1. Bremen Center for Computational Materials Science, University of Bremen, P.O. Box 330440, Bremen D-28334, Germany
2. Institute for Theoretical Physics, University of Bremen, Otto-Hahn-Allee 1, Bremen D-28359, Germany
3. Computational Science Research Center, No. 10 East Xibeiwang Road, Beijing 100193, China
4. Computational Science and Applied Research Institute Shenzhen, Shenzhen 518109, China