Affiliation: | 1.China University of Mining and Technology (Beijing), Beijing 100083, China;2.Laboratory of Computational Physics, Institute of Applied Physics and Computational Mathematics, P.O. Box 8009-12, Beijing 100088, China;3.Department of Physics, Zhejiang University, Hangzhou 310028, China;4.Center for Applied Physics and Technology, Peking University, Beijing 100871, China |