1. Department of Physics, Mohanlal Sukhadia University, Udaipur-313001, India
2. Department of Physics, Gujarat Arts and Science College, Ellisbrige, Ahmedabad, 380006, India
3. Department of Physics, University Institute of Sciences, Chandigarh University, Mohali, 140413, India
4. University Centre for Research & Development, Chandigarh University, Mohali, 140413, India