1. Department of Physics; Imperial College London; Exhibition Road London SW7 2AZ United Kingdom
2. Institute of Physical Chemistry and Center for Computational Sciences, Johannes Gutenberg University Mainz; Staudinger Weg 7 Mainz D-55128 Germany
3. Department of Physics; DAV University Jalandhar; Warburger Str. 100 Punjab India
4. Dynamics of Condensed Matter, Department of Chemistry; University of Paderborn; Warburger Str. 100 Padeborn D-33102 Germany
5. Paderborn Center for Parallel Computing and Institute for Lightweight Design with Hybrid Systems, University of Paderborn; Warburger Str. 100 Padeborn D-33102 Germany