1. Department of Materials Science and Engineering, National Tsing Hua University, Hsinchu 30013, Taiwan
2. Department of Physics, National Sun Yat-Sen University, Kaohsiung 80424, Taiwan
3. Frontier Research Center on Fundamental and Applied Sciences of Matters, National Tsing Hua University, Hsinchu 30013, Taiwan
4. Instrument Center, National Tsing Hua University, Hsinchu 30013, Taiwan
5. National Synchrotron Radiation Research Center, Hsinchu 30076, Taiwan
6. Laboratory of Functional Films and Coatings, Nikolaev Institute of inorganic chemistry SB RAS, Lavrent’ev ave. 3, Novosibirsk 630090, Russia