1. Department of Physics, Raghuveer Singh Government Degree College, Lalitpur-284403, India
2. School of Science, Indrashil University, Mehsana, Gandhinagar-382740, India
3. Department of Physics, Sardar Vallabhbhai National Institute of Technology, Surat-395007, India
4. Department of Physics, Bundelkhand University, Jhansi-284003, India