1. KU‐KIST Graduate School of Converging Science and TechnologyKorea University 145 Anam‐ro Seongbuk‐gu Seoul 02841 Republic of Korea
2. Department of PhysicsKorea University 145 Anam‐ro Seongbuk‐gu Seoul 02841 Republic of Korea
3. School of Materials Science and EngineeringUlsan National Institute of Science and Technology (UNIST) UNIST‐gil 50 Ulsan 44919 Republic of Korea
4. UNIST Central Research Facilities (UCRF)Ulsan National Institute of Science and Technology (UNIST) UNIST‐gil 50 Ulsan 44919 Republic of Korea