Hao Liu, Yihe Chen, Jian Wang, Shuhong Huang, Longbao Xiang, ShiCheng Yu, Chengbin Li, Lijun Du, Lei She. "Realization of a compact mercury ion microwave clock with frequency stability of 6.3 × 10− 16." Scientific Reports (2025). https://doi.org/10.1038/s41598-025-30416-4