1. Graduate Institute of Applied Science and Technology, National Taiwan University of Science and Technology, Taipei 10607, Taiwan
2. National Synchrotron Radiation Research Center, Hsinchu 30076, Taiwan
3. Department of Physics, National Sun Yat-sen University, Kaohsiung 80424, Taiwan
4. Department of Electrophysics, National Yang Ming Chiao Tung University, Hsinchu 300, Taiwan
5. Taiwan Consortium of Emergent Crystalline Materials, National Science and Technology Council, Taipei 10601, Taiwan
6. Department of Physics, National Taiwan Normal University, Taipei 11677, Taiwan
7. Institute of Physics, Academia Sinica, Taipei 115201, Taiwan