1. SKKU Advanced Institute of Nano Technology, Sungkyunkwan University, Suwon, Gyeonggi-do 16419, Republic of Korea
2. Quantum Information Research Support Center, Sungkyunkwan University, Suwon, Gyeonggi-do 16419, Republic of Korea
3. International Centrer for Materials Nanoarchitectonics, National Institute for Materials Science, Ibaraki 305-0044, Japan
4. Research Center for Functional Materials, National Institute for Materials Science, Ibaraki 305-0044, Japan
5. Department of Materials Science and Engineering, Chungnam National University, Daejeon 34134, Republic of Korea