1. Department of Energy Science, Sungkyunkwan University, Suwon 16419, Republic of Korea
2. Department of Physics, Kunsan National University, Gunsan54150, Republic of Korea
3. Center for Composite Materials and Concurrent Design, Sungkyunkwan University, Suwon 16419, Republic of Korea
4. Artificial Atom and Quantum Materials Center, Sungkyunkwan University, Suwon 16419, Republic of Korea
5. SKKU Institute of Energy Science and Technology (SIEST), Sungkyunkwan University, Suwon 16419, Republic of Korea
6. Department of Physics, Hanyang University, Seoul 04763, Republic of Korea
7. Department of Energy Engineering, Hanyang University, Seoul 04763, Republic of Korea