Determination of interatomic coupling between two-dimensional crystals using angle-resolved photoemission spectroscopy
Artikel i vetenskaplig tidskrift, 2020

Lack of directional bonding between two-dimensional crystals like graphene or monolayer transition metal dichalcogenides provides unusual freedom in the selection of components for vertical van der Waals heterostructures. However, even for identical layers, their stacking, in particular the relative angle between their crystallographic directions, modifies properties of the structure. We demonstrate that the interatomic coupling between two two-dimensional crystals can be determined from angle-resolved photoemission spectra of a trilayer structure with one aligned and one twisted interface. Each of the interfaces provides complementary information and together they enable self-consistent determination of the coupling. We parametrise interatomic coupling for carbon atoms by studying twisted trilayer graphene and show that the result can be applied to structures with different twists and number of layers. Our approach demonstrates how to extract fundamental information about interlayer coupling in a stack of two-dimensional crystals and can be applied to many other van der Waals interfaces.



Twisted Bilayer


Joshua Thompson

Kondenserad materie- och materialteori

University of Bath

Ding Pei

University of Oxford

Han Peng

University of Oxford

H. Wang

Peking Unviersity

Nikita Channa

The University of Warwick

University of Bath

Hailin Peng

Peking Unviersity

Alexey Barinov

Elettra-Sincrotrone Trieste ScPA

Niels Schröter

Swiss Light Source, Paul Scherrer Institute

Yulin Chen

University of Oxford

Marcin Mucha-Kruczyński

Centre for Nanoscience and Nanotechnology, University of Bath

University of Bath

Nature Communications

2041-1723 (ISSN)

Vol. 11 3582




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