1. Center for Electronic Materials; Korea Institute of Science and Technology; 5 Hwarang-ro 14-gil Seongbuk-gu Seoul 02792 Republic of Korea
2. Hewlett Packard Laboratories; Hewlett Packard Enterprise; Palo Alto California 94304 USA
3. Department of Electrical Engineering; Sejong University; Neungdong-ro 209 Gwangjin-gu Seoul 143-747 Republic of Korea
4. Department of Materials Science and Engineering; Seoul National University of Science and Technology; Seoul 01811 Republic of Korea
5. Department of Materials Science and Engineering; Inter-university Semiconductor Research Center; College of Engineering; Seoul National University; Seoul 151-744 Republic of Korea