1. School of Engineering, RMIT University, Melbourne, VIC 3000, Australia
2. Academy of Scientific and Innovative Research, CSIR-HRDC Campus, Ghaziabad, Uttar Pradesh 201002, India
3. CSIR-National Physical Laboratory, Dr. K.S. Krishnan Road, New Delhi 110012, India
4. Epitaxy Department, Paul-Drude-Institut für Festkörperelektronik, Hausvogteiplatz 5-7, 10117 Berlin, Germany
5. RMIT Microscopy and Microanalysis Facility, RMIT University, Melbourne 3000, Australia