1. Department of Physics and KI for the NanoCentury, Korea Advanced Institute of Science and Technology, 291 Daehak-ro,
Yuseong-gu, Daejeon 34141, Republic of Korea
2. Advanced Materials & Component Lab, R&D Center, LG Innotek, 46, Baumoe-ro 6-gil, Seocho-gu, Seoul 06763, Republic of Korea