[1] Northwest Univ Xian, Inst Modern Phys, 229 Taibai Beilu, Xian 710069, Shaanxi, Peoples R China
[2] Shaanxi Key Lab Theoret Phys Frontiers, 229 Taibai Beilu, Xian 710069, Shaanxi, Peoples R China
[3] Chinese Acad Sci, Inst Phys, 8 3rd South St, Beijing 100190, Peoples R China
[4] Northwest Univ Xian, Sch Phys, 229 Taibai Beilu, Xian 710069, Shaanxi, Peoples R China
[5] Univ Chinese Acad Sci, Sch Phys Sci, Beijing, Peoples R China
[6] Collaborat Innovat Ctr Quantum Matter, Beijing, Peoples R China