1. Department of Physics, Pohang University of Science and Technology (POSTECH), Pohang 37673, Korea
2. Department of Materials Science and Engineering, Pohang University of Science and Technology (POSTECH), Pohang 37673, Korea
3. Center for Correlated Electron Systems, Institute of Basic Science, Seoul 08826, Korea
4. Department of Physics and Astronomy, Seoul National University, Seoul 08826, Korea
5. Advanced Institute of Convergence Technology, Seoul National University, Suwon 16229, Korea
6. Material Research Center, Samsung Advanced Institute of Technology (SAIT), Samsung Electronics, Suwon 16678, Korea
7. Center for van der Waals Quantum Solids, Institute for Basic Science (IBS), Pohang 37673, Korea
8. Department of Semiconductor Engineering, Pohang University of Science and Technology, Pohang 37673, Korea