1. Department of Physics and Astronomy, West Virginia University, Morgantown, West Virginia 26506, United States
2. State Key Laboratory of Structural Analysis, Optimization and CAE Software for Industrial Equipment, Dalian University of Technology, Dalian, 116024, China
3. Key Laboratory of Materials Modification by Laser, Ion and Electron Beams (Dalian University of Technology), Ministry of Education, Dalian 116024, China
4. Department of Physics and Texas Center for Superconductivity, University of Houston, Houston, Texas, 77204, United States
5. Beijing National Laboratory for Condensed Matter Physics and Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China
6. Department of Materials Science and Engineering, University of Wisconsin−Madison, Madison, Wisconsin 53706, United States
7. Center for Nanophase Materials Sciences, Oak Ridge National Laboratory, Oak Ridge, Tennessee, 37831 United States