J. Parravicini, DelRe, E. , Perego, S. , Acciarri, M. , Binetti, S. , Garcia, Y. , Parapelitsa, G. , Agranat, A.J. , and Parravicini, G. . 2022. “Key Role Of Polar Nanoregions In The Cubic-To-Tetragonal Phase Transition Of Potassium-Based Perovskites”. Phys. Rev B, 106.