1. Department of Physics, School of Natural Sciences, Shiv Nadar University, NH 91, Tehsil Dadri, G. B. Nagar, Greater Noida, Uttar Pradesh 201314, India
2. Solid State Physics Division, Bhabha Atomic Research Centre, Mumbai 400085, India
3. Homi Bhabha National Institute, Anushaktinagar, Mumbai 400094, India