1. Department of Physics, Manipal Institute of Technology, Manipal Academy of Higher Education, Manipal-576104, India
2. Department of Atomic and Molecular Physics, Manipal Institute of Technology, Manipal Academy of Higher Education, Manipal-576104, India
3. School of Materials Science and Engineering, UNSW, Sydney, NSW, 2052, Australia
4. ARC Centre of Excellence in Future Low-Energy Electronics Technologies, UNSW, Sydney, NSW, 2052, Australia
5. DST Purse Lab, Mangalore University, Mangalagangotri, Mangalore-574199, India
6. College of Science and Engineering, Flinders University, Bedford Park, Adelaide, SA, 5042, Australia
7. Flinders Institute for Nanoscale Science and Technology, Flinders University, Adelaide, SA, 5042, Australia