High-performance colossal permittivity behaviour persists to ultralow temperature in Co+Ta co-doped SnO2: A spin-defect mediated superstable large electronic moment of defect-dipole

Wen Dong, Fan Tian, Qi Ma, Dequan Jiang, Samuel D. Seddon, Alan E. Brunier, Zhengcai Xia, Syed ul Hasnain Bakhtiar, Ling Miao, Qiuyun Fu