Affiliation: | 1. The School of Science, Southwest University of Scienceand Technology, Mianyang 621010, China;2. State Key Laboratory of Magnetic Resonance and Atomic andMolecular Physics, Wuhan Institute of Physics and Mathematics, the ChineseAcademy of Sciences, Wuhan 430070, China;3. The Department of Modern Physics, University of Scienceand Technology of China, Hefei 230026, China |