1. State Key Laboratory of Surface Physics and Institute for Nanoelectronic Devices and Quantum Computing, Fudan University, Shanghai 200433, China
2. Physics Department “E.R. Caianiello” and CNR-SPIN Salerno Unit, Universitá Degli Studi di Salerno, Via Giovanni Paolo II, 132, I-84084 Fisciano (Sa), Italy
3. INFN─Gruppo Collegato di Salerno, I-84084 Fisciano, Italy
4. Institute for Theoretical Solid State Physics, IFW Dresden, Helmholtzstr. 20, 01069 Dresden, Germany
5. Physics Department “Ettore Pancini”, Universitá Degli Studi di Napoli “Federico II”, Complesso Univ. Monte S. Angelo, Via Cintia, I-80126 Napoli, Italy
6. CNR-SPIN Napoli Unit, Complesso Univ. Monte S. Angelo, Via Cintia, I-80126 Napoli, Italy
7. INFN Napoli Unit, Complesso Univ. Monte S. Angelo, Via Cintia, I-80126 Napoli, Italy
8. Zhangjiang Fudan International Innovation Center, Fudan University, Shanghai 201210, China
9. Department of Physics, Fudan University, Shanghai 200433, China
10. Shanghai Research Center for Quantum Sciences, Shanghai 201315, China
11. Collaborative Innovation Center of Advanced Microstructures, Nanjing 210093, China