1. Department of Physics, National Cheng Kung University, Tainan 70101, Taiwan
2. Department of Physics, National Sun Yat-Sen University, Kaohsiung 80424, Taiwan
3. Advanced Optoelectronic Technology Center (AOTC), National Cheng Kung University, Tainan 70101, Taiwan
4. Taiwan Consortium of Emergent Crystalline Materials (TCECM), Ministry of Science and Technology, Taipei 10622, Taiwan
5. School of Electronic Science and Applied Physics, Hefei University of Technology, Hefei, Anhui 230009, China
6. M.N. Miheev Institute of Metal Physics, Ekaterinburg 620137, Russia