Superconductivity in Metastable K1+δMo6Se8: A Potassium-Intercalated Chevrel Phase - Yun-Qing Shi; Xiao-Ping Ma; Le-Wei Chen; Jun-Kun Yi; Menghu Zhou; Ya-Dong Gu; Qing-Song Yang; Jian-Qi Li; Huai-Xin Yang; Bin-Bin Ruan; Zhi-An Ren (Journal of the American Chemical Society, 2025)