SKM 2023 – scientific programme
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HL: Fachverband Halbleiterphysik
HL 33: Poster II
HL 33.12: Poster
Wednesday, March 29, 2023, 17:00–19:00, P1
Quantum transport in twisted bilayer graphene supermoiré heterostructures — Alexander Rothstein1, Robin Dolleman1, Christoph Schattauer2, •Anthony Achtermann1, Stefan Trellenkamp3, Florian Lentz3, Kenji Watanabe4, Takashi Taniguchi5, Dante Kennes6, Florian Libisch2, Bernd Beschoten1, and Christoph Stampfer1 — 12nd 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.