1. Institute of Microstructure and Property of Advanced Materials, Faculty of Materials and Manufacturing, Beijing University of Technology, Beijing 100124, China
2. Beijing Key Laboratory of Microstructure and Properties of Solids, Beijing University of Technology, Beijing 100124, China
3. Key Laboratory of Optoelectronics Technology, College of Microelectronics, Faculty of Information Technology, Beijing University of Technology, Beijing 100124, China
4. Low Temperature Physics Laboratory, College of Physics, Chongqing University, Chongqing 401331, China