Affiliation: | 1. Department of Materials Science and Engineering, Korea Advanced Institute of Science and Technology, Daejeon, Republic of Korea;2. Graduate School of Nanoscience and Technology, Korea Advanced Institute of Science and Technology, Daejeon, Republic of Korea;3. Division of Advanced Materials Engineering, Kongju National University, Chungnam, Republic of Korea;4. Department of Physics, Chungbuk National University, Cheongju, Republic of Korea |