Department of Physics, Hunan University, Changsha, 410082, China
College of Materials Science and Engineering, Hunan University, Changsha, 410082, China
Department of Physics, Hunan University, Changsha, 410082, China
Department of Physics, Hunan University, Changsha, 410082, China
Department of Physics, Hunan University, Changsha, 410082, China
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