Extended Data Fig. 9: Comparison between AM-KPFM and FM-KPFM.
From: Electrostatic moiré potential from twisted hexagonal boron nitride layers
a, AM-KPFM potential map of the sample in main text. b, FM-KPFM potential map in region. c, Surface potentials of 170 nm period moiré lattice measured by AM-KPFM (blue spheres) and FM-KPFM (red spheres). The solid lines represent sinusoidal fitting. While AM-KPFM images show reduced noise, it is known to underestimate the potential modulation. Due to an averaging effect, AM-KPFM ( ~ 30 meV) yields one fifth of modulation potential extracted from FM-KPFM ( ~ 150 meV).
