1. Department of Physics, University School of Sciences, Gujarat University, Ahmedabad 380 009, India
2. Laboratory for Chemistry of Novel Materials, University of Mons (UMONS), 20 Place du Parc, Mons 7000, Belgium
3. Computational Materials and Nanoscience Group, Department of Physics and Electronics, St. Xavier’s College, Ahmedabad 380 009, India
4. Condensed Matter Theory Group, Department of Physics and Astronomy, Uppsala University, Box 516, Uppsala 751 20, Sweden
5. Department of Physics, Indian Institute of Technology Ropar, Rupnagar 140001, Punjab, India