Yunfan Wang, Zihao Zheng, Lele Ren, Yifeng Du, Jinming Guo, Shujun Zhang, Ce-Wen Nan, Bao-Wen Li. "Room-temperature ferroelectricity in NaNbO3 membrane." Nature Communications, 2026. doi:10.1038/s41467-026-74642-4