1. Department of Physics, The University of Hong Kong, Pokfulam Road, Hong Kong
2. Department of Physics, Southern University of Science and Technology, No. 1088, Xueyuan Road, Shenzhen, 518055 Guangdong, PR China
3. Department of Physics, The Hong Kong University of Science and Technology, Clearwater Bay, Hong Kong
4. Department of Electronic and Information Engineering, The Hong Kong Polytechnic University, 11 Yuk Choi Road, Hung Hom, Hong Kong
5. Ruđer Bošković Institute, Bijenička 54, 10000 Zagreb, Croatia
6. Center for Computational Science and Engineering, Southern University of Science and Technology, No. 1088, Xueyuan Road, Shenzhen, 518055 Guangdong, PR China