1. Department of Physics, School of Natural Sciences, Shiv Nadar University, NH-91, Tehsil Dadri, Gautam Buddha Nagar, Uttar Pradesh 201314, India
2. Materials Research Centre, Indian Institute of Science, Bangalore 560012, India
3. UGC-DAE Consortium for Scientific Research, Khandwa Road, Indore, Madhya Pradesh 452001, India