Extended Data Fig. 1: PFM images and analysis.
From: Switchable moiré potentials in ferroelectric WTe2/WSe2 superlattices
a, Raw PFM image of an angle-aligned monolayer Td-WTe2/monolayer H-WSe2 heterostructure. b, Fourier transform of the raw image. Fourier peaks corresponding to a centred-rectangular lattice can be clearly observed. c, d, The Fourier-filtered PFM image (c) and the corresponding Fourier transform (d). A high-pass filter is applied with a threshold of 72 % of the maximum intensity.
