Prominent Size Effects without a Depolarization Field Observed in Ultrathin Ferroelectric Oxide MembranesRemoveHaoying Sun, Jiahui Gu, Yongqiang Li, Tula R. Paudel, Di Liu, Jierong Wang, Yipeng Zang, Chengyi Gu, Jiangfeng Yang, Wenjie Sun, Zhengbin Gu, Evgeny Y. Tsymbal, Junming Liu, Houbing Huang, Di Wu, and Yuefeng NiePhys. Rev. Lett. 130, 126801 (2023)