1. Department of Physics, Govt. Zirtiri Residential Science College, Aizawl, Mizoram 796001, India
2. Condensed Matter Theory Research Group, Department of Physics, Pachhunga University College, Mizoram University, Aizawl, Mizoram 796001, India
3. Science Education Centre, North-Eastern Hill University, Shillong 793003, India
4. Department of Physics, North-Eastern Hill University, Shillong 793022, India