1. State Key Laboratory of Artificial Microstructure and Mesoscopic Physics School of Physics Peking University Beijing 100871 China
2. Frontiers Science Center for Nano‐optoelectronics & Collaboration Innovation Center of Quantum Matter Peking University Beijing 100871 China
3. Beijing National Laboratory for Condensed Matter Physics Institute of Physics University of Chinese Academy of Sciences Chinese Academy of Sciences Beijing 100190 China
4. Institut Jean Lamour Université de Lorraine, CNRS UMR7198, Campus ARTEM 2 Allée André Guinier BP 50840 Nancy 54011 France