1. Department of Physics, Tezpur University (Central University), Tezpur-784028, India
2. UGC-DAE Consortium for Scientific Research, Mumbai Centre, R-5 Shed, Bhabha Atomic Research Centre, Mumbai 400085, India
3. Centre of Biomedical Research, SGPGIMS Campus, Lucknow 226014, India
4. Department of Molecular Biology and Biotechnology, Tezpur University (Central University), Tezpur784028, India
5. Department of Electrical Engineering, IIT Bombay, Mumbai 400076, India
6. Solid State Physics Division, Bhabha Atomic Research Centre, Mumbai 400085, India