1. Department of Physics Southern University of Science and Technology Shenzhen 518055 China
2. School of Material Science and Engineering Dongguan University of Technology Dongguan 523000 China
3. SUSTech Core Research Facilities Southern University of Science and Technology Shenzhen 518055 China
4. Laboratory of Synchrotron Radiation Institute of High Energy Physics Chinese Academy of Sciences Beijing 100039 China
5. Departament de Física Universitat Politècnica de Catalunya Campus Nord B4‐B5 Barcelona E‐08034 Spain