1. Department of Energy Science Sungkyunkwan University Suwon 16419 Republic of Korea
2. School of Physical Science and Technology ShanghaiTech University Shanghai 201210 China
3. ShanghaiTech Laboratory for Topological Physics ShanghaiTech University Shanghai 201210 China
4. Shanghai Key Laboratory of High‐Resolution Electron Microscopy ShanghaiTech University Shanghai 201210 China
5. Quantum Spin Team Korea Research Institute of Standards and Science Daejeon 34113 Republic of Korea