1. Department of Materials Science and Engineering; Southern University of Science and Technology; Shenzhen 518055 China
2. Department of Physics; Southern University of Science and Technology; Shenzhen 518055 China
3. Beijing Institute of Aeronautical Materials; AECC; Beijing 100095 China
4. Shenzhen Key Laboratory of Advanced Thin Films and Applications; College of Physics and Energy; Shenzhen University; Shenzhen 518060 China
5. Beijing Synchrotron Radiation Facility; Institute of High Energy Physics; Chinese Academy of Sciences; Beijing 100049 China
6. Shanghai Synchrotron Radiation Facility; Shanghai Institute of Applied Physics; Chinese Academy of Sciences; Shanghai 201204 China