Quantum Phase Transition of a Molecular Radical Pair - Xin Li; Tie-Feng Fang; Yang He; Yajie Zhang; Ziyong Shen; Yaping Zang; Song Gao; Lianmao Peng; Shimin Hou; Kai Wu; Qing-Feng Sun; Yongfeng Wang (Journal of the American Chemical Society, 2026)