Author(s): Hao-Cheng Thong, Bo Wu, Fan Hu, Pedro B. Groszewicz, Chen-Bo-Wen Li, Jun Chen, Mao-Hua Zhang, Dragan Damjanovic, Ben Xu, and Ke Wang We report the discovery of a geometric pathway for tuning ferroelectric properties through a thermally driven reconfiguration between coexisting polar states in Li-substituted ${\mathrm{NaNbO}}_{3}$. Using a first-principles density functional theory calculation and $^{7}\mathrm{Li}$ solid-state nuc… [Phys. Rev. Lett. 137, 036801] Published Tue Jul 14, 2026