fig1

Figure 1. (A) Illustration of the method for quantifying orientation disorder and fluctuating local polarization P_FL. <D> denotes the average displacement vector, and represents the angular deviation of each individual vector D_i from the average direction; (B) Relationship between piezoelectric coefficient d₃₃ and fluctuating local polarization P_FL. Reproduced from Ref.^[1] under the CC BY 4.0 license. PZT: Pb(Zr,Ti)O₃; PMN: Pb(Mg_1/3Nb_2/3)O₃; BT: BaTiO₃; KNNS: K_0.48Na_0.52Nb_0.955Sb_0.045O₃; KNN50: (K_0.5Na_0.5)NbO₃; BCZT: 0.5(Ba_0.7Ca_0.3)TiO₃-0.5Ba(Zr_0.2Ti_0.8)O₃; PSNN-PT: 0.14Pb(Sc_0.5Nb_0.5)O₃-0.52Pb(Ni_1/3Nb_2/3)O₃-0.34PbTiO₃; PSN: Pb(Sc_0.5Nb_0.5)O₃; PNN: Pb(Ni_1/3Nb_2/3)O₃.