1. Center for Semiconductor Technology Convergence Department of Electrical Engineering Pohang University of Science and Technology 77, Cheongam‐ro, Nam‐gu Pohang Gyeongbuk 37673 Republic of Korea
2. School of Materials Science and Engineering Gwangju Institute of Science and Technology 123, Cheomdangwagi‐ro, Buk‐gu Gwangju 61005 Republic of Korea