SKM 2023 – wissenschaftliches Programm
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O: Fachverband Oberflächenphysik
O 74: 2D Materials IV: Heterostructures (joint session O/CPP)
O 74.7: Vortrag
Donnerstag, 30. März 2023, 12:00–12:15, GER 37
Lateral heterostructures of graphene and h-BN with atomic lattice coherence and tunable rotational order — •Haojie Guo1, Ane Garro-Hernandorena1, Antonio J. Martínez-Galera2,3, and José M. Gómez-Rodríguez1,3,4 — 1Departamento de Física de la Materia Condensada, Universidad Autónoma de Madrid, E-28049 Madrid, Spain — 2Departamento de Física de Materiales, Universidad Autónoma de Madrid, E-28049 Madrid, Spain — 3Instituto Nicolás Cabrera, Universidad Autónoma de Madrid, E-28049 Madrid, Spain — 4Condensed Matter Physics Center (IFIMAC), Universidad Autónoma de Madrid, E-28049 Madrid, Spain
In-plane heterostructures of graphene and h-BN exhibit exceptional properties, which are sensitive to the structure of the alternating domains. However, achieving accurate control over their structural properties, while keeping a high perfection of the graphene-h-BN boundaries, still remains a challenge. Here, the growth of lateral heterostructures of graphene and h-BN on Rh(110) surfaces is reported. The choice of the 2D material, grown firstly, determines the structural properties of the whole heterostructure layer, allowing to have control over the rotational order of the domains. The atomic-scale observation of the boundaries demonstrates a perfect lateral matching. Lateral heterostructures floating over an oxygen layer have been successfully obtained, enabling to observe intervalley scattering processes in graphene regions. The high tuning capabilities of these heterostructures suggests their usage as testbeds for fundamental studies.