udai Singh1, Marta Prada2, Lars Tiemann1, and Robert Blick1 — 1Center for Hybrid Nanostructures, Universität Hamburg, Hamburg, Germany — 2I. Institute for Theoretical Physics, Universität Hamburg, Hamburg, Germany
Recently, it has been revealed that the band structure of monolayer graphene exhibits a small band gap in the range of tenth of μeV that results from intrinsic spin orbit interaction. Such low energies can be probed in magnetotransport experiments at cryogenic temperatures, by employing a resistively detected microwave resonance method. In this work, graphene was combined with hexagonal boron nitride (hBN), i.e., a two-dimensional material which is a superior substrate for high-quality electronics as compared to silicon substrates. In these graphene/hBN heterostructures, we observed additional features in the microwave resonance spectrum, signalling additional interactions and phenomena. For further fundamental studies on the properties of two-dimensional van der Waals materials, it will be interesting to employ this method on e.g. bilayer graphene or transition metal dichalcogenide heterostructures with a controlled stacking order.