1. Key Laboratory of Artificial Structures and Quantum Control, Shenyang National Laboratory for Materials Science, School of Physics and Astronomy, Shanghai Jiao Tong University, Shanghai 200240, China
2. School of Physics and Astronomy and William I. Fine Theoretical Physics Institute, University of Minnesota, Minneapolis, Minnesota 55455, United States
3. Department of Physics and Astronomy, University of Tennessee, Knoxville, Tennessee 37996, United States
4. Neutron Scattering Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, United States
5. Center for Neutron Research, National Institute of Standards and Technology, MS 6100, Gaithersburg, Maryland 20899, United States
6. Wuhan National High Magnetic Field Center, Huazhong University of Science and Technology, Wuhan 430070, China