School of Physics and Microelectronics, Shandong University, Jinan 250100;
Department of Mathematics and Physics, Shandong Institute of Architecture and Engineering, Jinan 250014;
School of Physics and Microelectronics, Shandong University, Jinan 250100;
State Key Laboratory of Theoretical and Computational Chemistry, Institute of Theoretical Chemistry, Jilin University, Changchun 130023;