Dresden 2017 – wissenschaftliches Programm

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DS: Fachverband Dünne Schichten

DS 30: Two-dimensional materials IV (jointly with HL/TT)

DS 30.11: Vortrag

Mittwoch, 22. März 2017, 12:30–12:45, POT 51

Interlayer Configuration in Twisted Bilayers of Folded Graphene — •Johannes C. Rode, Christopher Belke, Hennrik Schmidt, and Rolf J. Haug — Institut für Festkörperphysik, Leibniz Universität Hannover

Twisted bilayer graphene (TBG), i.e. stacks of two graphene sheets in arbitrary rotational misalignment, exhibit rich electronic spectra[1,2] which are highly dependent on the interlayer twist angle in general[3] as well as details in stacking configuration like lattice commensuration and corrugation[4] in particular. We here examine the latter TBG properties coming from the morphological side: TBG are prepared via Atomic Force Microscope, folding ribbons out of monolayer sheets. In the recently proposed picture of a thermally activated growth process[5], here measured quantities like interlayer distance and shape of the folded edge are found to hold novel information about angle-dependent interlayer configuration and provide insight about interaction in van der Waals bound materials.

0mm [1] H. Schmidt; J. C. Rode; D. Smirnov; R. J. Haug,

Nat. Comm. 5, 5742 (2014).

[2] J. C. Rode; D. Smirnov; H. Schmidt, R. J. Haug,

2D Materials 3, 035005 (2016).

[3] J. M. B. Lopes dos Santos; N. M. R. Perez; A. H. Castro Neto, Phys. Rev. Lett. 99, 25682 (2007).

[4] E. J. Mele, Phys. Rev. B 81, 161405(R) (2010).

[5] J. Annett; G. L. W. Cross, Nature 535, 271-275 (2016).