1. Key Laboratory of Semiconductor Materials Science, Institute of Semiconductors, Chinese Academy of Sciences, Beijing 100083, and College of Materials Science and Opto-Electronic Technology, University of Chinese Academy of Sciences, Beijing
101408, China
2. Key Laboratory of Semiconductor Materials Science, Institute of Semiconductors, Chinese Academy of Sciences, Beijing 100083, and College of Materials Science and Opto-Electronic Technology, University of Chinese Academy of Sciences, Beijing 101408,
China