2-layer hBN on Graphene
hBN stacked on graphene forms a Moiré superlattice due to lattice-constant mismatch and slight angular misalignment between the two layers.
While height shows minimal height difference between 1L and 2L regions, Heterodyne KPFM and DFRT-PFM clearly distinguish layer-dependent electrical and electromechanical contrast, confirming the interlayer origin of the Moiré pattern.
Scan Conditions
- System: FX200
- Scan Mode: Heterodyne KPFM, DFRT-PFM
- Scan Size: 5 µm×5 µm
- Scan Rate: 0.25 Hz, 0.4 Hz
- Pixels: 1024×512
- Cantilever: Multi75E-G
(k=3 N/m, f=75 kHz)
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