Twist angle homogeneity in twisted bilayer graphene devices studied with STM
ORAL
Abstract
Theoretic models that describe magic-angle twisted bilayer graphene strongly depend on how homogeneous the twist angle is. Furthermore, (in)homogeneity is suggested to be the cause for differences between similar devices fabricated by different research groups. It is thus of high importance to characterize the (in)homogeneity experimentally, on the local scale. We use scanning tunneling microscopy to explore non-encapsulated twisted bilayer graphene devices with different nominal twist angles. In this talk, I will introduce a new method to quantitatively describe the local (in)homogeneity present in these devices, potentially on different length scales.
*This work was supported by the European Research Council (ERC StGSpinMelt) and by the Dutch Research Council (NWO), as part of the Frontiers of Nanoscience programme, as well as through a Vidi grant (680-47-536). D.K.E. acknowledges support from the Ministry of Economy and Competitiveness of Spain through the “Severo Ochoa” program for Centres of Excellence in R&D (SE5-0522), Funda-cio Privada Cellex, Fundacio Privada Mir-Puig, the Generalitat de Catalunya through the CERCA program, the H2020 Programme under grant agreement n 820378, Project: 2D SIPC and the La Caixa Foundation.
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Presenters
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Tjerk Benschop
- Leiden University
- Leiden Institute of Physics, Leiden University