Nature CommunicationsImproper antiferroelectricity in NaNbO3-based perovskites driven by antiferrodistortive modulationChao XuNengneng LuoCenchen ZhongGengguang LuoRuoxuan CheXuyun GuoChangsheng ChenShujun ZhangYe Zhu2025-07-01Full textDOI https://doi.org/10.1038/s41467-025-60568-w