[1] Tsinghua Univ, Dept Phys, State Key Lab Low Dimens Quantum Phys, Beijing 100084, Peoples R China
[2] Univ Oxford, Dept Phys, Clarendon Lab, Parks Rd, Oxford OX1 3PU, England
[3] Lawrence Berkeley Natl Lab, Adv Light Source, Berkeley, CA 94720 USA
[4] ShanghaiTech Univ, Sch Phys Sci & Technol, Shanghai 201210, Peoples R China
[5] CAS Shanghai Sci Res Ctr, Shanghai 201210, Peoples R China
[6] Synchrotron SOLEIL, Orme Merisiers, St Aubin BP 48, F-91192 Gif Sur Yvette, France
[7] Elettra Sincrotrone Trieste, I-34149 Trieste, Basovizza, Italy
[8] ShanghaiTech Lab Topol Phys, Shanghai 200031, Peoples R China
[9] Nanjing Univ, Natl Lab Solid State Microstruct, Nanjing 210093, Peoples R China
[10] Nanjing Univ, Dept Phys, Nanjing 210093, Peoples R China
[11] Frontier Sci Ctr Quantum Informat, Beijing 100084, Peoples R China