Extended Data Fig. 4: Further ferroelectric hysteresis measurements (device 2).
From: Polytype switching by super-lubricant van der Waals cavity arrays
a, Topographic and KPFM maps of the cavity array. b–d, Hysteresis loops of the cavities marked in a, with diameters of 150, 250 and 350 nm, respectively. Bright and dark column stands for the switching to complete up-polarization and down-polarization.
