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Twisted bilayer graphene stacked on hBN forms dual moiré superlattices arising from graphene–graphene and graphene–hBN twist angles, producing layer-dependent periodicities and complex nanoscale heterostructures.

High-resolution TFM amplitude and phase imaging clearly resolve these moiré patterns and reveal local variations in stacking, contrast, and periodicity across the heterostructure.

Scan Conditions

- System: NX-Hivac

- Scan Mode: TFM

- Scan Size: 20 nm×20 nm

- Scan Rate: 20 Hz

- Pixels: 1024×1024

- Cantilever: AD-2.8-AS

(k=2.8 N/m, f=75 kHz)

*Sample courtesy: Goldhaber-Gordon Group, Department of Physics, Stanford Univ., USA