SKM 2021 – wissenschaftliches Programm

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HL: Fachverband Halbleiterphysik

HL 5: 2D semiconductors and van der Waals heterostructures I (joint session HL/DS)

HL 5.7: Vortrag

Montag, 27. September 2021, 15:30–15:45, H4

Lattice Configurations of Self-Assembled Folded Graphene — •Lina Bockhorn, Johannes C. Rode, Lucas Gnörich, Pengfei Zuo, and Rolf J. Haug — Institut für Festkörperphysik, Leibniz Universität Hannover, 30167 Hannover, Germany

The stacking- and folding angle of 2D materials to 3D structures has emerged as an important, novel tuning parameter for the tailoring of optical, mechanical, electronic and magnetic properties. Therefore, it is highly desirable to gather insight into the mechanical formation of these structures on the nano-scale.

Here, we focus on the evolution of self-assembled folded graphene generated via atomic force microscopy technique, which could give a deep insight into its underlying growth energy [1, 2, 3]. The self-assembly process involves the folding-over of the graphene layer and the subsequent growth of a twisted graphene bilayer. We conclude, that these self-assembled structures move not only forward during the growth process but also appear to rotate and lock in at specific commensurate twist angles.

[1] J. C. Rode et al., Ann. Phys. 529, 1700025 (2017).

[2] J. C. Rode et al., 2D Mater. 6, 015021 (2018).

[3] L. Bockhorn et al., Appl. Phys. Lett. 118, 173101 (2021).