1. Samsung
Advanced Institute of Technology, Samsung Electronics Co., Ltd., Mt. 14-1, Nongseo-Dong, Giheung-Gu, Yongin-Si, Gyeonggi-Do, 446-712, Korea
2. Center
for Artificial Low Dimensional Electronic Systems, Institute for Basic Science, Pohang, 790-784, Korea
3. Spin
Convergence Research Center, Korea Institute of Science and Technology, Seoul, 136-791, Korea
4. Department
of Materials Science and Engineering, Hanbat National University, 125 Dongseo-daero, Yuseong-Gu, Daejeon, 305-719, Korea