Institution: | Department of Physics, Tsinghua University, Beijing 100084, China;
2. Collaborative Innovation Center of Quantum Matter, Beijing 100084, China;
3. Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, China;
4. Department of Physics and Triangle Universities Nuclear Laboratory, Duke University, Durham, NC 27708, U. S. A.;
5. Duke Kunshan University, Kunshan, Jiangsu 215316, China |