1. Department of Physics, School of Physical Sciences, Mizoram University, Aizawl796004, Mizoram, India
2. Physical Sciences Research Centre (PSRC), Pachhunga University College, Mizoram University, Aizawl796001, Mizoram, India
3. North Eastern Hill University, Shillong793022, Meghalaya, India
4. Department of Physics, Indian Institute of Technology Madras, Chennai600036, Tamil Nadu, India