Fig. 2. Potentiation and depression cycles with a constant pulse amplitude scheme.

The write pulse width $t_{\mathrm{w}}$ was modulated from 10 ns to 1 s while keeping the write pulse amplitude $V_{\mathrm{w}}$ constant at 6 V (−6 V) for the potentiation (depression) on a FeFET with L = 400 nm and W = 1 μm. a Source-drain resistance as a function of the pulse number for $20$ consecutive cycles. On the bottom, the corresponding duration $t_{\mathrm{w}}$ of each pulse is provided. b Superposition of the data points shown in a) and represented as a function of the pulse number in each cycle, to visualize the small cycle-to-cycle variations and potentiation and depression shape.