Regensburg 2022 – wissenschaftliches Programm
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O: Fachverband Oberflächenphysik
O 54: Poster Wednesday: 2D Materials 2
O 54.1: Poster
Mittwoch, 7. September 2022, 18:00–20:00, P4
Mapping angle- and doping-dependent dispersion of bending graphene — •Zhihao Jiang1, Paulina Majchrzak1, Bjarke Jessen2, Maëlle Kapfer2, Deepnarayan Biswas1, Jose Avila3, Pavel Dudin3, Cory Dean2, and Søren Ulstrup1 — 1Aarhus University — 2Columbia University — 3Synchrotron SOLEIL
The possibility to systematically engineer the interlayer rotation angle (θ) between two-dimensional (2D) materials stacked in heterostructures offers an intriguing means to tailor superlattices, electronic band structures and interactions. Here, we set out to perform a proof-of-principle nanoARPES experiment demonstrating the ability to continuously twist a graphene flake stacked on hexagonal boron nitride by tuning θ using a nano-rotation device engaged by the tip of an atomic force microscope (AFM). The overarching objective is thereby to capture the evolution of the θ-dependent electronic dispersion of graphene. Ultimately, these experiments are expected to pave the way for band structure measurements of systematically twisted heterostructures composed of bilayer graphene and monolayer dichalcogenides.