1. State Key Discipline Laboratory of Wide Band Gap Semiconductor Technology Shaanxi Joint Key Laboratory of Graphene School of Microelectronics Xidian University Xi’an 710071 China
2. Centre for Spintronics and Quantum System State Key Laboratory for Mechanical Behavior of Materials School of Materials Science and Engineering Xi’an Jiaotong University Xi’an 710049 China
3. Advanced Interdisciplinary Research Center for Flexible Electronics Xidian University Xi’an 710071 China
4. Key Laboratory of Applied Surface and Colloid Chemistry National Ministry of Education Shaanxi Engineering Lab for Advanced Energy Technology School of Materials Science and Engineering Shaanxi Normal University Xi’an 710119 China