1. Centre de Nanosciences et de Nanotechnologies (C2N)
2. UMR 9001 CNRS
3. Université Paris Saclay
4. Palaiseau
5. France
6. Atomic & Molecular Physics Division
7. Bhabha Atomic Research Centre
8. Mumbai-400 085
9. India
10. Department of Physics
11. University of Free State
12. Bloemfontein
13. South Africa
14. Department of Applied Physics
15. Indian Institute of Technology (Indian School of Mines)
16. Dhanbad-826004