1. Department of Physics and Department of Materials Science and Engineering, City University of Hong Kong, Tat Chee Avenue, Kowloon, Hong Kong, China
2. State Key Laboratory of Advanced Processing and Recycling of Nonferrous Metals, Lanzhou University of Technology, 287 Langongping Road, Lanzhou 730050, China
3. Institute of Mineral Resources Development and Utilization, Changsha Research Institute of Mining and Metallurgy Co., Ltd., 966 South Lushan Road, Changsha 410012, China
4. Faculty of Metallurgical and Energy Engineering, Kunming University of Science and Technology, 68 Wenchang Road, 121 Street, Kunming 650093, China
5. College of Materials Science and Engineering, Kunming University of Science and Technology, 727 South Jingming Road, Chenggong New District, Kunming 650093, China