1. Department of Electrophysics, National Chiao Tung University, Hsinchu 30010, Taiwan
2. Department of Nanotechnology, Faculty of Advanced Technology and Multidiscipline, Universitas Airlangga, Surabaya 60115, Indonesia
3. Department of Materials Science and Engineering, National Chiao Tung University, Hsinchu 30010, Taiwan
4. Department of Physics, National Tsinghua University, Hsinchu 30013, Taiwan
5. Institute of Materials Sciences, Vietnam Academy of Science and Technology, Hanoi 10000, Vietnam
6. Advanced Light Source, 1 Cyclotron Road, Berkeley, California 94720, United States