Affiliation: | 1. Physical Engineering College and Laboratory of Materials Physics of the Ministry of Education of China, Zhengzhou University, Zhengzhou, 450052, China 3. School of physics and engineering, Henan University of Science and Technology, Luoyang, 471023, China 2. College of Materials Science and Engineering, Henan University of Science and Technology, Luoyang, 471023, China
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