1. Department of Physics, National University of Defense Technology, Changsha 410073, Hunan, China
2. College of Advanced Interdisciplinary Studies & Hunan Provincial Key Laboratory of Novel Nano-Optoelectronic Information Materials and Devices, National University of Defense Technology, Changsha 410073, Hunan, China
3. Institute of Electronic Engineering, China Academy of Engineering Physics, Mianyang 621900, Sichuan, China
4. Department of Materials Science and Engineering, National University of Singapore, Singapore 117575, Singapore
5. Chongqing 2D Materials Institute, Liangjiang New
Area, Chongqing 400714, China