1. School of Information Science and Technology, Northwest University, Xi’an 710127, P. R. China
2. State Key Laboratory for Mesoscopic Physics and Department of Physics, Peking University, Beijing 100871, P. R. China
3. Key Laboratory for the Physics and Chemistry of Nanodevices and Department of Electronics, Peking University, Beijing 100871, P. R. China
4. Collaborative Innovation Center of Quantum Matter, Beijing 100871, P. R. China
5. Beijing Key Laboratory for Magnetoelectric Materials and Devices (BKL-MEMD), Peking University, Beijing 100871, P. R. China