Figure 3
Piezoresponse images for the polarization reversal process in the nanocapacitor arrays.
(a) Topological and piezoresponse amplitude and phase images for the nanocapacitor array, in which in the middle square area was poled downwards (with a bias voltage of −6 V) while the rest part was upwards with a voltage of +6 V; (b) the piezoresponse phase images illustrating the polarization reversal for a selected nanocapacitor dot, which was poled upwards and then downwards using bias of ±6 V, respectively.
