1. Department of Physics, Birla Institute of Technology, Ranchi, India
2. School of Physical Sciences, Swami Ramanand Teerth Marathwada University, Nanded, India
3. Department of Physics, Utkala University, Bhubaneswar, India
4. School of Physics, University of Hyderabad, Hyderabad, India
5. Centre for Physical Sciences, Central University of Punjab, Bathinda, India