Affiliation: | a Department of Physics, Xiangtan University, Hunan Province 411105, China b Key Laboratory of Low Dimensional Materials and Application Technology, Ministry of Education (Xiangtan University), Hunan Province 411105, China c School of Chemistry and Chemical Engineering, Guangxi University, Nanning 530004, China d Light Alloy Net Forming National Engineering Research Center, School of Materials Science and Engineering, Shanghai Jiaotong University, Shanghai 200030, China |