1. Center for Correlated Electron Systems Institute for Basic Science Seoul 08826 Republic of Korea
2. Department of Physics and Astronomy Seoul National University Seoul 08826 Republic of Korea
3. Department of Materials Science and Engineering Pennsylvania State University University Park PA 16802 USA
4. Department of Materials Science and Engineering and Research Institute of Advanced Materials Seoul National University Seoul 08826 Republic of Korea
5. Department of Physics and Energy Harvest‐Storage Research Center (EHSRC) University of Ulsan Ulsan 44610 Republic of Korea
6. Department of Physics and Photon Science Gwangju Institute of Science and Technology Gwangju 61005 Republic of Korea
7. College of Materials Science and Engineering Zhejiang University of Technology Hangzhou 310014 P. R. China
8. Institute of Materials Research and Engineering A*STAR (Agency for Science, Technology and Research) Singapore 138634 Singapore
9. Imaging and Characterization Core Lab King Abdullah University of Science and Technology Thuwal 23955‐6900 Kingdom of Saudi Arabia
10. Department of Physics Soongsil University Seoul 06978 Republic of Korea