Quantum 2025 – scientific programme

Parts | Days | Selection | Search | Updates | Downloads | Help

MON: Monday Contributed Sessions

MON 23: Poster Session: Fundamental Aspects and Model Systems

MON 23.51: Poster

Monday, September 8, 2025, 18:30–20:30, ZHG Foyer 1. OG

Topological Phenomena in Folded Bilayer Graphene Heterostructures — •Hannes Kakuschke, Lina Bockhorn, and Rolf Haug — Institut für Festkörperphysik, Leibniz Universität Hannover, 30167 Hannover, Germany

Mono- and bilayer systems of graphene have been extensively researched due to their unique magnetic and electronic transport properties. In more recent work, folded graphene [1, 2] heterostructures exhibit fascinating phenomena. This is due to the topology of the folded region, causing effects such as snake states and zero line modes. However, in transport measurements of self-assembled, folded graphene [3, 4, 5], multiple effects occur simultaneously, complicating the analysis of individual contributions. To solve this problem, we use the dry transfer method to fold graphene around hBN, decoupling the overlapping graphene regions. In such heterostructures we observe topologically protected transport behaviour in the folded region.
[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).
[4] S. J. Hong et al., 2D Materials 8, 045009 (2021).
[5] S. J. Hong et al., Phys. Rev. B 105, 205404 (2022).

Keywords: Graphene; Folded Graphene; Zero Line Modes; Snake States; Topological Transport