1. Key Laboratory for Quantum Matter Science, Key Laboratory of Photovoltaic Materials, Henan University, Kaifeng 475004, China
2. School of Materials Science and Engineering, Henan University, Kaifeng 475004, China
3. Department of Physics, National University of Singapore, Singapore 117542, Singapore
4. International Center for Quantum Design of Functional Materials (ICQD), University of Science and Technology of China, Hefei 230026, China