1. Key Laboratory for the Physics and Chemistry of Nanodevices, Center for Carbon-Based Electronics, Frontiers Science Center for Nano-optoelectronics, and Department of Electronics, Peking University, Beijing 100871, China
2. Academy for Advanced Interdisciplinary Studies, Peking University, Beijing 100871, China
3. Hunan Institute of Advanced Sensing and Information Technology, Xiangtan University, Hunan 411105, China