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SKM 2023 – wissenschaftliches Programm

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HL: Fachverband Halbleiterphysik

HL 33: Poster II

HL 33.12: Poster

Mittwoch, 29. März 2023, 17:00–19:00, P1

Quantum transport in twisted bilayer graphene supermoiré heterostructuresAlexander Rothstein1, Robin Dolleman1, Christoph Schattauer2, •Anthony Achtermann1, Stefan Trellenkamp3, Florian Lentz3, Kenji Watanabe4, Takashi Taniguchi5, Dante Kennes6, Florian Libisch2, Bernd Beschoten1, and Christoph Stampfer112nd Institute of Physics, RWTH Aachen University, Germany — 2Institute for Theoretical Physics, TU Wien, Austria — 3Helmholtz Nano Facility, Forschungszentrum Jülich, Germany — 4Research Center for Functional Materials, National for Material Science, 1-1 Namiki, Japan — 5International Center for Materials Nanoarchitectonics, National Institute for Materials Science, 1-1 Namiki, Japan — 6Institute for Theory of Statistical Physics, RWTH Aachen University, and Jara Fundamentals of Future Information Technology, Germany

Twisted bilayer graphene hosts a plethora of correlated quantum phenomena, such as superconductivity, correlated insulators and strange metal phases. The unprecedented in-situ gate-tunability of the system allows the study the underlying physics in detail by means of quantum transport experiments. The microscopic details of the van-der-Waals heterostructure, like the presence of competing moiré lattices, heavily influence the exact characteristics of the device. Here, we investigate different conductance regimes in near-magic angle twisted bilayer graphene devices, focusing on the insulating states. We are able to identify the presence of super-moiré lattices in our devices from magneto-transport experiments and compare our results with theory.

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