Determination of charge-compensated C 3v (II) centers for Er 3+ ions in CdF 2 and CaF 2 crystals
Rui-Peng Chai(柴瑞鹏), Dan-Hui Hao(郝丹辉), Dang-Li Gao(高当丽), and Qing Pang(庞庆)
中国物理B . 2021, (3): 37601 .  DOI: 10.1088/1674-1056/abc3b0