1. Department of Materials Science, Indian Association for the Cultivation of Science, Jadavpur, Kolkata 700032, India
2. Discipline of Physics, Indian Institute of Technology Indore, Simrol, Indore 453552, India
3. Condensed Matter Theory Group, Department of Physics and Astronomy, Uppsala University, Box-516, 75120 Uppsala, Sweden
4. Applied Materials Physics, Department of Materials and Engineering, Royal Institute of Technology (KTH), S-10044, Stockholm, Sweden
5. Department of Metallurgical and Materials Engineering, Indian Institute of Technology, Kharagpur 721302, West Bengal, India