[1] Chinese Acad Sci, Inst Solid State Phys, Key Lab Mat Phys, Hefei 230031, Peoples R China
[2] Southern Univ Sci & Technol, Dept Phys, Shenzhen 518055, Peoples R China
[3] Jiangsu Univ Sci & Technol, Dept Phys, Zhenjiang 212003, Jiangsu, Peoples R China
[4] Chinese Acad Sci, High Field Magnet Lab, Hefei 230031, Peoples R China
[5] Nanjing Univ, Collaborat Innovat Ctr Adv Microstruct, Nanjing 210093, Peoples R China